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| | | <link:roleType id="StockholdersEquityReclassificationsoutofAOCIDetails" roleURI="http://www.ecovyst.com/role/StockholdersEquityReclassificationsoutofAOCIDetails"> |
| <link:definition> 240374022 - Disclosure - Stockholders' Equity - Reclassifications out of AOCI (Details) </link:definition> |
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| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType id="StockRepurchaseProgramDetails" roleURI="http://www.ecovyst.com/role/StockRepurchaseProgramDetails"> |
| <link:definition> 240384023 - Disclosure - Stock Repurchase Program (Details) </link:definition> |
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| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType id="DividendsPaidDetails" roleURI="http://www.ecovyst.com/role/DividendsPaidDetails"> |
| <link:definition> 240394024 - Disclosure - Dividends Paid (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType id="OtherOperatingExpenseNet" roleURI="http://www.ecovyst.com/role/OtherOperatingExpenseNet"> |
| <link:definition> 210401010 - Disclosure - Other Operating Expense, Net </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="OtherOperatingExpenseNetTables" roleURI="http://www.ecovyst.com/role/OtherOperatingExpenseNetTables"> |
| <link:definition> 230413007 - Disclosure - Other Operating Expense, Net (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="OtherOperatingExpenseNetDetails" roleURI="http://www.ecovyst.com/role/OtherOperatingExpenseNetDetails"> |
| <link:definition> 240424025 - Disclosure - Other Operating Expense, Net (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType id="InventoriesNet" roleURI="http://www.ecovyst.com/role/InventoriesNet"> |
| <link:definition> 210431011 - Disclosure - Inventories, Net </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="InventoriesTables" roleURI="http://www.ecovyst.com/role/InventoriesTables"> |
| <link:definition> 230443008 - Disclosure - Inventories (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="InventoriesDetails" roleURI="http://www.ecovyst.com/role/InventoriesDetails"> |
| <link:definition> 240454026 - Disclosure - Inventories (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="InventoriesDetails_1" roleURI="http://www.ecovyst.com/role/InventoriesDetails_1"> |
| <link:definition> 240454026 - Disclosure - Inventories (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="InventoriesNetNarrativesDetails" roleURI="http://www.ecovyst.com/role/InventoriesNetNarrativesDetails"> |
| <link:definition> 240464027 - Disclosure - Inventories, Net - Narratives (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType id="InvestmentsinAffiliatedCompanies" roleURI="http://www.ecovyst.com/role/InvestmentsinAffiliatedCompanies"> |
| <link:definition> 210471012 - Disclosure - Investments in Affiliated Companies </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="InvestmentsinAffiliatedCompaniesTables" roleURI="http://www.ecovyst.com/role/InvestmentsinAffiliatedCompaniesTables"> |
| <link:definition> 230483009 - Disclosure - Investments in Affiliated Companies (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="InvestmentsinAffiliatedCompaniesNarrativesDetails" roleURI="http://www.ecovyst.com/role/InvestmentsinAffiliatedCompaniesNarrativesDetails"> |
| <link:definition> 240494028 - Disclosure - Investments in Affiliated Companies - Narratives (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="InvestmentsinAffiliatedCompaniesOwnershipPercentageDetails" roleURI="http://www.ecovyst.com/role/InvestmentsinAffiliatedCompaniesOwnershipPercentageDetails"> |
| <link:definition> 240504029 - Disclosure - Investments in Affiliated Companies - Ownership Percentage (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="InvestmentsinAffiliatedCompaniesSummarizedBalanceSheetDetails" roleURI="http://www.ecovyst.com/role/InvestmentsinAffiliatedCompaniesSummarizedBalanceSheetDetails"> |
| <link:definition> 240514030 - Disclosure - Investments in Affiliated Companies - Summarized Balance Sheet (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="InvestmentsinAffiliatedCompaniesSummarizedIncomeStatementDetails" roleURI="http://www.ecovyst.com/role/InvestmentsinAffiliatedCompaniesSummarizedIncomeStatementDetails"> |
| <link:definition> 240524031 - Disclosure - Investments in Affiliated Companies - Summarized Income Statement (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="InvestmentsinAffiliatedCompaniesRollforwardDetails" roleURI="http://www.ecovyst.com/role/InvestmentsinAffiliatedCompaniesRollforwardDetails"> |
| <link:definition> 240534032 - Disclosure - Investments in Affiliated Companies - Rollforward (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="PropertyPlantandEquipment" roleURI="http://www.ecovyst.com/role/PropertyPlantandEquipment"> |
| <link:definition> 210541013 - Disclosure - Property, Plant and Equipment </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="PropertyPlantandEquipmentTables" roleURI="http://www.ecovyst.com/role/PropertyPlantandEquipmentTables"> |
| <link:definition> 230553010 - Disclosure - Property, Plant and Equipment (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="PropertyPlantandEquipmentDetails" roleURI="http://www.ecovyst.com/role/PropertyPlantandEquipmentDetails"> |
| <link:definition> 240564033 - Disclosure - Property, Plant and Equipment (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="PropertyPlantandEquipmentNarrativesDetails" roleURI="http://www.ecovyst.com/role/PropertyPlantandEquipmentNarrativesDetails"> |
| <link:definition> 240574034 - Disclosure - Property, Plant and Equipment - Narratives (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="Leases" roleURI="http://www.ecovyst.com/role/Leases"> |
| <link:definition> 210581014 - Disclosure - Leases </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="LeasesTables" roleURI="http://www.ecovyst.com/role/LeasesTables"> |
| <link:definition> 230593011 - Disclosure - Leases (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="LeasesNarrativesDetails" roleURI="http://www.ecovyst.com/role/LeasesNarrativesDetails"> |
| <link:definition> 240604035 - Disclosure - Leases - Narratives (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="LeasesRightofUseLeaseAssetsandLeaseLiabilitiesDetails" roleURI="http://www.ecovyst.com/role/LeasesRightofUseLeaseAssetsandLeaseLiabilitiesDetails"> |
| <link:definition> 240614036 - Disclosure - Leases - Right-of-Use Lease Assets and Lease Liabilities (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="LeasesRemainingAverageWeightedAverageLeaseTermandDiscountRatesDetails" roleURI="http://www.ecovyst.com/role/LeasesRemainingAverageWeightedAverageLeaseTermandDiscountRatesDetails"> |
| <link:definition> 240624037 - Disclosure - Leases - Remaining Average Weighted Average Lease Term and Discount Rates (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="LeasesLeaseMaturityScheduleASC842Details" roleURI="http://www.ecovyst.com/role/LeasesLeaseMaturityScheduleASC842Details"> |
| <link:definition> 240634038 - Disclosure - Leases - Lease Maturity Schedule - ASC 842 (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="LeasesOtherLeaseInformationDetails" roleURI="http://www.ecovyst.com/role/LeasesOtherLeaseInformationDetails"> |
| <link:definition> 240644039 - Disclosure - Leases - Other Lease Information (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="ReportableSegments" roleURI="http://www.ecovyst.com/role/ReportableSegments"> |
| <link:definition> 210651015 - Disclosure - Reportable Segments </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="ReportableSegmentsTables" roleURI="http://www.ecovyst.com/role/ReportableSegmentsTables"> |
| <link:definition> 230663012 - Disclosure - Reportable Segments (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="ReportableSegmentsNarrativesDetails" roleURI="http://www.ecovyst.com/role/ReportableSegmentsNarrativesDetails"> |
| <link:definition> 240674040 - Disclosure - Reportable Segments - Narratives (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="ReportableSegmentsSummaryFinancialInformationbyReportableSegmentDetails" roleURI="http://www.ecovyst.com/role/ReportableSegmentsSummaryFinancialInformationbyReportableSegmentDetails"> |
| <link:definition> 240684041 - Disclosure - Reportable Segments - Summary Financial Information by Reportable Segment (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="ReportableSegmentsReconciliationofNetIncometoAdjustedEBITDADetails" roleURI="http://www.ecovyst.com/role/ReportableSegmentsReconciliationofNetIncometoAdjustedEBITDADetails"> |
| <link:definition> 240694042 - Disclosure - Reportable Segments - Reconciliation of Net Income to Adjusted EBITDA (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="ReportableSegmentsCapitalExpendituresDetails" roleURI="http://www.ecovyst.com/role/ReportableSegmentsCapitalExpendituresDetails"> |
| <link:definition> 240704043 - Disclosure - Reportable Segments - Capital Expenditures (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="ReportableSegmentsSalesbyGeographyDetails" roleURI="http://www.ecovyst.com/role/ReportableSegmentsSalesbyGeographyDetails"> |
| <link:definition> 240714044 - Disclosure - Reportable Segments - Sales by Geography (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="ReportableSegmentsAssetsbyGeographyDetails" roleURI="http://www.ecovyst.com/role/ReportableSegmentsAssetsbyGeographyDetails"> |
| <link:definition> 240724045 - Disclosure - Reportable Segments - Assets by Geography (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="GoodwillandOtherIntangibleAssets" roleURI="http://www.ecovyst.com/role/GoodwillandOtherIntangibleAssets"> |
| <link:definition> 210731016 - Disclosure - Goodwill and Other Intangible Assets </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="GoodwillandOtherIntangibleAssetsGoodwillandOtherIntangibleAssetsTables" roleURI="http://www.ecovyst.com/role/GoodwillandOtherIntangibleAssetsGoodwillandOtherIntangibleAssetsTables"> |
| <link:definition> 230743013 - Disclosure - Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="GoodwillandOtherIntangibleAssetsGoodwillRollforwardDetails" roleURI="http://www.ecovyst.com/role/GoodwillandOtherIntangibleAssetsGoodwillRollforwardDetails"> |
| <link:definition> 240754046 - Disclosure - Goodwill and Other Intangible Assets - Goodwill Rollforward (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="GoodwillandOtherIntangibleAssetsNarrativesDetails" roleURI="http://www.ecovyst.com/role/GoodwillandOtherIntangibleAssetsNarrativesDetails"> |
| <link:definition> 240764047 - Disclosure - Goodwill and Other Intangible Assets - Narratives (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="GoodwillandOtherIntangibleAssetsScheduleofIntangibleAssetsDetails" roleURI="http://www.ecovyst.com/role/GoodwillandOtherIntangibleAssetsScheduleofIntangibleAssetsDetails"> |
| <link:definition> 240774048 - Disclosure - Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="GoodwillandOtherIntangibleAssetsFutureAmortizationDetails" roleURI="http://www.ecovyst.com/role/GoodwillandOtherIntangibleAssetsFutureAmortizationDetails"> |
| <link:definition> 240784049 - Disclosure - Goodwill and Other Intangible Assets - Future Amortization (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="AccruedLiabilities" roleURI="http://www.ecovyst.com/role/AccruedLiabilities"> |
| <link:definition> 210791017 - Disclosure - Accrued Liabilities </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="AccruedLiabilitiesAccruedLiabilitiesTables" roleURI="http://www.ecovyst.com/role/AccruedLiabilitiesAccruedLiabilitiesTables"> |
| <link:definition> 230803014 - Disclosure - Accrued Liabilities Accrued Liabilities (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="AccruedLiabilitiesAccruedLiabilitiesDetails" roleURI="http://www.ecovyst.com/role/AccruedLiabilitiesAccruedLiabilitiesDetails"> |
| <link:definition> 240814050 - Disclosure - Accrued Liabilities Accrued Liabilities (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="LongtermDebt" roleURI="http://www.ecovyst.com/role/LongtermDebt"> |
| <link:definition> 210821018 - Disclosure - Long-term Debt </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="LongtermDebtTables" roleURI="http://www.ecovyst.com/role/LongtermDebtTables"> |
| <link:definition> 230833015 - Disclosure - Long-term Debt (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType id="LongtermDebtDetails" roleURI="http://www.ecovyst.com/role/LongtermDebtDetails"> |
| <link:definition> 240844051 - Disclosure - Long-term Debt (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
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| | | <link:roleType id="LongtermDebtDetails_1" roleURI="http://www.ecovyst.com/role/LongtermDebtDetails_1"> |
| <link:definition> 240844051 - Disclosure - Long-term Debt (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="LongtermDebtSeniorSecuredCreditFacilitiesDetails" roleURI="http://www.ecovyst.com/role/LongtermDebtSeniorSecuredCreditFacilitiesDetails"> |
| <link:definition> 240854052 - Disclosure - Long-term Debt - Senior Secured Credit Facilities (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="LongtermDebtSecuredandUnsecuredNotesDetails" roleURI="http://www.ecovyst.com/role/LongtermDebtSecuredandUnsecuredNotesDetails"> |
| <link:definition> 240864053 - Disclosure - Long-term Debt - Secured and Unsecured Notes (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="LongtermDebtAggregateLongtermDebtMaturitiesDetails" roleURI="http://www.ecovyst.com/role/LongtermDebtAggregateLongtermDebtMaturitiesDetails"> |
| <link:definition> 240874054 - Disclosure - Long-term Debt - Aggregate Long-term Debt Maturities (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType id="OtherLongtermLiabilities" roleURI="http://www.ecovyst.com/role/OtherLongtermLiabilities"> |
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| <xs:element id="ecvt_PQHoldingsEcoServicesMember" abstract="true" name="PQHoldingsEcoServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_LesseeRemainingLeaseTerm" abstract="false" name="LesseeRemainingLeaseTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/> |
| <xs:element id="ecvt_RightofUseAssetsObtainedinExchangeforNewLeaseLiabilitiesNonCashAbstract" abstract="true" name="RightofUseAssetsObtainedinExchangeforNewLeaseLiabilitiesNonCashAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/> |
| <xs:element id="ecvt_FivePointSevenFivePercentSeniorUnsecuredNotesdue2025Member" abstract="true" name="FivePointSevenFivePercentSeniorUnsecuredNotesdue2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_A2016TermLoanFacilityMember" abstract="true" name="A2016TermLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_LineofCreditFacilityPotentialCommitmentFeePercentage" abstract="false" name="LineofCreditFacilityPotentialCommitmentFeePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/> |
| <xs:element id="ecvt_SharebasedCompensationAwardTrancheFourMember" abstract="true" name="SharebasedCompensationAwardTrancheFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_SummaryofSignificantAccountingPoliciesTableLineItems" abstract="true" name="SummaryofSignificantAccountingPoliciesTableLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/> |
| <xs:element id="ecvt_ReclassificationFromAOCIAttributableToDisposalOfBusiness" abstract="false" name="ReclassificationFromAOCIAttributableToDisposalOfBusiness" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_InventoryValuationInFIFOLowerThanLIFO" abstract="false" name="InventoryValuationInFIFOLowerThanLIFO" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_RevenueShippingAndHandlingPolicyPolicyTextBlock" abstract="false" name="RevenueShippingAndHandlingPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/> |
| <xs:element id="ecvt_DefinedBenefitPlanAmountsforAssetLiabilityandAccumulatedOtherComprehensiveIncomeRecognizedinStatementofFinancialPosition" abstract="false" name="DefinedBenefitPlanAmountsforAssetLiabilityandAccumulatedOtherComprehensiveIncomeRecognizedinStatementofFinancialPosition" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_CashandRestrictedCashReconciliationAbstract" abstract="true" name="CashandRestrictedCashReconciliationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/> |
| <xs:element id="ecvt_PerformanceStockUnitFairValueAssumptionsExpectedDividendRate" abstract="false" name="PerformanceStockUnitFairValueAssumptionsExpectedDividendRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/> |
| <xs:element id="ecvt_DisposalGroupIncludingDiscontinuedOperationNetAssetsDerecognizedOnDisposal" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationNetAssetsDerecognizedOnDisposal" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_DeferredTaxLiabilitiesOperatingLeaseRightofuseAssets" abstract="false" name="DeferredTaxLiabilitiesOperatingLeaseRightofuseAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_TransitionServicesAgreementNumberOfExtensionsAvailable" abstract="false" name="TransitionServicesAgreementNumberOfExtensionsAvailable" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/> |
| <xs:element id="ecvt_NetGainLossOnDispositionOfAssets" abstract="false" name="NetGainLossOnDispositionOfAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_Operatingandfinancerightofuseleaseassetstotal" abstract="false" name="Operatingandfinancerightofuseleaseassetstotal" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_IndustrialandChemicalProcessMember" abstract="true" name="IndustrialandChemicalProcessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_January2022InterestRateCapExpiringOctober2025Member" abstract="true" name="January2022InterestRateCapExpiringOctober2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_A2021MonteCarloSimulationMember" abstract="true" name="A2021MonteCarloSimulationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_PerformanceStockUnitFairValueAssumptionsRiskFreeInterestRate" abstract="false" name="PerformanceStockUnitFairValueAssumptionsRiskFreeInterestRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/> |
| <xs:element id="ecvt_ActuarialGainLossChangesduetoDiscountRates" abstract="false" name="ActuarialGainLossChangesduetoDiscountRates" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_EcoServicesHourlyPensionPlanMember" abstract="true" name="EcoServicesHourlyPensionPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_TransitionServicesAgreementTerm" abstract="false" name="TransitionServicesAgreementTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/> |
| <xs:element id="ecvt_PerformanceStockUnitFairValueAssumptionsExpectedTerm" abstract="false" name="PerformanceStockUnitFairValueAssumptionsExpectedTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/> |
| <xs:element id="ecvt_OperatingandFinanceLeaseLiabilitiesTotal" abstract="false" name="OperatingandFinanceLeaseLiabilitiesTotal" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization" abstract="false" name="AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_AccruedCompensationandBonusCurrent" abstract="false" name="AccruedCompensationandBonusCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_PerformanceStockUnitFairValueAssumptionsExpectedVolatilityRate" abstract="false" name="PerformanceStockUnitFairValueAssumptionsExpectedVolatilityRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/> |
| <xs:element id="ecvt_SparePartsPolicyPolicyTextBlock" abstract="false" name="SparePartsPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/> |
| <xs:element id="ecvt_PaymentsUnderFinancingArrangement" abstract="false" name="PaymentsUnderFinancingArrangement" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_January2022InterestRateCapsMember" abstract="true" name="January2022InterestRateCapsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_OtherInsurancePoliciesMember" abstract="true" name="OtherInsurancePoliciesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_ProceedsFromFailedSaleLeaseback" abstract="false" name="ProceedsFromFailedSaleLeaseback" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_ProductsMember" abstract="true" name="ProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentRecognizedIdentifiableAssetsAcquiredGoodwillandLiabilitiesAssumedNet" abstract="false" name="BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentRecognizedIdentifiableAssetsAcquiredGoodwillandLiabilitiesAssumedNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_ProvisionToReturnAdjustmentRecognized" abstract="false" name="ProvisionToReturnAdjustmentRecognized" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_DisposalGroupsIncludingDiscontinuedOperationsDisclosureOfPerformanceMaterialsTextBlock" abstract="false" name="DisposalGroupsIncludingDiscontinuedOperationsDisclosureOfPerformanceMaterialsTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/> |
| <xs:element id="ecvt_EquityMethodInvestmentsChargesRelatedtoPurchaseAccounting" abstract="false" name="EquityMethodInvestmentsChargesRelatedtoPurchaseAccounting" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_DisposalGroupIncludingDiscontinuedOperationLeaseLiabilitiesCurrent" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationLeaseLiabilitiesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanTax" abstract="false" name="AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanTax" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_IncomeTaxBenefitOnTransactionCostsAndStockBasedCompensationExpenseOnly" abstract="false" name="IncomeTaxBenefitOnTransactionCostsAndStockBasedCompensationExpenseOnly" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_DefinedBenefitPlanBenefitObligationPremiumsPaid" abstract="false" name="DefinedBenefitPlanBenefitObligationPremiumsPaid" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_BusinessCombinationsMember" abstract="true" name="BusinessCombinationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccountsPayable" abstract="false" name="BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccountsPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_ActuarialGainLossChangesduetoDemographicExperience" abstract="false" name="ActuarialGainLossChangesduetoDemographicExperience" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_RestrictedStockRestrictedStockUnitsRSUsandPerformanceStockUnitsPSUsMember" abstract="true" name="RestrictedStockRestrictedStockUnitsRSUsandPerformanceStockUnitsPSUsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_ForeignCurrencyAdjustmentsRelatedtoEquityMethodInvestments" abstract="false" name="ForeignCurrencyAdjustmentsRelatedtoEquityMethodInvestments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_Chem32Member" abstract="true" name="Chem32Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_DebtInstrumentCovenantFixedChargeCoverageRatioMinimum" abstract="false" name="DebtInstrumentCovenantFixedChargeCoverageRatioMinimum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/> |
| <xs:element id="ecvt_A2020TermLoanFacilityMember" abstract="true" name="A2020TermLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_A2020MonteCarloSimulationMember" abstract="true" name="A2020MonteCarloSimulationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_January2022InterestRateCapExpiringOctober2024Member" abstract="true" name="January2022InterestRateCapExpiringOctober2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_SubsurfaceRemediationAndWetlandsManagementMember" abstract="true" name="SubsurfaceRemediationAndWetlandsManagementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| <xs:element id="ecvt_PrincipalPaymentsUnderFinanceLeasesAndFinancingObligationsIncludedInFinancingCashFlows" abstract="false" name="PrincipalPaymentsUnderFinanceLeasesAndFinancingObligationsIncludedInFinancingCashFlows" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_AccumulatedDefinedBenefitPlansAdjustmentSettlementGain" abstract="false" name="AccumulatedDefinedBenefitPlansAdjustmentSettlementGain" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_EquityMethodInvestmentAmortizationExpense" abstract="false" name="EquityMethodInvestmentAmortizationExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_DefinedBenefitPlanPlanAssetsPremiumsPaid" abstract="false" name="DefinedBenefitPlanPlanAssetsPremiumsPaid" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/> |
| <xs:element id="ecvt_PermitsMember" abstract="true" name="PermitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/> |
| </xs:schema> |