Process for the sequential polymerization of ethylene and...

Details Process for the sequential polymerization of ethylene and... Process for the sequential polymerization of ethylene and...

C - Chemistry, Metallurgy

08

F

400/2058

C08F 297/08 (2006.01)

Patent

CA 1260175

A B S T R A C T A PROCESS FOR THE SEQUENTIAL POLYMERIZATION OF ETHYLENE AND PROPYLENE A continuous process for sequential polymerization of ethylene and propylene by first homopolymerizing propylene in a liquid medium comprising propylene monomer as major constituent and in the presence of a magnesiumchloride and titanium containing catalyst and then copolymerizing ethylene and propylene in the presence of a liquid medium, each of these reactions being effected in a stirred tank reactor, charac- terized Ln that the homopolymer slurry is transferred from the homopolymerization reactor to the coplymerization reactor through a pipe line reactor in which the residence time of the homopolymer slurry is at least 2.5 min.

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