Manufacture of ethylene copolymers

Details Manufacture of ethylene copolymers Manufacture of ethylene copolymers

C - Chemistry, Metallurgy

08

F

402/396, 402/610

C08F 2/00 (2006.01) C08F 10/02 (2006.01) C08F 210/02 (2006.01)

Patent

CA 1130045

Abstract of the Disclosure: A continuous process for the manufacture of ethylene copolymers under high pressure and at high temperature in a polymerization zone, with trans- fer of the reaction mixture into a high pressure product isolation zone and from there into a low pressure product isolation zone, and recycling of the unconverted gas from the high-pressure product isolation zone into the poly- merization zone and from the low pressure product isolation zone into a low temperature separator, from where the comonomer separated off is recycled to the polymerization process, whilst the ethylene is discharged as off-gas. The gas taken off the low pressure product isolation zone is preferably compressed to from 10 to 20 bar and cooled to from -10 to -30°C before it is fed into the low temperature separator. There is a substantial improvement in the efficiency of separating off the comonomer.

319541

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