Catalytic composition for the hydrogenation of olefinically unsaturated compounds

摘要

A catalytic composition effective in the selective hydrogenation of olefinic double bonds, comprising the reaction product between: (A) at least one complex of a transition metal having the following general formula (I): M(R<1>)(R<2>)(R<3>)(R<4>) wherein: M is selected from titanium and zirconium, preferably titanium; each of the radicals R<1>, R<2>, R<3> or R<4>, independently, represents an organic or inorganic group of an anionic nature sigma -bound to M, on the condition that at least one, and preferablyat at least two, of these radicals is an organic group; and (B) at least one organometallic compound of magnesium having the following formula (II): Mg(R<5>)n(R<6>)(2-n) wherein: R<5> or R<6> each independently represent an aliphatic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, and "n" is a decimal number between 0 and 2.0. Said catalytic composition advantageously and selectively promotes the direct hydrogenation of double bonds of an olefinic type, with high rates and with a reduced formation of isomers.