Preparation of homopolymers and copolymers of ethene using a chr

Details Preparation of homopolymers and copolymers of ethene using a chr Preparation of homopolymers and copolymers of ethene using a chr

1987-10-08

1989-07-04

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502117, 526106, 526908, 526909, C08F 424, C08F 1002

Patent

active

048451762

ABSTRACT:
Ethene homopolymers and ethene copolymers with minor amounts of higher .alpha.-monoolefins are prepared by polymerization of the monomer or monomers using a chromium trioxide catalyst which is obtained by a method in which (1) a finely divided, porous, silicate carrier is laden with (2) chromium trioxide or a chromium compound which is converted to chromium trioxide under the conditions of stage (3), and then (3) the intermediate resulting from stage (2) is heated in an oxygen-containing gas stream. In this process, a cocatalyst which consists of a lithiumalkyl used in addition to the chromium trioxide catalyst.

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patent: 4110522 (1978-08-01), Frielingsdorf et al.
patent: 4727124 (1988-02-01), Konrad et al.
patent: 4728703 (1988-03-01), Konrad et al.

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