Process for separating polymerization solvent media from elastomeric polymer
Abstract
Abstract PROCESS FOR SEPARATING AND RECOVERING LIQUID POLYMERIZATION MEDIUM FROM ELASTOMERIC POLYMERS PRODUCED THEREIN COMPRISING, IN SEQUENCE, (A) FIRST CONTACTING THE POLYMER SOLUTION OR SUSPENSION WITH A LIQUID WHICH IS A NONSOLVENT FOR THE POLYMER TO EFFECT INITIAL PHASE SEPARATION BETWEEN THE POLYMER AND THE POLYMERIZATION MEDIUM; (B) SECOND, EXTRACTING RESIDUAL MEDIUM FROM THE POLYMER BY CONTACTING IT WITH A LIQUID WHICH IS A NONSOLVENT FOR THE POLYMER BUT A SOLVENT FOR THE MEDIUM; (C) THIRD, SEPARATING THE POLYMER FROM THE LIQUID PHASE, AS BY CENTRIFUGING, AND RECYCLING SAID POLYMER TO THE SECOND STEP (B) UNTIL THE DESIRED RESIRED RESIDUAL CONTENT OF MEDIUM IN THE POLYMER IS OBTAINED; AND (D) PASSING THE LIQUID PHASE FROM STEP (C) THROUGH AN ADSORPTION COLUMN TO SEPARATE THE MEDIUM FROM THE EXTRACTING LIQUID BY SELECTIVE ADSORPTION AND RECYCLING THE THUS REGENERATED EXTRACTION LIQUID FOR FURTHER USE IN SAID EXTRACTION STEP (B).
Inventors
- 👤 Giovanni Di Drusco
- 👤 Paolo Galli
Bibliographic Details
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