Process for polymerizing ethylene

Details Process for polymerizing ethylene Process for polymerizing ethylene

1978-03-29

1979-09-18

Holler, Alan

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

Synthetic resins

Polymerizing in tubular or loop reactor

422133, 526 65, 526 68, 526 73, 526 84, 5263522, 528498, C08F 604, C08F 628, C08F 1002

Patent

active

041683560

ABSTRACT:
A process and apparatus for the polymerization of ethylene in at least one multizone reactor at a pressure of 300 to 2500 bars and at a temperature of 150 to 350.degree. C. The reaction mixture is passed from the reactor to a separator at a pressure of 50 to 500 bars in which the polymer separates from the gas. The polymer is then passed to a hopper at a pressure of 1 to 20 bars in which the major part of the gas remaining dissolved in the polymer is removed. The gas from the separator is recompressed and is returned only to the first zone of the reactor.

REFERENCES:
patent: 3099648 (1963-07-01), Dye
patent: 3184444 (1965-05-01), Eilbracht et al.
patent: 3306889 (1967-02-01), Schappert
patent: 3551397 (1970-12-01), Ratzsch et al.
patent: 3628918 (1971-12-01), Beals et al.
patent: 3708465 (1973-01-01), Dietrich et al.
patent: 3784538 (1974-01-01), Pfannmueller et al.
patent: 4014859 (1977-03-01), Cooper et al.
patent: 4105842 (1978-08-01), Nicco et al.

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