Process for the high pressure production of polyethylene

Details Process for the high pressure production of polyethylene Process for the high pressure production of polyethylene

1977-08-04

1978-10-31

Holler, Alan

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

Synthetic resins

Polymerizing in two or more physically distinct zones

526 73, 5263522, C08F 404, C08F 434, C08F 1002

Patent

active

041236009

ABSTRACT:
A process for polymerizing ethylene under the high temperature and high pressure conditions by using a battery of two or more autoclave reactors connected in series by means of piping provided with a heat exchanger, each of said reactors having an upper reaction zone and a lower reaction zone. According to this process, the reaction yield of polyethylene is higher than that attainable from the conventional two-zone polymerization methods, and the obtained polyethylene is improved in optical properties and processability.

REFERENCES:
patent: 3178404 (1965-04-01), Vaughn, Jr. et al.
patent: 3536693 (1970-10-01), Schrader et al.
patent: 3575950 (1971-04-01), Gleason et al.
patent: 3756996 (1973-09-01), Pugh et al.
patent: 3875128 (1975-04-01), Suzuki et al.
patent: 4014859 (1977-03-01), Cooper et al.

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