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US 2017/0253676 A1Published application
Catalyst Systems and Methods of Making and Using the Same
AssigneeExxonMobil Chemical Patents Inc.
InventorsLubin Luo, Anupriya Jain, Xuan Ye
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Abstract
Olefin polymerization catalyst systems and methods for making and using the same are provided.
Claims25
An olefin polymerization catalyst system comprising a silica support, wherein the silica support comprises silica gel particles having:
- a. an average surface area of from about 400 to 800 m2/g;
- b. an average pore diameter of from about 60 to 200 angstrom;
- c. at least 20% of the incremental pore volume comprised of pores having a pore diameter larger than about 100 angstrom;
- and
- d. a volume percent of pores with a pore size of from 300 to 1500 angstroms from 1.0 vol % to 95 vol %;
- wherein the catalyst system further comprises an aluminoxane, and the aluminoxane loading on the support is greater than about 9.5 mmol Al/g silica.
3 more elements
A method for making an olefin polymerization catalyst system comprising contacting:
- a. a silica support, wherein the silica support comprises silica gel particles having:
- i. an average surface area of from about 400 to 800 m2/g;
- ii. an average pore diameter of from about 60 to 200 angstrom;
- iii. at least 20% of the incremental pore volume is comprised of pores having a pore diameter larger than about 100 angstrom;
- and
- iv. a volume percent of pores with a pore size of from 300 to 1500 angstroms from 1.0 vol % to 95 vol %;
- b. an aluminoxane;
- and
- c. an olefin catalyst component,
- wherein the catalyst system has an aluminoxane loading on the support of greater than about 9.5 mmol Al/g silica.
7 more elements
Dependencies are inferred from the claim text.