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US 2013/0230718 A1Published application
Polyolefin Produced with a High Performance Support for a Metallocene Catalyst System
AssigneeFina Technology, Inc.
InventorsJun Tian, William Gauthier, David Rauscher, Shady Henry
Life of this patent
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Abstract
The invention is directed to a metallocene catalyst system and a process for preparing the system. The metallocene catalyst system comprises a support and metallocene bound substantially throughout the support. The selection of certain supports facilitates the production of metallocene catalyst systems having increased catalytic activity than previously recognized.
Claims22
1-26. (canceled)
A process for the polymerization of polyolefin comprising:
- introducing a metallocene catalyst system (MCS) into a polymerization reaction chamber, wherein the MCS comprises:
- a support, wherein the support has an average pore diameter of from 240 Angstroms to 350 Angstroms;
- an activator comprising an aluminoxane;
- and
- a metallocene bound substantially throughout the support, wherein the metallocene loading is about 1% to about 2%, and wherein the metallocene is selected from a group consisting of rac-dimethylsilanediyl bis(2-methyl-4-phenylindenyl)zirconium dichloride;
- rac-dimethylsilanediyl bis(2-methyl indenyl)zirconium dichloride;
- rac-dimethylsilanediyl bis(2-methyl-4,5-benzoindenyl)zirconium dichloride;
- and rac-dimethylsilanediyl bis(2-methyl-4-(1-naphthyl)indenyl)zirconium dichloride;
- and
- wherein on exposure to a reaction environment comprising about 300 g to about 400 g propylene per Liter of reactor volume, about 23 ppm by weight of the MCS, about 37 ppm by weight H2, and about 46 ppm triethylaluminum in a 4 liter reactor at about 67° C. and about one hour reaction time, the MCS has a catalytic activity of at least about 11,800 g of polypropylene/g of MCS/hr;
- and
- contacting at least one olefin monomer with the MCS in the polymerization reaction chamber.
9 more elements
Dependencies are inferred from the claim text.