Method for reducing the entrained light component content in polymer powders and use of the method
By using gaseous propylene to remove entrained light components from polymer powder in a gas-solid separator and then copolymerizing propylene with α-olefins, the problem of high entrained light components in polymer powder is solved, the performance of polymer products is improved, and equipment modification is simplified.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2019-10-29
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies result in high levels of light components entrained in polymer powders, leading to a composition in the subsequent gas-phase copolymerization stage that does not meet the requirements for high-performance polypropylene products, thus affecting product performance. Furthermore, existing equipment and processes are complex and costly.
Polymer powder containing entrained light components and gaseous propylene are introduced into a gas-solid separator equipped with a gas phase outlet. The entrained light components are discharged through the gaseous propylene. The polymer powder stays in the gas-solid separator for 0.5-20 minutes, followed by copolymerization reaction of propylene and α-olefin to prepare impact-resistant polypropylene.
It effectively reduces the entrainment of light components into downstream reactions, improves polymer product performance, simplifies equipment modification, and reduces process complexity and cost.
Smart Images
Figure CN122399448A_ABST