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1. (WO2018167155) PROCESS OF MAKING POLYOLEFINS

Pub. No.:    WO/2018/167155    International Application No.:    PCT/EP2018/056408
Publication Date: Fri Sep 21 01:59:59 CEST 2018 International Filing Date: Thu Mar 15 00:59:59 CET 2018
IPC: C08F 2/00
C08F 4/656
C08F 110/06
C08F 4/646
B01J 8/10
Applicants: SABIC GLOBAL TECHNOLOGIES B.V.
Inventors: ZUIDEVELD, Martin Alexander
SMEETS, Bobby Johannes Henricus Hubertus
VAN MULKEN, Thijs
Title: PROCESS OF MAKING POLYOLEFINS
Abstract:
The present invention relates to a process for the continuous production of a polyolefin, preferably polypropylene, in a horizontal stirred bed polymerization reactor by contacting one or more olefins, preferably propylene, with a catalyst system while stirring, said catalyst system comprising: * a procatalyst comprising i) titanium; ii) a magnesium-containing support, preferably a magnesium chloride-containing support, and iii) an internal electron donor; * optionally an external electron donor; and * a co-catalyst, being a alkyl aluminum catalyst having formula AlXnR3-n, wherein each X is independently a halide or a hydride and wherein n is 0, 1 or 2, preferably 0, and wherein R is an C1-C12 alkyl group, preferably ethyl, wherein the molar ratio of aluminum (Al) from the co-catalyst to titanium (Ti) from the procatalyst (Al/Ti) is at least 75. The present invention also relates to polyolefin prepared using said process and a shaped article comprising said polyolefin. The present invention moreover relates to the use of a titanium to aluminum ratio during the Ziegler-Natta polymerization of olefins in a horizontal stirred bed reactor to reduce the energy (power) consumption in view of a situation wherein the titanium to aluminum ratio is lower.