Process for the hydrogenation of olefins or polymers using a catalyst based on a Ti, Zr or Hf complex

摘要

The present invention relates to a catalyst composition which comprises at least: a) a metal compound cation of the formula Ä(A)(B)ML+Ü wherein M represents titanium, zirconium, or hafnium, wherein A and B represent ligands with structure I or II CHEM in which R1 independently represents the same or different hydrocarbyl groups optionally containing heteroatoms, and R3 independently represents the same or different hydrocarbyl groups optionally containing heteroatoms, or a halide, and in which R substituents may be shared between A and B to provide a bridge, wherein m is an integer from 0-5, p is an integer from 0-4, and q is an integer from 0-3, wherein L represents hydrogen or hydrocarbyl group optionally containing heteroatoms, with the proviso that if A and B are both ligands with structure I or II, at least one of m, p or q is at least 1, and b) a non-coordinating stable anion. The present invention further relates to a process for the preparation of a catalyst composition and to a process for the catalytic hydrogenation of olefins, oligomers, polymers or copolymers.