Process to prepare a procatalyst for polymerization of olefins
Патенты
| Язык: |
Английский |
| Тип: |
Патент на изобретение |
| Номер (11) |
WO 2021099134 A1 |
| Номер заявки (21): |
PCT/EP2020/081134 |
| Дата подачи заявки (22): |
5 нояб. 2020 г. |
| Дата начала отсчета срока действия патента (24): |
5 нояб. 2020 г. |
| Дата публикации патента (44,45,46): |
|
| Дата публикации заявки (43): |
27 мая 2021 г. |
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.