Catalyst composition and methods for its preparation and use in a polymerization process
AssigneeUnivation Technologies, LLC
InventorTimothy T. Wenzel
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Abstract
The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a carbonyl compound. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(s). In particular, the polymerization catalyst system is supported on a carrier. More particularly, the polymerization catalyst comprises a bulky ligand metallocene-type catalyst system.
Claims20
A process for polymerizing olefin(s) in a reactor in the presence of a catalyst composition comprising a bulky ligand metallocene-type catalyst and an activator, the process comprising contacting monomer(s) under polymerizing conditions with the catalyst;
- wherein the catalyst is contacted prior to its introduction into the reactor with a carbonyl compound selected from aldehydes, monoketones and α-diketones.
A gas phase or slurry phase process for polymerizing olefin(s) in a reactor in the presence of a catalyst composition, the catalyst composition comprising at least a bulky ligand metallocene-type catalyst and an activator and at least one carbonyl compound selected from aldehydes, monoketones and α-diketones.
A continuous gas phase process for polymerizing monomer(s) in a reactor, said process comprising the steps of:
- (a) continuously introducing a stream of monomer(s) into the reactor;
- (b) introducing a polymerization catalyst comprising a bulky ligand metallocene-type catalyst and an activator and a carbonyl compound into the reactor;
- (c) withdrawing polymer product for the reactor;
- (d) withdrawing from the reactor as a recycle stream unreacted monomer(s);
- (e) cooling the recycle stream;
- (f) introducing the recycle stream into the reactor;
- (g) withdrawing a polymer product from the reactor.
A process for polymerizing olefin(s) in a reactor in the presence of a catalyst composition comprising a bulky ligand metallocene-type catalyst and an activator, the process comprising the steps of:
- (a) introducing a first carbonyl compound selected from aldehydes, monoketones and αdiketones into the reactor;
- (b) introducing the catalyst composition into the reactor after step (a) and/or simultaneously introducing the catalyst composition into the reactor with step (a);
- (c) introducing olefin(s) into the reactor;
- and
- (d) recovering polymer product.
Dependencies are inferred from the claim text.