Patent ID: 6083468
Filing Date: 2000-07-04
Classification: B01J,C01B

Abstract:
A process for producing a partially poisoned, supported platinum hydrogenation catalyst, which process comprisestreating an aqueous solution of a platinum compound comprising platinum in an oxidation state of not less than two with an effective amount of a compound of the formula I ##STR3## where X, Y and Z are identical or different and denote hydrogen, C.sub.1 -C.sub.18 -alkyl, C.sub.5 -C.sub.10 -cycloalkyl, halogen, hydroxyl, C.sub.1 -C.sub.6 -alkoxy or --NR'R"", and R, R' and R"" are identical or different and denote hydrogen, C.sub.1 -C.sub.18 -alkyl or C.sub.5 -C.sub.10 -cycloalkyl, to partially poison the platinum catalyst and reducing the treated platinum compound in the presence of a carbon-containing support.