Process for preparing a vanadium-based catalyst suitable for...

Details Process for preparing a vanadium-based catalyst suitable for... Process for preparing a vanadium-based catalyst suitable for...

C - Chemistry, Metallurgy

08

F

402/383, 252/98

C08F 4/68 (2006.01) C08F 210/16 (2006.01)

Patent

CA 2022815

The present invention relates to a proces for preparing a Ziegler-Natta type catalyst based on a vanadium compound precipitated on a MgC1 2 spherical support. The catalyst preparation consists of contacting within a liquid hydrocarbon a vanadium-reducing agent chosen from organometallic compounds with a vanadium compound soluble in the liquid hydrocarbon containing at least one halogen and one alkoxy group, and with a support containing (i) MgC1 2 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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