Deactivation of catalyst in solution process for polymerization

Details Deactivation of catalyst in solution process for polymerization Deactivation of catalyst in solution process for polymerization

1982-11-19

1984-02-07

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

524398, 524400, 528485, 528486, C08F 242, C08F 1002

Patent

active

044304889

ABSTRACT:
The present invention relates to a solution polymerization process for the preparation of high molecular weight polymers of .alpha.-olefins selected from the group consisting of homopolymers of ethylene and copolymers of ethylene and C.sub.3 -C.sub.12 .alpha.-olefins. The process comprises feeding monomer, coordination catalyst containing vanadium and inert hydrocarbon solvent to a reactor, polymerizing the monomer at a temperature in the range of 105.degree.-320.degree. C. and a pressure of less than 25 MPa and deactivating the catalyst in the solution so obtained by admixing therewith a solution of a salt of an alkaline earth metal or zinc and an aliphatic monocarboxylic acid dissolved in hydrocarbon solvent. The hydrocarbon solvent is then separated from the resultant solution and a composition comprising high molecular weight polymer is recovered. Any catalyst residues remain with the polymer. A particular salt is the salt of a C.sub.8 aliphatic acid, especially calcium 2-ethyl hexanoate.

REFERENCES:
patent: 2978442 (1961-04-01), Brighttrill et al.
patent: 2985617 (1961-05-01), Salyer et al.
patent: 3520866 (1970-07-01), Bacski
patent: 4105609 (1978-08-01), Machon et al.

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