Process for treating tic13.1/3 a1c13 catalysts

Details Process for treating tic13.1/3 a1c13 catalysts Process for treating tic13.1/3 a1c13 catalysts

B - Operations, Transporting

01

J

252/106, 241/136

B01J 27/10 (2006.01) C08F 4/00 (2006.01)

Patent

CA 1050960

ABSTRACT Ziegler-Natta transition metal catalysts, especially physical- energy-activated cocrystallized metal halide catalysts such as TiCl3.1/3 AlCl3 catalysts obtained with commercial ball-milling techniques can be treated comprises be unexpectedly more active and more stereospecific. The process comprises heating the Ziegler-Natta catalysts, e.g. the physical-energy-activated, e.g. ball-milled, catalyst in certain inert solvents above the boiling point of the solvents for certain time intervals and at certain specified temperatures. In particular, a TiCl3.1/3 AlCl3 catalyst is ball-milled and then heated in an inert solvent above boiling the temperature of the solvent for a time sufficient to increase activity and stereospecificity in polymerization of propylene.

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