Manufacture of high pressure polyethylene

Details Manufacture of high pressure polyethylene Manufacture of high pressure polyethylene

1977-11-10

1979-05-08

Holler, Alan

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 64, 526921, C08F 600, C08F 626, C08F 1002

Patent

active

041537742

ABSTRACT:
A process for the high pressure polymerization of ethylene at elevated temperatures in a polymerization zone followed by transfer of the reaction mixture, through a cooling zone, into the separation zone. In this process, the pressure at the cooling zone outlet is periodically reduced briefly, at recurring intervals, these brief pressure reductions being independent of the pressure reductions in the polymerization zone. Using this process, the conversion in the polymerization unit can be increased and a more homogeneous ethylene polymer can be obtained.

REFERENCES:
patent: 3784538 (1974-01-01), Pfannmueller et al.

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