Catalyst modifiers and their use in the polymerization of olefin(s)
AssigneeUnivation Technologies, LLC
InventorsTimothy T. Wenzel, Dick A. Nagaki, Simon Mawson, David James Schreck, Thomas H. Peterson
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Abstract
The present invention relates to the use of at least one acid and at least one base and/or at least one reductant and at least one oxidant that when used with a polymerization catalyst in a polymerization process results in the controllable generation of a catalyst inhibitor that renders the polymerization catalyst substantially or completely inactive.
Claims55
A catalyst composition comprising a polymerization catalyst and at least two different compounds that at a specified temperature react to form a catalyst inhibitor that deactivates the catalyst composition.
A process for polymerizing olefin(s) in the presence of a polymerization catalyst and at least two different compounds in a reactor at an operating temperature, wherein the at least two different compounds react at a temperature above the operating temperature to form a catalyst inhibitor that reduces the effectiveness of the polymerization catalyst to polymerize olefin(s).
A continuous process for polymerizing one or more olefins in the presence of a polymerization catalyst in a reactor under polymerization conditions, the process comprising the steps (a) introducing a first compound;
- (b) introducing a second compound;
- wherein the first and second compounds react in the reactor to form at least one catalyst inhibitor.
A catalyst composition comprising a bulky ligand metallocene-type catalyst compound, an activator, a support, an acid compound and a base compound, wherein the acid compound and the base compound are unreactive.
A method for preparing a catalyst composition comprising the steps of:
- (a) mixing a polymerization catalyst with an activator;
- (b) adding a first compound;
- (c) adding a second compound;
- wherein during the preparation the first and second compounds are unreactive.
In a process for polymerizing one or more olefins in the presence of a catalyst composition in a reactor operating at a polymerization temperature and a polymerization pressure to produce a polymer product, the process comprising at least one reaction of at least two different compounds producing at least one catalyst inhibitor at a temperature above the polymerization temperature.
The process of claim 51 wherein the at least two different compounds are at least one acid compound and at least one base compound.
Dependencies are inferred from the claim text.