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Dive into the research topics where Qinfang Zhao is active.

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Featured researches published by Qinfang Zhao.


Applied Catalysis A-general | 2000

Studies on highly efficient promoters for titanium-based Ziegler–Natta catalyst for ethylene polymerization

He-Kuan Luo; Ruiguo Tang; Hua Yang; Qinfang Zhao; Jingyan An

Abstract Three kinds of organohalides, including alicyclic halocarbons, aromatic halocarbons and aliphatic halocarbons, were studied as promoters for titanium-based Ziegler–Natta catalysts. The results showed that these three kinds of organohalides all have high activity promotion for titanium-based Ziegler–Natta catalyst. Chloro-cyclohexane (C 6 H 11 Cl), chlorobenzene (C 6 H 5 Cl), Cl–(CH 2 ) 5 –Cl, CF 2 ClCFCl 2 have very high promotion effect; with these as promoters the activity could be increased by over two times. The promoters could be added into the autoclave individually, or first blended with AlEt 3 solution, then added together into the autoclave.


Archive | 2001

Silica gel-supported catalyst component for ethylene (co)polymerization, catalyst therefrom and use of the same

He-Kuan Luo; Ruiguo Tang; Kejing Gao; Qinfang Zhao; Jingyan An; Hua Yang; Jinsheng Huo


Archive | 2007

Catalyst component, preparation method and catalyst for ethylene polymerization

Kejing Gao; Hongtao Wang; Junling Zhou; Xinping Lu; Wei Chen; Ruen Wang; Yisen Wang; Qinfang Zhao


Archive | 2011

Catalyst component for ethylene polymerization and preparation and application thereof

Xinping Lv; Kejing Gao; Junling Zhou; Hongtao Wang; Ruen Wang; Qinfang Zhao; Baoquan Xing; Xiaojing Cheng; Changli Zhang


Archive | 2007

Catalyst carrier and its catalyst for polymerizing ethane

Kejiang Gao; Xinping Lv; Ruen Wang; Yisen Wang; Qinfang Zhao; Xiaojing Cheng


Archive | 2007

Catalyst component for ethylene polymerization and its preparation method

Kejing Gao; Hongtao Wang; Xinping Lv; Wei Chen; Yisen Wang; Ruen Wang; Qinfang Zhao


Archive | 2003

Catalyst component for ethylene polymerization, a process for preparing thereof and catalyst comprising the same

Kejing Gao; Dongbing Liu; Wei Chen; Guirong Fan; Xinping Lu; Jingyan An; Ying Guan; Jun Zhang; Qinfang Zhao


Archive | 2000

Supported catalyst for ethylene (co)polymerization, preparation and use of the same

He-Kuan Luo; Ruiguo Tang; Hua Yang; Qinfang Zhao


Archive | 2000

Spherical catalyst for (co)polymerization of ethylene, preparation and use of the same

He-Kuan Luo; Ruiguo Tang; Hua Yang; Qinfang Zhao


Archive | 2007

Combination of catalysts for polymerization of ethylene, preparation method, and application

Ruen Wang; Wei Chen; Kejing Gao; Hongtao Wang; Junling Zhou; Xinping Lu; Qinfang Zhao; Xiaojing Cheng

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