Multi-stage isolation of high pressure polyethylene

Details Multi-stage isolation of high pressure polyethylene Multi-stage isolation of high pressure polyethylene

1976-05-19

1978-04-04

Levin, Stanford M.

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

Synthetic resins

Treating polymer containing material or treating a solid...

260676R, 526 64, 526352, 528501, 528503, C08F 626, C08F 628

Patent

active

040829103

ABSTRACT:
A process for the manufacture of ethylene polymers by high pressure polymerization of ethylene, if desired mixed with other compounds copolymerizable with ethylene, and isolation of the reaction product in a multi-stage isolation zone. The molecular weight of the ethylene polymer can be varied by varying the mean product residence time in the isolation zone. The isolation zone preferably consists of two stages, with a higher pressure prevailing in the first stage than in the second stage.

REFERENCES:
patent: 2646425 (1953-07-01), Barry
patent: 3201365 (1965-08-01), Charlesworth et al.
patent: 3336281 (1967-08-01), Eilbracht et al.
patent: 3412080 (1968-11-01), Smith et al.

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