Solid titanium catalyst component, process for preparing...

Details Solid titanium catalyst component, process for preparing... Solid titanium catalyst component, process for preparing...

C - Chemistry, Metallurgy

08

F

C08F 4/64 (2006.01) C08F 4/642 (2006.01) C08F 4/647 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2176896

This invention provides a solid titanium catalyst component which comprises magnesium, titanium, halogen and an electron donor, is free from elimination of titanium when washed with hexane at room temperature, and has a titanium content decrease ratio of less than 15 % by weight when washed with o-dichlorobenzene at 90C. The catalyst component can be prepared by a process wherein solid titanium (i) which is free from elimination of titanium when washed with hexane at room temperature is contacted with a polar compound having a dipole moment of 0.50 to 4.00 Debye to decrease the titanium content by at least 25 % by weight, whereby a solid titanium catalyst component having a weight ratio of an electron donor to titanium of at least 7 is prepared. Olefin polymerization catalyst containing the solid titanium catalyst component can be used for (co)polymerization of olefins with high activity to obtain a polyolefin of high stereoregularity in decreased quantities of a low stereoregular polyolefin.

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