Patent ID: 6369277
Filing Date: 2002-04-09
Classification: B01J,C07C

Abstract:
A process of selectively hydrogenating an &agr;,&bgr;-unsaturated carbonyl compound of the formula (I) where R1 is saturated C1-40-hydrocarbyl, unsaturated hydrocarbyl or a substituted or unsubstituted aromatic radical containing moiety, and R2, R3 and R4, independently of one another, are hydrogen or a C1- to C4-alkyl group, in the liquid phase to a saturated carbonyl compound of the formula (II) with hydrogen in the presence of a pulverulent palladium and/or rhodium catalyst and in the presence of an organic base, which comprises:conducting the hydrogenation in a packed bubble column reactor in which product is recycled and hydrogen gas is recirculated.