Process to prepare a procatalyst for polymerization of olefins
Патенты
| Язык: |
Английский |
| Тип: |
Патент на изобретение |
| Номер (11) |
US 20230021046 A1 |
| Номер заявки (21): |
US17/778,694 |
| Дата подачи заявки (22): |
5 нояб. 2020 г. |
| Дата начала отсчета срока действия патента (24): |
20 мая 2022 г. |
| Дата публикации патента (44,45,46): |
|
| Дата публикации заявки (43): |
19 янв. 2023 г. |
The present invention relates to а process for the preparation of а procatalyst suitaЬ!e for preparing а catalyst composition for olefin polymerization, said process comprising the steps of: Step А) providing or preparing а Grignard compound; Step В) contacting the Grignard compound with а silane compound to give а solid support; Step С) activating said solid support, comprising two sub steps: Step Cl) contacting the solid support obtained in step В) with at least one first activating compound and а second activating compound; and Step С2) а second activation step Ьу contacting the partly activated solid support obtained in step Cl) with an activating electron donor; to obtain an activated solid support; Step D) reacting the activated solid support obtained in step С) with а 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 а procatalyst, а catalytic system comprising said procatalyst and to а process to prepare polyolefins using said catalyst system and the polyolefins obtained therewith.