Abstract A process for the highly selective hydrogenation of polyunsaturated fatty acids and their triglycerides to the monounsaturated compounds using a homogenous Pd(II) catalyst in an ion-exchange resin and a process for improving the carrier properties for this and other reactions of ion-exchange resins are described. The resin''s properties are improved by treatment with base or acid, without changing the number of active sites by more than 25% until the percentage of active sites readily accessible to large molecules is increased by at least 20%. In the hydrogenation process the Pd(II) is introduced into the saltform of cation-exchange resins and into the hydroxyl or neutral form of anion-exchange resins.
A PROCESS FOR HYDROGENATING POLYUNSATURATED FATTY ACIDS AND THEIR TRIGLYCERIDE ESTERS AT ABOUT O C TO ABOUT 100 C USING ABOUT 1 TO ABOUT 5 ATMS. HYDROGEN IN THE PRESENCE OF A POLAR SOLVENT AND A SUPPORTED HEAVY-METAL CATALYST IN WHICH THE HEAVY-METAL IS PD(II), THE CATALYST-SUPPORT IS AN ION-EXCHANGE RESIN CONSISTING ESSENTIALLY OF A POLYSTYRENE MATRIX CROSSLINKED WITH DIVINYL BENZENE AND AT LEAST 2.0 MEQ/G ACTIVE SITES READILY ACCESSIBLE TO LARGE MOLECULES AND THE PD (II) HAS BEEN INTRODUCED INTO THE SALT-FORM OF THE RESIN WHEN THE RESIN IS A CATIONEXCHANGE AND INTO THE HYDROXYL OR NEUTRAL FORM WHEN THE RESIN IS AN ANION-EXCHANGE RESIN.
Claim 2
Dependent Claim
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A PROCESS FOR HYDROGENATING POLYUNSATURATED FATTY ACIDS AND THEIR TRIGLYCERIDE ESTERS AT ABOUT O C TO ABOUT 100 C USING ABOUT 1 TO ABOUT 5 ATMS. HYDROGEN IN THE PRESENCE OF A POLAR SOLVENT AND A SUPPORTED HEAVY-METAL CATALYST IN WHICH THE HEAVY-METAL IS PD(II), THE CATALYST-SUPPORT IS AN ION-EXCHANGE RESIN CONSISTING ESSENTIALLY OF A POLYSTYRENE MATRIX CROSSLINKED WITH DIVINYL BENZENE AND AT LEAST 2.0 MEQ/G ACTIVE SITES READILY ACCESSIBLE TO LARGE MOLECULES AND THE PD (II) HAS BEEN INTRODUCED INTO THE SALT-FORM OF THE RESIN WHEN THE RESIN IS A CATIONEXCHANGE AND INTO THE HYDROXYL OR NEUTRAL FORM WHEN THE RESIN IS AN ANION-EXCHANGE RESIN.