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1. (WO2018044395) SPIRAL HEAT EXCHANGER AS A PREHEATER IN POLYMER DEVOLATILIZATION PROCESSES

Pub. No.:    WO/2018/044395    International Application No.:    PCT/US2017/041554
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Wed Jul 12 01:59:59 CEST 2017
IPC: C08F 2/01
C08F 2/04
C08F 2/06
C08F 6/06
C08F 6/10
C08F 10/02
C08F 10/06
Applicants: EXXONMOBIL CHEMICAL PATENTS INC.
Inventors: HONG, Yifeng
REIMERS, Jay, L.
Title: SPIRAL HEAT EXCHANGER AS A PREHEATER IN POLYMER DEVOLATILIZATION PROCESSES
Abstract:
This invention relates to a process for forming polymer including: polymerizing a monomer dissolved in a solvent in the presence of a catalyst system under conditions to obtain a first effluent stream including a solution of the polymer and the solvent; heating the first effluent stream in at least one spiral heat exchanger to produce a second effluent stream, where the first effluent stream flows through the spiral heat exchanger in a cross-flow direction relative to spirals of the spiral heat exchanger and performing a separation on the second effluent stream to produce: a third effluent stream including polymer substantially free of the solvent; and a recycle stream including the solvent and unreacted monomer. Processes for devolatilizing a polymer stream are also provided herein.