Catalyst component comprising brown titanium trichloride

Details Catalyst component comprising brown titanium trichloride Catalyst component comprising brown titanium trichloride

C - Chemistry, Metallurgy

08

F

252/105

C08F 10/00 (2006.01)

Patent

CA 1074774

CATALYST COMPONENT COMPRISING BROWN TITANIUM TRICHLORIDE ABSTRACT OF THE DISCLOSURE A new catalyst component and its use with an organoaluminum compound, which component is a brown solid of high surface area and large pore volume consisting essentially of beta titanium trichloride and a small amount of an organic electron pair donor compound. This solid when used in conjunc- tion with an organoaluminum compound to polymerize alpha-olefins pro- duces product polymer at substantially increased rates and yields com- pared to present commercial, purple titanium trichloride while copro- ducing reduced amounts of low-molecular-weight and, particularly, amorphous polymer. Combinations of this new catalyst component and an organoaluminum compound can be further improved in their catalytic properties by addition of small amounts of modifiers, alone and in combination. Such combinations with or without modifiers show good sensitivity to hydrogen used as a molecular weight controlling agent. The combinations are useful for slurry, bulk and vapor phase polymeri- zation of alpha-olefins such as propylene.

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