Silica-supported polymerization catalyst
AssigneeBP Chemicals Limited
InventorsHenri Cramail, Alain Deffieux, Cedric Dever, Sergio Mastroianni
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Abstract
A process for the preparation of a silicon containing transition metal compound that includes the steps of (a) non-hydrolytic sol-gel condensation of a silane of formula LxSiQn wherein L is a σ-bonded ligand, Q is an anionic ligand, and x+n=4 with a halogenated silane (or siloxane) and an alkoxysilane, (b) optionally alkylation, (c) deprotonation and (d) addition of a transition metal compound. The process allows for the preparation of transition metal compounds which may suitably be used with cocatalysts for the polymerization of olefins, in particular for such processes carried out in the gas phase.
Claims13
A process for the preparation of a silicon containing transition metal catalyst compound, said process comprising the steps of
- (a) non-hydrolytic sol-gel condensation of (i) a silane of formula
- LxSiQn
- wherein L is a σ-bonded ligand, Q is an anionic ligand, and x+n=4 with (ii) a halogenated silane or a haloqenated siloxane and (iii) an alkoxysilane,
- (b) optionally alkylation,
- (c) deprotonation, and
- (d) addition of a transition metal compound.
A process for the preparation of a silicon containing transition metal catalyst compound, said process comprising the steps of
- (a) non-hydrolytic sol-gel condensation of (i) a silane of formula
- LxSiQn
- wherein L is a σ-bonded ligand, Q is an anionic ligand, and x+n=4 with (ii) a halogenated silane or a halo,qenated siloxane and (iii) an alkoxysilane,
- (b) alkylation, and
- (c) addition of a transition metal amine.
Dependencies are inferred from the claim text.