NOVEL NICKEL-BASED CATALYTIC COMPOSITION AND NICKEL COMPLEX PHOSPHINE-LIKE LIGAND AND USE THEREOF IN OLEFIN OLIGOMERIZATION PROCESS

摘要

The invention relates to a catalytic composition comprising: at least one oxidation state nickel precursor (+ II) and containing a phosphine ligand complexed with nickel, at least one Lewis base, and at least one activating agent chosen from the group formed by the chlorinated or brominated hydrocarbylaluminum compounds, taken alone or in a mixture, such that the molar ratio of the Lewis base group and the nickel complexed phosphine ligand of the composition to the nickel is between 5 and 30. The invention also relates to the use of said catalytic composition.