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US 2016/0108145 A1Published application
Processes for preparing solid metallocene-based catalyst systems
AssigneeChevron Phillips Chemical Company LP
InventorsKensha M. Clark, Qing Yang, Gary L. Glass
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Abstract
Methods for preparing metallocene-based catalyst systems containing an activator-support are disclosed. These methods can include contacting a solid metallocene compound, an activator-support, and an organoaluminum compound, resulting in catalyst systems with increased catalytic activity as compared to catalyst systems utilizing a solution of the metallocene compound.
Claims24
A process to produce a catalyst composition, the process comprising:
- (i) contacting an activator-support and a solid metallocene compound for a first period of time to form a precontacted mixture;
- and
- (ii) contacting the precontacted mixture with an organoaluminum compound for a second period of time to produce the catalyst composition;
- wherein an activity of the catalyst composition is from about 5% to about 100% greater than that of a catalyst system obtained by using a solution of the metallocene compound instead of the solid metallocene compound, under the same polymerization conditions.
1 more element
8-9. (canceled)
A process to produce a catalyst composition, the process comprising contacting, in any order:
- (a) an activator-support;
- (b) a solid metallocene compound;
- and
- (c) an organoaluminum compound;
- to produce the catalyst composition;
- wherein an activity of the catalyst composition is from about 5% to about 100% greater than that of a catalyst system obtained by using a solution of the metallocene compound instead of the solid metallocene compound, under the same polymerization conditions.
3 more elements
17-20. (canceled)
Dependencies are inferred from the claim text.