Catalyst system for olefin polymerization
Патенты
| Язык: |
Китайский |
| Тип: |
Патент на изобретение |
| Номер (11) |
CN 119487086 A |
| Номер заявки (21): |
CN202380051768.9A |
| Дата подачи заявки (22): |
5 июл. 2023 г. |
| Дата начала отсчета срока действия патента (24): |
|
| Дата публикации патента (44,45,46): |
18 февр. 2025 г. |
| Дата публикации заявки (43): |
|
The present invention relates to a process for preparing a procatalyst for the preparation of a catalyst composition for olefin polymerization from a solution of R 4 zMgX4 2‑z, wherein a solution of R 4 zMgX4 2‑z is prepared by a process comprising (i) reacting magnesium powder with an organic halide in the presence of an organic solvent at a temperature of T1, (ii) stirring the reaction mixture obtained in step (i) at T1 for at least 1 hour, (iii) raising the temperature of the reaction mixture obtained in step (ii) to a temperature of T2, (iv) stirring the reaction mixture obtained in step (iii) at T2 for at least 1 hour, (v) decanting or filtering the reaction mixture obtained in step (iv) to obtain a transparent solution of R 4 zMgX4 2‑z in an organic solvent, wherein T1 is in the range of 70-90 ℃ and T2 is in the range of T1+30 ℃ to T1+40 ℃.