Method of making a ziegler-natta catalyst

Details Method of making a ziegler-natta catalyst Method of making a ziegler-natta catalyst

2006-07-04

2006-07-04

Wood, Elizabeth D. (Department: 1755)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Plural component system comprising a - group i to iv metal...

C502S115000, C502S116000, C502S118000, C526S124300, C526S129000, C526S348500, C526S348600, C526S348200

Reexamination Certificate

active

07071137

ABSTRACT:
A method for making a Ziegler-Natta catalyst support includes the steps of contacting a fumed silica with a surface modifying agent such as a compound having the formula RMgX MgR′R″ wherein R, R′ and R″ are each individually a moiety selected from an alkyl group, cycloalkyl, aryl or alkaryl group, and X is a halogen selected from the group consisting of chlorine, bromine and iodine, to provide a pretreated silica seeding agent. The pretreated silica seeding agent is then dispersed in a non-aqueous liquid magnesium halide/alkanol complex, and the magnesium halide is crystallized onto the silica particles to form catalyst support particles especially suitable for Ziegler-Natta catalysts.

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