Mitsubishi Chemical Industries Limited

Kazuo Yamaguchi

Yasuo Maruyama

Masayoshi Hasuo

Nobuaki Goko

Nobuo Enokido

Toru Tanaka

Genjiro Kakogawa

Atsushi Murakami

Masatoshi Suzuki

Shigeaki Okano

Seiji Yoshida

Natsuki Kanoh

A process for the preparation of polyolefins, polymerizing olefins with use of a solid catalyst separated from a reaction mixture which is obtained by reducing a halogen-containing compound of vanadium with an organic aluminum compound in the presence of an ether and an organic aluminum compound.

Process for the preparation of polyolefins using a reduced vanadium

Solid titanium trichloride in the form of fine granules having low aluminum compound content, which is suitable as a catalyst for polymerization of .alpha.-olefins, especially, propylene is obtained as a precipitate by heating liquefied titanium trichloride in the presence of a liberating agent, and separating the thus formed precipitate. The liquefied titanium trichloride is preferably prepared with an reducing titanium tetrachloride by organic aluminium compound in the presence of ether and hydrocarbon.

Preparation of solid titanium trichloride

Solid titanium trichloride in the form of fine granules having low aluminum compound content, which is suitable as a catalyst for polymerization of .alpha.-olefins, especially, propylene is obtained as a precipitate by heating liquefied titanium trichloride in the presence of a liberating agent, and separating the thus formed precipitate. The liquified titanium trichloride is preferably prepared with an reducing titanium tetrachloride by organic aluminum compound in the presence of ether and hydrocarbon.

A solid catalytic complex for the polymerization of an olefin has the formula:

Catalyst and process for polymerization of olefin

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Fujisawa, Japan

Kazuo Yamaguchi