Catalyst system for olefin polymerization
Patents
| Language: |
Китайский |
| Type: |
Invention |
| Number |
CN 119487086 A |
| Request number: |
CN202380051768.9A |
| Request date: |
Jul 5, 2023 |
| patent.field.start_date: |
|
| Registration date: |
Feb 18, 2025 |
| patent.field.request_publication_date: |
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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 ℃.