Process for recovering and purifying unreacted propylene during

Details Process for recovering and purifying unreacted propylene during Process for recovering and purifying unreacted propylene during

1980-11-25

1985-07-16

Henderson, Christopher A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528481, 528503, C08F 610, C08F 628

Patent

active

045297959

ABSTRACT:
During the recovery of the unreacted propylene from the mother liquor obtained in the polymerization of liquid propylene, the major part of the propylene is evaporated in a first evaporation step at a low temperature and the remaining part is evaporated in a second evaporator at a high temperature. In this way an early agglomerization of the atactic and/or low-molecular weight polymer dissolved in the mother liquor and fouling of the heat exchanger tubes and/or of the column trays is avoided.

REFERENCES:
patent: 3719643 (1973-03-01), Knight
patent: 3816379 (1974-06-01), Rosenbaum
patent: 4093795 (1978-06-01), Buechner

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