The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 2023
Filed:
Jul. 24, 2020
China Petroleum & Chemical Corporation, Beijing, CN;
Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation, Beijing, CN;
Jie Lin, Beijing, CN;
Xiaofan Zhang, Beijing, CN;
Ting Huang, Beijing, CN;
Junhui Zhang, Beijing, CN;
Junling Zhou, Beijing, CN;
Zhufang Sun, Beijing, CN;
Xianzhi Xia, Beijing, CN;
Hui Zhao, Beijing, CN;
Zifang Guo, Beijing, CN;
Jin Zhao, Beijing, CN;
Haitao Liu, Beijing, CN;
Meiyan Fu, Beijing, CN;
Jigui Zhang, Beijing, CN;
Lin Qi, Beijing, CN;
Lian Yan, Beijing, CN;
Wei Cen, Beijing, CN;
Yu Wang, Beijing, CN;
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.