CATALYTIC COMPOSITION FOR SELECTIVE HYDROGENATION OF OLEFINIC DOUBLE BONDS AND METHOD FOR SELECTIVE HYDROGENATION Russian patent published in 2002 - IPC

FIELD: hydrogenation-dehydrogenation catalysts. SUBSTANCE: objective if invention is selective hydrogenation of olefinic double bonds present in diene/vinylbenzene copolymers. Such hydrogenation proceeds in presence of catalytic composition, which is prepared by reaction of following reactants: (i) bis(cyclopentadienyl)titanium of the general formula (C₅H₅)₂ Ti(R)(R₁), wherein R and R₁, identical or different, are halogens; (ii) organometallic derivative of general formula M(R₂)(R₃) wherein M is zinc or magnesium and R₂ and R₃, identical or different, are C1-C16-alkyls; and (iii) modifier selected from aromatic hydrocarbons. Compound (i) is dispersed in one or more nondissolving diluents. EFFECT: simplified preparation of catalytic composition and increased its catalytic activity. 15 cl, 4 tbl, 13 ex