Process for separating a polymer from a solution containing the

Details Process for separating a polymer from a solution containing the Process for separating a polymer from a solution containing the

1983-09-08

1990-07-17

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528498, C08F 600, C08G 600, C08J 300

Patent

active

049422235

ABSTRACT:
In order to recover a polymer, such as styrene butadiene copolymer rubber, from a solution obtained by a solution polymerization of the corresponding comonomers, without degradation or deterioration of the polymer, the solution, ordinarily in 3 to 30% by weight concentration, is separated into the solvent and a more concentrated polymer solution of not less than 50% by weight, by heating the solution under a pressure at such a temperature (A) that the polymer does not decompose, heating a solvent, which is preferably the same as that for the solution, at a higher temperature than (A) above under a pressure, and joining the heated solution and the heated solvent in a mixer to convey to a flash evaporator.

REFERENCES:
patent: 2897184 (1959-07-01), Kimble et al.
patent: 3470070 (1969-09-01), Heckart
patent: 4319021 (1982-03-01), Irani

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