Method for preparing procatalyst for olefin polymerization

• Main Authors: SERGEEV SERGEI ANDREEVICH, MOMAN AKHLAQ, BARABANOV ALEXANDER, ZAKHAROV VLADIMIR ALEKSANDROVICH
• Format: Patent
• Language: Chinese; English
• Published: 08.07.2022
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The present invention relates to a process for the preparation of a procatalyst suitable for the preparation of a catalyst composition for the polymerization of olefins, the process comprising the steps of: step A) providing or preparing a Grignard compound; step B) contacting the Grignard compound with a silane compound to produce a solid support; step C) activating the solid support to obtain an activated solid support, comprising two sub-steps: step C1) contacting the solid support obtained in step B) with at least a first activating compound and a second activating compound; and step C2) a second activation step of bringing the partially activated solid support obtained in step C1) into contact with an activating electron donor; 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 the procatalyst. The invention also relates to a procatalyst, to a catalytic syst