Process for producing a silane or siloxane compound containing a cycloalkyl ring

Claim 1

A process for producing a silane or siloxane compound containing a cycloalkyl ring by catalytic hydrogenation, this process comprising hydrogenating, in the presence of a Raney nickel catalyst modified with chromium wherein the chromium content is from about 1 to 10% by weight of the nickel, a silane or siloxane compound containing at least an aromatic or heteroaromatic ring and having formula (I): ##STR5## wherein X is an aryl, alkylaryl or arylalkyl group having from 6 to 20 carbon atoms or the radical ##STR6## wherein R 4 and R 5 are the same or different and are each an alkylene radical containing from 1 to 20 carbon atoms; R 6 is an alkyl, alkoxy, alcohol, acid or ester radical containing from 1 to 20 carbon atoms; A is a heteroatom selected from the group consisting of oxygen, sulfur, nitrogen; m, n and p are zero or a whole number from 1 to 10; and R 1 , R 2 and R 3 are the same or different and have the same definition as X or may be a hydrogen atom, an alkyl or alkylene radical containing from 1 to 20 carbon atoms, a linear or branched alkyl radical having from 1 to 20 carbon atoms and containing one or more alkoxy, carbonyl or carboxyl groups, or the group N(R") 2 in which R" is a hydrogen atom or an alkyl radical containing from 1 to 20 carbon atoms.