Working up liquid products from polyisobutene production by cationic polymerisation involves flash evaporation to give a liquid containing polyisobutene and a gas phase containing isobutene and inert diluent

摘要

A method for working up liquid reaction products from the cationic polymerisation of isobutene (mainly polyisobutene (PIB), unreacted isobutene and inert diluent) involves heating and flash evaporation to give a PIB-containing liquid phase and a gas phase containing most of the unreacted isobutene and at least 30% of the inert diluent.