Manufacture of low density ethylene polymers of improved homogen

Details Manufacture of low density ethylene polymers of improved homogen Manufacture of low density ethylene polymers of improved homogen

1978-05-03

1979-10-02

Holler, Alan

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 59, 526921, 528501, 528502, C08F 1002, C08F11002, C08F 628

Patent

active

041699297

ABSTRACT:
A process for the continuous high pressure polymerization of ethylene in a polymerization system which comprises a polymerization zone (A), a high pressure product isolation zone (B), a throttling and control system (C), a low pressure product isolation zone (D), a second throttling and control system (E) and a discharge extruder (F), and wherein, according to the invention, the level of the ethylene polymer in the high pressure product isolation zone (B) and in the low pressure product isolation zone (D) is varied periodically. The process gives an ethylene polymer of improved homogeneity, which when used to manufacture films does not tend to form specks or fisheyes.

REFERENCES:
patent: 2852501 (1958-09-01), Richard, Jr. et al.
patent: 3117953 (1964-01-01), Goebel et al.
patent: 3294773 (1966-12-01), Gans et al.
patent: 3714123 (1973-01-01), Mancini et al.
patent: 3784538 (1974-01-01), Pfannmueller et al.
patent: 3956256 (1976-05-01), Mercx

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