Method for high temperature phase separation of solutions contai

Details Method for high temperature phase separation of solutions contai Method for high temperature phase separation of solutions contai

1980-03-14

1982-03-09

Henderson, C. A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

264349, 528500, 528501, C08F 610

Patent

active

043190219

ABSTRACT:
A process is disclosed for recovering polymer from a solution of the polymer in a solvent by high temperature phase separation in which a low molecular weight hydrocarbon is added to the solution, the solution and the added hydrocarbon are subjected to a temperature and pressure so that one liquid phase is formed and the pressure is reduced to form three phases, namely, a vapor phase rich in the hydrocarbon, a polymer-lean liquid phase and a polymer-rich liquid phase. The polymer-rich liquid phase is separated from the vapor phase and the polymer-lean liquid phase, and the polymer is then recovered from the polymer-rich liquid phase.

REFERENCES:
patent: 2857369 (1958-10-01), Johnson
patent: 2945016 (1960-07-01), Benedict
patent: 3262922 (1966-07-01), Payne
patent: 3553156 (1971-01-01), Anolick
patent: 3726843 (1973-04-01), Anolick
patent: 3775389 (1973-11-01), Hundmeyer

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