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Plural stage hydrogenation of dialkyl terephthalate using palladium and then copper chromite

  • US 3,334,149 A
  • Filed: 07/21/1964
  • Issued: 08/01/1967
  • Est. Priority Date: 07/21/1964
  • Status: Expired due to Term
First Claim
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1. A PROCESS FOR THE PREPARATION OF 1,4-CYCLOHEXANEDIMETHANOL WHICH COMPRISES REACTING A DIALKYL TEREPHTHALATE WITH HYDROGEN IN A FIRST HYDROGENATION STAGE IN THE PRESENCE OF A PALLADIUM HYDROGENATION CATALYST UNDER HYDROGENATION CONDITIONS, PASSING EFFLUENT FROM SAID FIRST HYDROGENATION STAGE THROUGH A SECOND HYDROGENATION STAGE IN THE PRESENCE OF A COPPER CHROMITE HYDROGENATION CATALYST UNDER HYDROGENATION CONDITIONS, AND RECOVERING 1,4-CYCLOHEXNEDIMETHANOL FROM SAID SECOND HYDROGENATION STAGE.

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