Preparation of a titanium component for polymerization catalysts

Details Preparation of a titanium component for polymerization catalysts Preparation of a titanium component for polymerization catalysts

1979-07-05

1980-09-23

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

526144, C08F 464

Patent

active

042241839

ABSTRACT:
A special process for the preparation of a titanium component for polymerization catalysts of the Ziegler-Natta type, wherein (1) in a first stage (1.1) an alcoholate of the formula Mr(OR).sub.2, where R is lower alkyl and (1.2) a chlorotoluene of the formula ##STR1## where X is chlorine or hydrogen, are milled together in a particular molar ratio in a vibratory ball mill under particular milling conditions, especially a relatively low temperature, in the absence of a diluent, thereafter (2) in a second stage (2.1) the material resulting from stage (1) is brought together with (2.2) titanium tetrachloride in a particular ratio, the batch is kept for some time at an elevated temperature, with constant mixing, and the resulting solid is isolated, excess titanium tetrachloride being separated off, and finally (3) in a third stage (3.1) the solid resulting from stage (2) is again brought together with (3.2) titanium tetrachloride in a particular ratio, the batch is again kept for some time at an elevated temperature, with constant mixing, and the resulting solid, constituting the novel titanium component, is isolated, excess titanium tetrachloride being removed. The novel titanium compound permits the production of polymers of .alpha.-monoolefins not only in high yield but also with high isotacticity.

REFERENCES:
patent: 3560146 (1971-02-01), Luciani et al.
patent: 4079175 (1978-03-01), Tokunaga et al.
patent: 4168361 (1979-09-01), Oda et al.

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