Continuous process for the manufacture of low-density polyethyle

Details Continuous process for the manufacture of low-density polyethyle Continuous process for the manufacture of low-density polyethyle

1980-11-17

1986-08-19

Smith, Edward J.

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

Synthetic resins

Polymerizing in two or more physically distinct zones

526 66, 5263522, C08F 202, C08F 1002

Patent

active

046070869

ABSTRACT:
An improved continuous process for the manufacture of polymers of ethylene in autoclave reactors with practically complete back-mixing under pressure of from about 800 to about 2500 bars in the presence of free-radical-generating initiators is provided wherein (a) two autoclaves are connected in series in such a way that all the reaction product from the first reactor is fed to the second reactor, (b) each autoclave has a length/diameter (L/D) ratio of from about 1:1 to about 3:1, (c) the monomer(s) feed stream is divided between the two reactors such that when the temperature/concentration and/or pressure environment in the first reactor is different from that in the second reactor, the monomer(s) feed stream to the first reactor is equal to or greater than the monomer(s) feed stream to the second reactor, (d) the reaction temperatures in the two autoclaves are set such that when the temperature in the first reactor is different from that in the second reactor, the temperature in the first reactor is lower than the temperature in the second reactor, (e) the amount of initiator fed into each reactor being greater than 0.

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