中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

3 records (took 0.013 seconds)

    Process of making polyolefins
    1.
    发明授权
    Process of making polyolefins 有权

    公开(公告)号：US11186653B2

    公开(公告)日：2021-11-30

    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 ,  B01J8/10 ,  C08F4/656 ,  C08F110/06

    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.

Patent Agency Ranking