Production of ethylene copolymers

Details Production of ethylene copolymers Production of ethylene copolymers

C - Chemistry, Metallurgy

08

F

402/610

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

Patent

CA 1118944

O.Z. 0050/033573 Abstract of the disclosure: A process for the continuous production of an ethylene copolymer by compressing a mixture of ethylene and comonomer in a pre-compressor and a post-compresso, copolymerizing the mixture in a poly- merization zone at a high temperature and high pressure, transferring the reaction mixture into a high pressure product isolation zone, from there into a low pressure product isolation zone and thereafter into a discharge extruder, and recycling the greater part of the unconver- ted monomer into the polymerization process and passing a small part of the unconverted gas into a low temperature isolation zone, in which process a small part of the gas recycled from the high pressure product isolation zone is passed into the low temperature isolation zone, which is pre- ferably under a pressure of from 10 to 30 bar and at from -10 to -50°C, and all the gas taken off the low pressure product isolation zone is fed to the pre-compressor. Using the novel process, the separating-off of the comono- mer which has remained unconverted in the polymerization process can be improved.

341666

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