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公开(公告)号：US3743631A
公开(公告)日：1973-07-03
申请号：US3743631D
申请日：1971-08-04
Applicant: BAYER AG
Inventor： BECK M , SCHUECHTER J , MARWEDE G , KUNTZ E
CPC classification number: C08C2/06
Abstract: A PROCESS FOR ISOLATING POLYISOPRENE FROM A CATALYSTCONTAINING SOLUTION THEREOF IN AN ORGANIC SOLVENT, WHEREIN (1) THE CATALYST IS DEACTIVATED IN THE POLYMER SOLUTION WITH AN AQUEOUS OR ALCOHOLIC SOLUTION OF A HYDROXIDE OF A METAL OF GROUPS 1A OR 2A OF THE PERIODIC SYSTEM; (2) THE DEACTIVATED SOLUTION IS WASHED WITH WATER, STABILISERS AND/OR MODIFIERS OPTIONALLY BEING ADDED IN STAGE 1 OR STAGE 2; (3) THE AQUEOUS OR AQUEOUS/ALCOHOLIC PHASE IS SEPARATED OFF; (4) AN ALIPHATIC DIAMINE OR POLYAMINE IS ADDED, AND (5) THE ORGANIC SOLVENT IS REMOVED BY STREAM DISTILLATION.
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