Spherical carriers for olefin polymerization catalyst, catalyst components, catalyst, and preparation methods therefor

US9951157B2 · kind B2 · utility

Assignees

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

Inventors

• Weili Li · Beijing, CN
• Xianzhi Xia · Beijing, CN
• Yuexiang Liu · Beijing, CN
• Yongtai Ling · Beijing, CN
• Jin Zhao · Hangzhou City, CN
• Jigui Zhang · Beijing, CN
• Futang Gao · Beijing, CN
• Ping Gao · Hong Kong, CN
• Yang Tan · Beijing, CN
• Renqi Peng · Beijing, CN
• Zhihui Zhang · Katy, US
• Jie LIN · Beijing, CN
• Ruilin Duan · Beijing, CN
• Changyou Ma · Shanghai, CN

Key dates

• Filing date: Oct 17, 2014
• Grant date: Apr 24, 2018
• Expiry date: Oct 17, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2410/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Spherical carriers for an olefin polymerization catalyst, catalyst components, catalysts, and preparation methods therefor are disclosed. The method for preparing the spherical carriers comprises the following steps: (1) reacting, in the presence of at least one polymeric dispersion stabilizer, a magnesium halide with an organic compound containing active hydrogen to form a complex solution; (2) reacting said complex solution with an alkylene oxide-type compound to directly precipitate solid particles; and (3) recovering the solid particles to obtain spherical carriers. When a catalyst prepared by using the present spherical carrier is used in propylene polymerization, said catalyst exhibits high polymerization activity and high stereo-directing ability.