Devolatilization method
Abstract
Abstract A METHOD IS DISCLOSED FOR ENHANCING THE EFFICIENCY OF SEPARATING VOLATILES FROM A VISCOUS POLYMERIC SOLUTION CONTAINING A POLYMER OF STYRENE AND VOLATILE AROMATIC SOLVENT COMPRISING INJECTING WATER AS A DEVOLATILIZATION AID INTO SAID POLYMERIC STYRENE SOLUTION IN AN INJECTION ZONE IN AN AMOUNT GREATER THAN 0.50 TO ABOUT 2.75 WEIGHT PERCENT (BASED ON SAID STYRENE POLYMER), INTRODUCING THE DEVOLATILIZATION AID-CONTAINING POLYMERIC TYRENE SOLUTION INTO A DEVOLATILIZATION ZONE MAINTAINED AT A PRESSURE LOWER THAN THAT OF SAID INJECTION ZONE AND AT A TEMPERATURE ABOVE THE BOILING POINT OF SAID VISCOUS POLYMERIC STYRENE SOLUTION AT SUCH LOWER PRESSURE TO VOLATILIZE SUCH VOLATILE SOLVENT AND DEVOLATILIZATION AID, SEPARATING SAID VOLATILIZED CONSTITUENTS FROM SAID DEVOLATILIZATION ZONE TO PROVIDE DEVOLATILIZED STYRENE POLYMER, AND REMOVING THE DEVOLATILIZED STYRENE POLYMER FROM SAID DEVOLATILIZATION ZONE.
Inventors
- 👤 T Szabo
Bibliographic Details
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