Process for preparing procatalyst for olefin polymerization
Патенты
| Язык: |
Китайский |
| Тип: |
Патент на изобретение |
| Номер (11) |
CN 114728276 A |
| Номер заявки (21): |
202080081030.3 |
| 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): |
8 июл. 2022 г. |
The present invention relates to a process for preparing 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 produce a solid support; step C) activating the solid support to obtain an activated solid support, comprising two substeps: 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 of contacting the partially activated solid support obtained in step C1) 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, a catalyst system comprising the procatalyst, and to a process for preparing polyolefins using the catalyst system, as well as the polyolefins obtained thereby.