公开(公告)号：US20220339592A1

公开(公告)日：2022-10-27

申请号：US17763440

申请日：2020-09-23

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Mpho Prudence SETLHAKU ,  Martin Alexander ZUIDEVELD ,  Bobby Johannes Henricus Hubertus SMEETS

IPC: B01J8/00 ,  C08F10/06 ,  B01J8/08 ,  B01J8/14 ,  B01J8/18

Abstract: The present invention relates to a process for the polymerization of olefin monomers in the presence of a catalyst system, using a tubular pre-polymerization reactor, wherein the tubular pre-polymerization reactor has a length L and the flow of a catalyst system is introduced in the tubular pre-polymerization reactor in the middle (30-70% of L) or the end (70-95% of L) of the tubular pre-polymerization reactor.

公开(公告)号：US20200087420A1

公开(公告)日：2020-03-19

申请号：US16494462

申请日：2018-03-14

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Martin Alexander ZUIDEVELD ,  Bobby Johannes Henricus Hubertus SMEETS ,  Thijs VAN MULKEN

IPC: C08F2/01 ,  C08F110/06 ,  C08F4/656 ,  B01J8/10

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.