Patent ID: 6281397
Filing Date: 2001-08-28
Classification: B01J,C07B,C07C

Abstract:
A process for the selective hydrogenation of an olefinic double bond of an olefinically unsaturated substrate, comprising:contacting said substrate with hydrogen;reacting said substrate with said hydrogen in the presence of a catalytic composition comprising the reaction product between:(A) at least one complex of a transition metal having formula (I):M(R.sup.1)(R.sup.2)(R.sup.3)(R.sup.4) (I)whereinM is a metal selected from the group consisting of titanium and zirconium;each of the radicals R.sup.1, R.sup.2, R.sup.3 or R.sup.4 independently represents an anionic organic group .sigma.-bonded to M or an anionic inorganic group .sigma.-bonded to M;wherein at least one of said radicals R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is an organic group; and(B) at least one organometallic magnesium compound of formula (II):Mg(R.sup.5).sub.n (R.sup.6).sub.(2-n) (II)wherein R.sup.5 or R.sup.6 each independently represent an aliphatic or aromatic hydrocarbon group having from 1 to 20 carbon atoms; andwherein n is a decimal number between 0 and 2.0.