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1. (WO2018038796) OLEFIN POLYMERIZATION PROCESSES

Pub. No.:    WO/2018/038796    International Application No.:    PCT/US2017/038791
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Fri Jun 23 01:59:59 CEST 2017
IPC: C08F 110/06
C08F 2/00
C08F 4/642
C08F 10/06
Applicants: EXXONMOBIL CHEMICAL PATENTS INC.
Inventors: BAUCH, Christopher G.
ENGLEHORN, Blu E.
LAWSON, Kevin, W.
EDWARDS, Todd S.
TRAPP, Keith, W.
Title: OLEFIN POLYMERIZATION PROCESSES
Abstract:
A process for reducing the level of hydrogen in certain polymerization effluent and recycle streams containing unreacted propylene monomers and hydrogen by contacting the streams with a hydrogenation catalyst so as to convert at least part of the propylene to the corresponding alkane. The process is particularly applicable to the effluent from a slurry polymerization reactor which has been used to produce a polypropylene homopolymer or copolymer having a first molecular weight and at least part of the effluent is to be supplied to a slurry polymerization reactor to produce a polypropylene homopolymer or copolymer having a second, higher molecular weight.