A New Preparation Method for Porous Titanium Trichloride

Hiroshi UENO*, Kunihiko IMANISHI, Satoshi UEKI and Tadanao KOHARA

Corporate Research & Development Laboratory, Tonen Corporation; 1-3-1 Nishi-tsurugaoka, Ohi-machi, Iruma-gun, Saitama 356-8505 Japan

A preparation method for high performance porous titanium trichloride catalyst for propylene polymerization was established. α-Titanium trichloride was selectively obtained by reducing titanium tetrachloride with a concentrated alkylaluminum compound. Highly active porous titanium trichloride catalyst was obtained from the mixture of dibutyl ether (ether/Ti>1.0) and hexachloroethane (C2Cl6/Ti>0.8). This catalyst showed 15% higher activity than conventional porous titanium trichloride catalyst. In the treatment of the mixture, crystalline structure would be transformed from α-form to δ-form by the action of chlorine radical. It is considered that the stability and the amount of chlorine radical are important to obtain high activity catalyst.

The New Preparation Method of High Performance Porous Titaniumtrichloride Catalyst for Propylene Polymerization. Part 2.

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