Process for preparing a vanadium/titanium based catalyst suitabl

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

1990-08-06

1991-10-22

Garvin, Patrick P.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Plural component system comprising a - group i to iv metal...

502107, 502113, 526116, 526125, C08F 4685

Patent

active

050595709

ABSTRACT:
The present invention relates to a process for preparing a Ziegler-Natta type catalyst based on vanadium and titanium compounds precipitated on a MgCl.sub.2 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) MgCl.sub.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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