Catalyst Components Based on Fulvene Complexes
AssigneesTotal Petrochemicals Research Feluy, Centre National de la Recherche Scientifique (CNRS)
InventorsClement Lansalot-MaTras, Olivier Lavastre, Sabine Sirol
Life of this patent
Estimating the term…
Abstract
The present invention discloses metallic complexes based on hydroxyl-carbonyl fulvene ligands, their method of preparation and their use in the oligomerisation or polymerisation of ethylene and alpha-olefins.
Claims14
A method for preparing a metallic complex that comprises the steps of:
- a) providing a metallic precursor MZn wherein M is a metal Group 6 to 11 of the Periodic Table, Z is a negative counter-anion and n is the valence of M;
- b) complexing the metallic precursor of step a) with a ligand of formula
- wherein both R are the same and are selected from aryl, alkyl arylalkyl, alkylaryl having at most 20 carbon atoms or groups containing heteroatoms and Y is an element Group 1 from the Periodic Table.
- c) retrieving a metallic complex.
The method of any one of the preceding claims wherein M is CrII, CrIII or Ni.
The method of any one of the preceding claims wherein Z is halogen or acetate.
The method of any one of the preceding claims wherein the ligand is deprotonated with a base prior to complexation step b).
A method for preparing an active catalyst system that comprises the steps of:
- a) providing a hydroxyl-carbonyl fulvene ligand;
- b) optionally deprotonating the ligand of step a) with a base;
- c) complexing the ligand of step a) or of step b) with a metallic salt MZn in a solvent;
- d) retrieving a catalyst component;
- e) optionally depositing the catalyst component of step d) on a support;
- f) activating the catalyst component of step d) or of step e) with an activating agent having an ionising action;
- g) optionally adding a scavenger;
- h) retrieving an active oligomerisation or polymerisation catalyst system.
A method for oligomerising or for homo- or co-polymerising ethylene and alpha-olefins that comprises the steps of:
- a) injecting the active catalyst system into the reactor;
- b) injecting the monomer and optional comonomer;
- c) maintaining under polymerisation conditions;
- d) retrieving the oligomers and/or polymer.
Dependencies are inferred from the claim text.