公开(公告)号：US20230021046A1

公开(公告)日：2023-01-19

申请号：US17778694

申请日：2020-11-05

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Akhlaq MOMAN ,  Vladimir Aleksandrovich ZAKHAROV ,  Sergei Andreevich SERGEEV ,  Artem BARABANOV

IPC: C08F110/06 ,  C08F4/651 ,  C08F4/656

Abstract: The present invention relates to a process for the preparation of a procatalyst suitable for preparing a catalyst composition for olefin polymerization, said process comprising the steps of: Step A) providing or preparing a Grignard compound; Step B) contacting the Grignard compound with a silane compound to give a solid support; Step C) activating said solid support, comprising two sub steps: Step C1) contacting the solid support obtained in step B) with at least one first activating compound and a second activating compound; and Step C2) a second activation step by contacting the partly activated solid support obtained in step C1) with an activating electron donor; to obtain an activated solid support; Step D) reacting the activated solid support obtained in step C) with a halogen-containing Ti compound, optionally an activator and at least one internal electron donor in several sub steps to obtain said procatalyst. The invention moreover relates to a procatalyst, a catalytic system comprising said procatalyst and to a process to prepare polyolefins using said catalyst system and the polyolefins obtained therewith.