Process to prepare a procatalyst for polymerization of olefins
Patents
| Language: |
Английский |
| Type: |
Invention |
| Number |
WO 2021099134 A1 |
| Request number: |
PCT/EP2020/081134 |
| Request date: |
Nov 5, 2020 |
| patent.field.start_date: |
Nov 5, 2020 |
| Registration date: |
|
| patent.field.request_publication_date: |
May 27, 2021 |
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.