Catalyst system for olefin polymerization and use thereof

US11840508B2 · kind B2 · utility

Assignees

• CHINA PETROLEUM & CHEMICAL CORPORATION · CN
• BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION · CN

Inventors

• Jie LIN · Beijing, CN
• Xiaofan Zhang · Beijing, CN
• Ting Huang · Taipei, TW
• Junhui Zhang · Hangzhou City, CN
• Junling Zhou · Beijing, CN
• Zhufang Sun · Beijing, CN
• Xianzhi Xia · Beijing, CN
• Hui Zhao · Emeryville, US
• Zifang Guo · Beijing, CN
• Jin Zhao · Hangzhou City, CN
• Haitao Liu · Boise, US
• Meiyan FU · Beijing, CN
• Jigui Zhang · Beijing, CN
• Lin Qi · Hunan, CN
• Lian Yan · Beijing, CN
• Wei CEN · Beijing, CN
• Yu Wang · Hsinchu, TW

Key dates

• Filing date: Jul 24, 2020
• Grant date: Dec 12, 2023
• Expiry date: Aug 17, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A catalyst system for olefin polymerization contains a main catalyst and a cocatalyst. The cocatalyst contains a twelve-membered ring compound represented by formula (M). The catalyst system is suitable for preparing polypropylene products having high stereoregularity and low ash, and can regulate the melt index of the products within a wide range by adjusting the amount of hydrogenation. It is also suitable for copolymerization systems to improve the copolymerization yield.