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Kanoh, Natsuki; Tanaka, Toru; Murakami, Atsushi; |
Polymerization of olefin

A solid catalytic component for polymerization of an olefin is prepared by reacting a vanadium trichloride ether complex with aluminum halide.


What is claimed is:
1. In a process for polymerizing ethylene alone or a mixture containing ethylene and a different .alpha.-olefin to form copolymers containing less than 10 wt.% of the .alpha.-olefin in the presence of a catalyst system comprising an organoaluminum compound and a solid catalytic component, the improvement which comprises preparing said solid catalytic component by the process which comprises:
(a) dissolving a vanadium trichloride-ether complex in a solvent to form a solution;
(b) adding to said solution a quantity of an aluminum halide sufficient to yield a molar ratio of aluminum halide to the ether in the vanadium trichloride-ether complex of 0.1 to 10, whereby said aluminum halide reacts with said vanadium trichloride-ether complex to form a precipitate consisting essentially of said solid catalytic component; and
(c) recovering said solid catalytic component.
2. The process of claim 1 wherein the solid catalytic component is washed with a solvent before combining it with the organoaluminum compound.
3. A process according to claim 1, wherein said solvent is a halogenated hydrocarbon.
4. A process according to claim 1, wherein said vanadium trichloride ether complex is vanadium trichloride tetrahydropyran complex.
5. A process according to claim 1, wherein said vanadium trichloride ether complex is vanadium trichloride tetrahydrofuran complex.
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