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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_655"/> |
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| <presentationLink xlink:type="extended" xlink:role="http://www.hudsontech.com/role/SharebasedCompensationTables"> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_39"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_40"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationAbstract_38" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_40" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
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| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationAbstract_38" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock_41" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
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| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationAbstract_38" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTableTextBlock_42" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock_688"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationAbstract_38" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock_688" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
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| <presentationLink xlink:type="extended" xlink:role="http://www.hudsontech.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_47"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_SignificantAccountingPoliciesTable" xlink:label="loc_hdsn_SignificantAccountingPoliciesTable_48"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_47" xlink:to="loc_hdsn_SignificantAccountingPoliciesTable_48" use="optional" order="1" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_49"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_SignificantAccountingPoliciesTable_48" xlink:to="loc_dei_LegalEntityAxis_49" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_50"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_49" xlink:to="loc_dei_EntityDomain_50" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_51"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_SignificantAccountingPoliciesTable_48" xlink:to="loc_us-gaap_RangeAxis_51" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_52"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_51" xlink:to="loc_us-gaap_RangeMember_52" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_53"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_54"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_52" xlink:to="loc_us-gaap_MaximumMember_54" use="optional" order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_55"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_SignificantAccountingPoliciesTable_48" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_55" use="optional" order="8" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_56"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_57"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_58"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_SignificantAccountingPoliciesTable_48" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_58" use="optional" order="11" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_59"/> |
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| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_CustomerMember" xlink:label="loc_hdsn_CustomerMember_60"/> |
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| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_SignificantAccountingPoliciesLineItems" xlink:label="loc_hdsn_SignificantAccountingPoliciesLineItems_61"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_SignificantAccountingPoliciesTable_48" xlink:to="loc_hdsn_SignificantAccountingPoliciesLineItems_61" use="optional" order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityIncorporationDateOfIncorporation" xlink:label="loc_dei_EntityIncorporationDateOfIncorporation_62"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_SignificantAccountingPoliciesLineItems_61" xlink:to="loc_dei_EntityIncorporationDateOfIncorporation_62" use="optional" order="15" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_CustomersAccountingForTenPercentOrMoreOfNetRevenue" xlink:label="loc_hdsn_CustomersAccountingForTenPercentOrMoreOfNetRevenue_63"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredTaxAssetsNetNoncurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetNoncurrent_65"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLossCarryforwardsLimitationsOnUse" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLimitationsOnUse_66"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_67"/> |
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| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ProductionAndImportationPermissionFromGovernmentAgencyAmount" xlink:label="loc_hdsn_ProductionAndImportationPermissionFromGovernmentAgencyAmount_68"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsReceivableNet" xlink:label="loc_us-gaap_AccountsReceivableNet_69"/> |
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| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_LowerOfCostOrMarketAdjustment" xlink:label="loc_hdsn_LowerOfCostOrMarketAdjustment_70"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxesReceivable" xlink:label="loc_us-gaap_IncomeTaxesReceivable_71"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_404"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_75"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_485"/> |
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| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_RefrigerantAndCylindersMember" xlink:label="loc_hdsn_RefrigerantAndCylindersMember_496"/> |
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| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_PackagedRefrigerantsMember" xlink:label="loc_hdsn_PackagedRefrigerantsMember_497"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryLineItems" xlink:label="loc_us-gaap_InventoryLineItems_494"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_495"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_509"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_510"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LandMember" xlink:label="loc_us-gaap_LandMember_514"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BuildingMember" xlink:label="loc_us-gaap_BuildingMember_515"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BuildingImprovementsMember" xlink:label="loc_us-gaap_BuildingImprovementsMember_516"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsHeldUnderCapitalLeasesMember" xlink:label="loc_us-gaap_AssetsHeldUnderCapitalLeasesMember_518"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_VehiclesMember" xlink:label="loc_us-gaap_VehiclesMember_519"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ComputerEquipmentMember" xlink:label="loc_us-gaap_ComputerEquipmentMember_520"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_521"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_560"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_557" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_560" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_561"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_560" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_561" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_558"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_557" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentLineItems_558" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_559"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_558" xlink:to="loc_us-gaap_Depreciation_559" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
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| <presentationLink xlink:type="extended" xlink:role="http://www.hudsontech.com/role/ShorttermAndLongtermDebtAdditionalInformationDetail"> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_DisclosureDebtAdditionalInformationAbstract" xlink:label="loc_hdsn_DisclosureDebtAdditionalInformationAbstract_238"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_DebtDisclosureTable" xlink:label="loc_hdsn_DebtDisclosureTable_239"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_DisclosureDebtAdditionalInformationAbstract_238" xlink:to="loc_hdsn_DebtDisclosureTable_239" use="optional" order="1" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_240"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_DebtDisclosureTable_239" xlink:to="loc_dei_LegalEntityAxis_240" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_241"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_240" xlink:to="loc_dei_EntityDomain_241" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_242"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_DebtDisclosureTable_239" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_242" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_243"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_242" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_243" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_TermLoanMember" xlink:label="loc_hdsn_TermLoanMember_244"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_243" xlink:to="loc_hdsn_TermLoanMember_244" use="optional" order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_245"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_243" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_245" use="optional" order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_MortgageNoteMember" xlink:label="loc_hdsn_MortgageNoteMember_246"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_243" xlink:to="loc_hdsn_MortgageNoteMember_246" use="optional" order="8" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_VehicleAndEquipmentLoansMember" xlink:label="loc_hdsn_VehicleAndEquipmentLoansMember_247"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_243" xlink:to="loc_hdsn_VehicleAndEquipmentLoansMember_247" use="optional" order="9" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_248"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_DebtDisclosureTable_239" xlink:to="loc_us-gaap_DebtInstrumentAxis_248" use="optional" order="10" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_249"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentAxis_248" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_249" use="optional" order="11" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DomesticLineOfCreditMember" xlink:label="loc_us-gaap_DomesticLineOfCreditMember_250"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_249" xlink:to="loc_us-gaap_DomesticLineOfCreditMember_250" use="optional" order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_EurodollarRatesMember" xlink:label="loc_hdsn_EurodollarRatesMember_251"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_249" xlink:to="loc_hdsn_EurodollarRatesMember_251" use="optional" order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_TypesOfBaseInterestRatesAxis" xlink:label="loc_hdsn_TypesOfBaseInterestRatesAxis_252"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_DebtDisclosureTable_239" xlink:to="loc_hdsn_TypesOfBaseInterestRatesAxis_252" use="optional" order="14" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_TypesOfBaseInterestRatesDomain" xlink:label="loc_hdsn_TypesOfBaseInterestRatesDomain_253"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_TypesOfBaseInterestRatesAxis_252" xlink:to="loc_hdsn_TypesOfBaseInterestRatesDomain_253" use="optional" order="15" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_FederalFundsBaseRateMember" xlink:label="loc_hdsn_FederalFundsBaseRateMember_254"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_TypesOfBaseInterestRatesDomain_253" xlink:to="loc_hdsn_FederalFundsBaseRateMember_254" use="optional" order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_LiborRateMember" xlink:label="loc_hdsn_LiborRateMember_255"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_TypesOfBaseInterestRatesDomain_253" xlink:to="loc_hdsn_LiborRateMember_255" use="optional" order="17" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_256"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_DebtDisclosureTable_239" xlink:to="loc_us-gaap_RangeAxis_256" use="optional" order="18" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_257"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_256" xlink:to="loc_us-gaap_RangeMember_257" use="optional" order="19" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_258"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_257" xlink:to="loc_us-gaap_MinimumMember_258" use="optional" order="20" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_259"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_257" xlink:to="loc_us-gaap_MaximumMember_259" use="optional" order="21" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_260"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_DebtDisclosureTable_239" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_260" use="optional" order="22" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_261"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_260" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_261" use="optional" order="23" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_262"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_261" xlink:to="loc_us-gaap_SubsequentEventMember_262" use="optional" order="24" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_263"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_DebtDisclosureTable_239" xlink:to="loc_us-gaap_VariableRateAxis_263" use="optional" order="25" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_264"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BaseRateMember" xlink:label="loc_us-gaap_BaseRateMember_265"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EurodollarMember" xlink:label="loc_us-gaap_EurodollarMember_266"/> |
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| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_DebtDisclosureLineItems" xlink:label="loc_hdsn_DebtDisclosureLineItems_267"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_DebtDisclosureTable_239" xlink:to="loc_hdsn_DebtDisclosureLineItems_267" use="optional" order="29" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_268"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_DebtDisclosureLineItems_267" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_268" use="optional" order="30" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_269"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LineOfCreditFacilityAmountOutstanding" xlink:label="loc_us-gaap_LineOfCreditFacilityAmountOutstanding_270"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_271"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_608"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_609"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_610"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_611"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_612"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_615"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CapitalLeasesIncomeStatementInterestExpense" xlink:label="loc_us-gaap_CapitalLeasesIncomeStatementInterestExpense_613"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_FutureMinimumLeasePaymentsUnderCapitalLeasesLineItems_607" xlink:to="loc_us-gaap_CapitalLeasesIncomeStatementInterestExpense_613" use="optional" order="9" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsNetMinimumPayments1" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsNetMinimumPayments1_614"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_622"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_StockholdersEquityTable_621" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_622" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_637"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_638"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_636"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_StockholdersEquityTable_621" xlink:to="loc_us-gaap_PlanNameAxis_636" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
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| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_StockUnitMember" xlink:label="loc_hdsn_StockUnitMember_641"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_639"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_StockholdersEquityTable_621" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_639" use="optional" order="10" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_644"/> |
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| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_PlacementAgentMember" xlink:label="loc_hdsn_PlacementAgentMember_645"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromIssuanceOrSaleOfEquity" xlink:label="loc_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_625"/> |
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| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_FairValueOfSharesIssuedForServices" xlink:label="loc_hdsn_FairValueOfSharesIssuedForServices_782"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_StockholdersEquityLineItems_643" xlink:to="loc_hdsn_FairValueOfSharesIssuedForServices_782" use="optional" order="28" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
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| <presentationLink xlink:type="extended" xlink:role="http://www.hudsontech.com/role/RentExpenseDetail"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_657"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ScheduleOfRentExpenseTable" xlink:label="loc_hdsn_ScheduleOfRentExpenseTable_658"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_657" xlink:to="loc_hdsn_ScheduleOfRentExpenseTable_658" use="optional" order="1" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_PropertyLocationAxis" xlink:label="loc_hdsn_PropertyLocationAxis_659"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ScheduleOfRentExpenseTable_658" xlink:to="loc_hdsn_PropertyLocationAxis_659" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_PropertyLocationDomain" xlink:label="loc_hdsn_PropertyLocationDomain_661"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_PropertyLocationAxis_659" xlink:to="loc_hdsn_PropertyLocationDomain_661" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_AuburnWashingtonMember" xlink:label="loc_hdsn_AuburnWashingtonMember_662"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_PropertyLocationDomain_661" xlink:to="loc_hdsn_AuburnWashingtonMember_662" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_BatonRougeLouisianaMember" xlink:label="loc_hdsn_BatonRougeLouisianaMember_663"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_PropertyLocationDomain_661" xlink:to="loc_hdsn_BatonRougeLouisianaMember_663" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ChampaignIllinoisMember" xlink:label="loc_hdsn_ChampaignIllinoisMember_664"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_PropertyLocationDomain_661" xlink:to="loc_hdsn_ChampaignIllinoisMember_664" use="optional" order="6" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_CharlotteNorthCarolinaMember" xlink:label="loc_hdsn_CharlotteNorthCarolinaMember_665"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_PropertyLocationDomain_661" xlink:to="loc_hdsn_CharlotteNorthCarolinaMember_665" use="optional" order="7" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_HampsteadNewHampshireMember" xlink:label="loc_hdsn_HampsteadNewHampshireMember_666"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_PropertyLocationDomain_661" xlink:to="loc_hdsn_HampsteadNewHampshireMember_666" use="optional" order="8" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_PearlRiverNewYorkMember" xlink:label="loc_hdsn_PearlRiverNewYorkMember_667"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_PropertyLocationDomain_661" xlink:to="loc_hdsn_PearlRiverNewYorkMember_667" use="optional" order="9" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_PottsboroTexasMember" xlink:label="loc_hdsn_PottsboroTexasMember_668"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_PropertyLocationDomain_661" xlink:to="loc_hdsn_PottsboroTexasMember_668" use="optional" order="10" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_StonyPointNyMember" xlink:label="loc_hdsn_StonyPointNyMember_669"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_PropertyLocationDomain_661" xlink:to="loc_hdsn_StonyPointNyMember_669" use="optional" order="11" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_TulsaOklahomaMember" xlink:label="loc_hdsn_TulsaOklahomaMember_670"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_PropertyLocationDomain_661" xlink:to="loc_hdsn_TulsaOklahomaMember_670" use="optional" order="12" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_RentExpenseLineItems" xlink:label="loc_hdsn_RentExpenseLineItems_660"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ScheduleOfRentExpenseTable_658" xlink:to="loc_hdsn_RentExpenseLineItems_660" use="optional" order="13" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="loc_us-gaap_LeaseAndRentalExpense_752"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_RentExpenseLineItems_660" xlink:to="loc_us-gaap_LeaseAndRentalExpense_752" use="optional" order="14" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_LeaseExpirationPeriodDescription" xlink:label="loc_hdsn_LeaseExpirationPeriodDescription_753"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_RentExpenseLineItems_660" xlink:to="loc_hdsn_LeaseExpirationPeriodDescription_753" use="optional" order="15" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LeaseExpirationDate1" xlink:label="loc_us-gaap_LeaseExpirationDate1_754"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_RentExpenseLineItems_660" xlink:to="loc_us-gaap_LeaseExpirationDate1_754" use="optional" order="16" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | </presentationLink> |
| <presentationLink xlink:type="extended" xlink:role="http://www.hudsontech.com/role/FutureCommitmentsUnderOperatingLeasesDetail"> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_691"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ScheduleOfFutureCommitmentsUnderOperatingLeasesTable" xlink:label="loc_hdsn_ScheduleOfFutureCommitmentsUnderOperatingLeasesTable_692"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_691" xlink:to="loc_hdsn_ScheduleOfFutureCommitmentsUnderOperatingLeasesTable_692" use="optional" order="1" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_694"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ScheduleOfFutureCommitmentsUnderOperatingLeasesTable_692" xlink:to="loc_dei_LegalEntityAxis_694" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_695"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_694" xlink:to="loc_dei_EntityDomain_695" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_FutureCommitmentsUnderOperatingLeasesLineItems" xlink:label="loc_hdsn_FutureCommitmentsUnderOperatingLeasesLineItems_693"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ScheduleOfFutureCommitmentsUnderOperatingLeasesTable_692" xlink:to="loc_hdsn_FutureCommitmentsUnderOperatingLeasesLineItems_693" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent_712"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_FutureCommitmentsUnderOperatingLeasesLineItems_693" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent_712" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears_713"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_FutureCommitmentsUnderOperatingLeasesLineItems_693" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears_713" use="optional" order="6" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears_714"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_FutureCommitmentsUnderOperatingLeasesLineItems_693" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears_714" use="optional" order="7" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears_715"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_FutureCommitmentsUnderOperatingLeasesLineItems_693" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears_715" use="optional" order="8" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears_716"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_FutureCommitmentsUnderOperatingLeasesLineItems_693" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears_716" use="optional" order="9" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable_717"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_FutureCommitmentsUnderOperatingLeasesLineItems_693" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable_717" use="optional" order="10" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/> |
| | </presentationLink> |
| <presentationLink xlink:type="extended" xlink:role="http://www.hudsontech.com/role/CommitmentsAndContingenciesAdditionalInformationDetail"> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_DisclosureCommitmentsAndContingenciesAdditionalInformationAbstract" xlink:label="loc_hdsn_DisclosureCommitmentsAndContingenciesAdditionalInformationAbstract_719"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_CommitmentsAndContingenciesTable" xlink:label="loc_hdsn_CommitmentsAndContingenciesTable_720"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_DisclosureCommitmentsAndContingenciesAdditionalInformationAbstract_719" xlink:to="loc_hdsn_CommitmentsAndContingenciesTable_720" use="optional" order="1" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_722"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_CommitmentsAndContingenciesTable_720" xlink:to="loc_dei_LegalEntityAxis_722" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_723"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_722" xlink:to="loc_dei_EntityDomain_723" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_CommitmentsAndContingenciesLineItems" xlink:label="loc_hdsn_CommitmentsAndContingenciesLineItems_721"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_CommitmentsAndContingenciesTable_720" xlink:to="loc_hdsn_CommitmentsAndContingenciesLineItems_721" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="loc_us-gaap_LeaseAndRentalExpense_724"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_CommitmentsAndContingenciesLineItems_721" xlink:to="loc_us-gaap_LeaseAndRentalExpense_724" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_RemediationCostsIncurred" xlink:label="loc_hdsn_RemediationCostsIncurred_725"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_CommitmentsAndContingenciesLineItems_721" xlink:to="loc_hdsn_RemediationCostsIncurred_725" use="optional" order="6" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OfficersCompensation" xlink:label="loc_us-gaap_OfficersCompensation_726"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_CommitmentsAndContingenciesLineItems_721" xlink:to="loc_us-gaap_OfficersCompensation_726" use="optional" order="7" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_InsurancePolicyAmount" xlink:label="loc_hdsn_InsurancePolicyAmount_727"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_CommitmentsAndContingenciesLineItems_721" xlink:to="loc_hdsn_InsurancePolicyAmount_727" use="optional" order="8" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
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| <presentationLink xlink:type="extended" xlink:role="http://www.hudsontech.com/role/SharebasedCompensationAdditionalInformationDetail"> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_97"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_98"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_97" xlink:to="loc_dei_LegalEntityAxis_98" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_99"/> |
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| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis" xlink:label="loc_us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis_100"/> |
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| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_156" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_157" use="optional" order="8" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_158"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_157" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_158" use="optional" order="9" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_159"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_157" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_159" use="optional" order="10" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_160"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_157" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_160" use="optional" order="11" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_161"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_157" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_161" use="optional" order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_162"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_157" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_162" use="optional" order="13" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract" xlink:label="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_163"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_156" xlink:to="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_163" use="optional" order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_164"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_163" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_164" use="optional" order="15" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancellationsInPeriodWeightedAverageExercisePrice" xlink:label="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancellationsInPeriodWeightedAverageExercisePrice_165"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_163" xlink:to="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancellationsInPeriodWeightedAverageExercisePrice_165" use="optional" order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_166"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_163" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_166" use="optional" order="17" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_167"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_163" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_167" use="optional" order="18" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_168"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_163" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_168" use="optional" order="19" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel"/> |
| | </presentationLink> |
| <presentationLink xlink:type="extended" xlink:role="http://www.hudsontech.com/role/WeightedAverageContractualLifeAndExercisePriceDetail"> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_DisclosureWeightedAverageContractualLifeAndExercisePriceAbstract" xlink:label="loc_hdsn_DisclosureWeightedAverageContractualLifeAndExercisePriceAbstract_211"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsTable" xlink:label="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsTable_212"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_DisclosureWeightedAverageContractualLifeAndExercisePriceAbstract_211" xlink:to="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsTable_212" use="optional" order="1" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_213"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsTable_212" xlink:to="loc_dei_LegalEntityAxis_213" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_214"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_213" xlink:to="loc_dei_EntityDomain_214" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_215"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsTable_212" xlink:to="loc_us-gaap_PlanNameAxis_215" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_216"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameAxis_215" xlink:to="loc_us-gaap_PlanNameDomain_216" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_217"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameDomain_216" xlink:to="loc_us-gaap_EmployeeStockOptionMember_217" use="optional" order="6" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsLineItems" xlink:label="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsLineItems_218"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsTable_212" xlink:to="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsLineItems_218" use="optional" order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_219"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsLineItems_218" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_219" use="optional" order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_220"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_219" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_220" use="optional" order="9" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedNumber" xlink:label="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedNumber_221"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_219" xlink:to="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedNumber_221" use="optional" order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" xlink:label="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_222"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsLineItems_218" xlink:to="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_222" use="optional" order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_223"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_222" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_223" use="optional" order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_224"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_222" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_224" use="optional" order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract" xlink:label="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_225"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsLineItems_218" xlink:to="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_225" use="optional" order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_226"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_225" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_226" use="optional" order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedWeightedAverageExercisePrice" xlink:label="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedWeightedAverageExercisePrice_227"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_225" xlink:to="loc_hdsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedWeightedAverageExercisePrice_227" use="optional" order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | </presentationLink> |
| <presentationLink xlink:type="extended" xlink:role="http://www.hudsontech.com/role/IntrinsicValueDetail"> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_IntrinsicValueAbstract" xlink:label="loc_hdsn_IntrinsicValueAbstract_229"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsTable" xlink:label="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsTable_230"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_IntrinsicValueAbstract_229" xlink:to="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsTable_230" use="optional" order="1" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_231"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsTable_230" xlink:to="loc_dei_LegalEntityAxis_231" use="optional" order="2" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_232"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_231" xlink:to="loc_dei_EntityDomain_232" use="optional" order="3" preferredLabel="http://www.xbrl.org/2003/role/label"/> |
| | <loc xlink:type="locator" xlink:href="hdsn-20131231.xsd#hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsLineItems" xlink:label="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsLineItems_233"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsTable_230" xlink:to="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsLineItems_233" use="optional" order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_234"/> |
| | <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_hdsn_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsLineItems_233" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_234" use="optional" order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/> |
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