Silica Supports With High Aluminoxane Loading Capability

摘要

Olefin polymerization catalyst systems having high aluminoxane loading and methods for making and using them are disclosed herein.

主权项

1. 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; and c. at least 20% of the incremental pore volume comprised of pores having a pore diameter larger than about 100 Angstrom; 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.