Catalyst system for polymerization of an olefin
Патенты
| Язык: |
Английский |
| Тип: |
Патент на изобретение |
| Номер (11) |
EP 4551620 A1 |
| Номер заявки (21): |
EP23734696.0A |
| Дата подачи заявки (22): |
5 июл. 2023 г. |
| Дата начала отсчета срока действия патента (24): |
|
| Дата публикации патента (44,45,46): |
14 мая 2025 г. |
| Дата публикации заявки (43): |
|
A process for the preparation of a procatalyst for preparing a catalyst composition for an olefin polymerization from a solution of R4 zMgX4 2-z, wherein the solution of R4 zMgX4 2-z is prepared by a process comprising the steps of: (i) reacting a 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) for at least 1 hour at T1; (iii) raising the temperature of the reaction mixture obtained in step (ii) to a temperature T2; (iv) stirring the reaction mixture obtained in step (iii) for at least 1 hour at T2; (v) decanting or filtering the reaction mixture obtained in step (iv) to obtain a transparent solution of R4 zMgX4 2-z in the organic solvent; Wherein T1 ranges from 70°C - 90°C, T2 ranges from T1+30°C to T1+40°C.