COMPLEXES ORGANOMETALLIQUES COMPORTANT DES LIGANDS PHOSPHONITES ET LEUR UTILISATION POUR CATALYSER L'OLIGOMERISATION DES OLEFINES

摘要

A catalytic composition comprises a mixture containing a nickel complex containing a phosphonite ligand and a hydrocarbyl aluminum compound, in which the aluminum/nickel ratio is less than or equal to 8/1. A catalytic composition containing a mixture of a nickel (Ni) complex containing a phosphonite ligand, a hydrocarbyl aluminum (Al) compound consisting of a tris(hydrocarbyl)aluminum or hydrocarbyl aluminum chloride or bromide of general formula AlR''mY3-m (in which R'' is 1-6C hydrocarbyl , Y is Cl or Br and m is 1 - 3) and aluminoxanes. The Al /Ni ratio is less than or equal to 8 / 1. An Independent claim is also included for the oligomerization process using the catalytic composition.