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:
Sep. 17, 2013
Filed:
Mar. 28, 2008
Wenqing Wu, Tianjin, CN;
Yongrong Yang, Zhejiang, CN;
Jingdai Wang, Zhejiang, CN;
Binbo Jiang, Zhejiang, CN;
Guanghai Luo, Beijing, CN;
Shufang Wang, Beijing, CN;
Yi Wang, Tianjin, CN;
Xianfong Zhang, Tianjin, CN;
Guodong Han, Tianjin, CN;
Wenqing Wu, Tianjin, CN;
Yongrong Yang, Zhejiang, CN;
Jingdai Wang, Zhejiang, CN;
Binbo Jiang, Zhejiang, CN;
Guanghai Luo, Beijing, CN;
Shufang Wang, Beijing, CN;
Yi Wang, Tianjin, CN;
Xianfong Zhang, Tianjin, CN;
Guodong Han, Tianjin, CN;
China Petroleum & Chemical Corporation, , CN;
Zhejiang University, , CN;
Abstract
A composite catalyst useful in the production of polyethylene, which comprises at least a first catalyst and a second catalyst separated by a polymer layer, with the first catalyst and the second catalyst being identical or different, is described. A composite catalyst useful in the production of polyethylene with a broad molecular weight distribution in a single polymerization reactor, which comprises at least a first catalyst and a second catalyst separated by a polymer layer, with the first catalyst and the second catalyst being different, is also described. A process for preparing said catalysts and a process for the production of a polyethylene by using said catalysts are also described.