| 摘要 |
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 C3-C12 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 DEG -320 DEG 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 C8 aliphatic acid, especially calcium 2-ethyl hexanoate. |
