Process for preparing a vanadium/titanium based catalyst...

Details Process for preparing a vanadium/titanium based catalyst... Process for preparing a vanadium/titanium based catalyst...

C - Chemistry, Metallurgy

08

F

402/381, 252/95

C08F 4/16 (2006.01) C08F 4/20 (2006.01) C08F 210/00 (2006.01) C08F 210/16 (2006.01) C08F 236/04 (2006.01)

Patent

CA 2023056

The present invention relates to a process for preparing a Ziegler-Natta type catalyst based on vanadium and titanium compounds precipitated on a MgCl2 spherical support. The catalyst preparation consists of contacting within a liquid hydrocarbon a vanadium- and titanium-reducing agent chosen from organometallic compounds with a vanadium compound and a titanium compound, both soluble in the liquid hydrocarbon, in a molar ratio V/Ti from 70/30 to 99.5/0.5 and a support containing (i) MgCl2 free from Mg-C bond and (ii) an organic electron donor compound free from labile hydrogen. The support consists of spherical particles having a well-defined diameter and a narrow particle size distribution. The catalyst is particularly suitable for manufacturing in a gas phase process elastomeric copolymers of propylene.

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