Supported polyolefin catalyst for the (Co-)polymerization of eth

Details Supported polyolefin catalyst for the (Co-)polymerization of eth Supported polyolefin catalyst for the (Co-)polymerization of eth

1991-03-25

1992-06-23

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...

502113, 502115, 502120, 502128, 526125, C08F 464

Patent

active

051242966

ABSTRACT:
The present invention relates to a catalyst and a process for preparing a catalyst suitable for polymerization of olefins. The process is carried out in a hydrocarbon liquid medium and comprises successively contacting a refractory oxide support with (a) a dialkylmagnesium optionally with a trialkylaluminium, (b) a particular monochloro organic compound, (c) a titanium and/or vanadium compound(s), and then (d) with ethylene optionally mixed with a C.sub.3 -C.sub.8 alpha-olefin in the presence of an organo-aluminium or organozinc compound to form a prepolymerized catalyst. The catalyst has a high activity, particularly in a gas phase polymerization of ethylene, and has a great ability of copolymerizing alpha-olefins with ethylene.

REFERENCES:
patent: 4508843 (1985-04-01), Etherton et al.
patent: 4721763 (1988-01-01), Bailly et al.
patent: 4942148 (1990-07-01), Furuhashi et al.

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