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

1978-05-02

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

040876020

ABSTRACT:
A process for the manufacture of ethylene polymers by homopolymerization and copolymerization of ethylene at pressures of from 500 to 5,000 bars and at from 50.degree. to 450.degree. C, with subsequent isolation of the polymers in high pressure product isolation zones and low pressure product isolation zones. The various parallel product isolation zones are at different temperatures, and the mean product residence times in the zones may be identical or different. Very different products, in amounts which can be chosen according to requirements, and with mutually independent polymer properties, can be obtained using only one high pressure polymerization system.

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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