Dual reactor process and apparatus for polymerizing ethylene

Details Dual reactor process and apparatus for polymerizing ethylene Dual reactor process and apparatus for polymerizing ethylene

1979-12-17

1981-08-04

Smith, Edward J.

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

Synthetic resins

Polymerizing in tubular or loop reactor

526 65, 526 68, 528503, C08F 234, C08F 428, C08F 1002

Patent

active

042823390

ABSTRACT:
Ethylene is polymerized in a dual reactor system in which two reactors are connected in series with a heat exchanger, or intercooler, disposed therebetween. The reaction stream from the first reactor at elevated pressure and temperature is passed through the heat exchanger to effect cooling of the stream. Following passage through the heat exchanger, the pressure of the cooled reaction stream is reduced through a pressure let-down valve and the stream is thereafter introduced into the second reactor wherein further polymerization takes place. The reactors can both be of the autoclave type although one of the reactors can be of the tubular variety.

REFERENCES:
patent: 3875128 (1975-04-01), Suzuki et al.
patent: 3875134 (1975-04-01), Morikawa et al.
patent: 4085266 (1978-04-01), Nakai et al.
patent: 4123600 (1978-10-01), Kita et al.

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