Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Patent
1986-08-27
1989-08-15
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
528491, 528501, 528503, C08F 612
Patent
active
048576336
ABSTRACT:
A process is disclosed for recovering polymer from a solution of the polymer in a solvent by high temperature phase separation in which 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 adjusted to form two phases, namely, a polymer-lean liquid phase and a polymer-rich liquid phase. The polymer-rich liquid phase is separated from the polymer-lean liquid phase, and the polymer is then recovered from the polymer-rich liquid phase.
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C. A. Irani and C. Cozewith, "Lower Critical Solution Temperature Behavior of Ethylene Propylene Copolymers in Multicomponent Solvents", pp. 1879-1899, Journal of Applied Polymers Science, vol. 31, 1986.
Cozewith Charles
Irani Cyrus A.
Kasegrande Stephen S.
Exxon Research & Engineering Company
Muller W. G.
Murray, Jr. J. B.
Schofer Joseph L.
Teskin F. M.
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