Process for the preparation of olefine polymerization catalysts

Details Process for the preparation of olefine polymerization catalysts Process for the preparation of olefine polymerization catalysts

1977-05-12

1980-03-04

Smith, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252429B, 252429C, 526114, 526121, 526137, 526142, 526155, 526187, 526188, 526351, 526352, C08F 402, C08F 1002

Patent

active

041918169

ABSTRACT:
A process for the preparation of catalysts for the polymerization of olefines, e.g. ethylene and propylene. This process comprises essentially the two following steps:
(1) A compound (A) of an element selected from groups Ia, Ib, IIa, IIb, IIIa, IIIb, VIa and VIIb of the Periodic Table of Elements is heated and milled under the protection of an inert gas with an organic acetoxy compound; then the volatile portions of the mixture are eliminated by distillation.
(2) The solid resulting from the first step is dissolved or dispersed in a non-polar hydrocarbon and an activator (B) is added, mixed and heated with said solution or dispersion until a homogeneous solution or dispersion of activated catalyst is obtained. (B) is selected from compounds of elements IVa, IVb and Vb of the Periodic Table.
This catalyst is used in admixture with a polymerization promoter (C) selected from organo-metallic additives, e.g. aluminum-organic compounds for the polymerization of olefines at relatively low temperatures and pressures. Polymerization activities which may reach about 500,000 have been measured.

REFERENCES:
patent: 3642746 (1972-02-01), Kashiwa et al.
patent: 3647772 (1972-03-01), Kashiwa
patent: 3676415 (1972-07-01), Dietrich et al.
patent: 3694421 (1972-09-01), Velter
patent: 3840470 (1974-10-01), Ligorati et al.
patent: 3883492 (1975-05-01), Delbouille et al.
patent: 3984389 (1976-10-01), Delbuuille et al.
patent: 3989879 (1976-11-01), Berger et al.
patent: 4056668 (1977-11-01), Berger et al.
Kirk-Othmer "Encyclopedia of Chemical Technology", 2nd Ed., John Wiley & Sons, N.Y. (1967) vol. 12, pp. 709 & 710.

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