Patent ID: 6262191
Filing Date: 2001-07-17
Classification: B01D,B01J,C08F,Y02P

Abstract:
A process comprising:introducing an effluent from a polymerization zone, said effluent comprising solid polymer and a fluid comprising diluent, into a flash zone under conditions of temperature and pressure such that a major portion of said fluid flashes overhead to form a flash gas stream;separately withdrawing said solid polymer and remaining fluid as an intermediate product of said process;dividing said flash gas stream into two streams, a main diluent recycle stream which constitutes a major portion of said flash gas stream, and a diluent recycle slip stream which constitutes a minor portion of said flash gas stream;recycling said main diluent recycle stream to said polymerization zone;passing said diluent recycle slip stream through an olefin removal zone to produce a purified recycle diluent slip stream; andpassing said purified recycle diluent slip stream to a catalyst mixing zone.