Phosphite in MgX.sub.2 supported TiX.sub.3 /AlCl.sub.3 catalyst

Details Phosphite in MgX.sub.2 supported TiX.sub.3 /AlCl.sub.3 catalyst Phosphite in MgX.sub.2 supported TiX.sub.3 /AlCl.sub.3 catalyst

1977-12-23

1978-12-19

Konopka, P. E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

526125, 526139, C08F 402, C08F 416

Patent

active

041305035

ABSTRACT:
A catalyst system is made up of a catalyst and a cocatalyst. The catalyst component comprises a magnesium chloride support, a titanium trichloride, an aluminum trichloride and an organic phosphite. The cocatalyst comprises an organoaluminum compound. Exemplary of such a system is a MgCl.sub.2 supported TiCl.sub.3 . 1/3AlCl.sub.3 plus triphenyl phosphite as the catalyst and triethylaluminum plus diethylaluminum chloride and ethyl anisate as the cocatalyst. Such catalyst systems give both high productivity and low solubles in the polymerization of propylene. For ethylene polymerization, the cocatalyst can simply be triethylaluminum.

REFERENCES:
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patent: 3576902 (1971-04-01), Bearden, Jr. et al.
patent: 3888835 (1975-06-01), Ito et al.
patent: 3926928 (1975-12-01), Karayannis et al.
patent: 3940345 (1976-02-01), Count
patent: 3953414 (1976-04-01), Galli et al.
patent: 4021599 (1977-05-01), Kochar et al.

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