Other

China Petroleum Chemical Corporation

Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation

Zhaowen Ma

Yuexiang Liu

Yi Wang

Wei Chen

Yijing Sun

Maozhu Jin

Baolan Zhu

Lei Guo

Xiaodong Wang

Zhichao Yang

Xianzhi Xia

Zifang Guo

Wenbo Song

Yang Tan

Renqi Peng

Chen Wei

Baoquan Xing

Hongbin Du

Weimin Ji

Rengi Peng

Changbing Xie

Huibo Shen

Meizhen Yin

The present invention relates to a catalyst component and a catalyst for olefin polymerization. The catalyst component utilizes magnesium halide and silica as composite support, and the particle morphology thereof can be improved by regulating the ratio of magnesium halide to silica. Further, the purpose of stabilizing the rate of catalytic polymerization reaction and improving the particle morphology of polymer so as to meet the requirements on catalyst performance of various polymerization processes can be achieved through the combination of the supports of the catalyst. In the meantime, when used in the polymerization of propylene, the catalyst of the present invention exhibits a relatively high polymerization activity and high stereospecificity.

Catalyst component and catalyst for olefin polymerization as well as use thereof

The present invention provides a catalyst system and processes for preparing the system for use in ethylene polymerization and copolymerization. The catalyst system is obtained by dissolving any electron-donor activator and optionally, a metal halide adjusting agent, into a solution of magnesium halide in a solvent system consisting essentially of organic epoxy compounds and organic phosphorous compounds to form a homogeneous solution. At least one coprecipitator and a titanium halide or its derivative is then mixed to form a solid component, followed by incorporating in combination with an organic aluminum component prior to use in polymerizations. The electron donor activator is an ether or alcohol, and the coprecipitator is an organic acid, anhydride, ether, or ketone.

Catalyst system for use in ethylene polymerization and copolymerization and process for preparing the same

The present invention provides a compound catalyst system useful for synthesizing polyethylenes or copolymers of ethylene having bimodal or broad molecular weight distributions, prepared by incorporating an organic alcohol as an electron-donor compound and an aluminoxane compound into the prior art compound catalyst systems, thereby promoting the activities of the two active centers, which leads to not only a large improvement in the activity of the catalyst system, but also the formation of polyethylenes and copolymers of ethylene having bimodal or broad molecular weight distributions, which in turn gives polymers having excellent processability and mechanical properties. A process for preparing the solid catalyst component used in the compound catalyst system according to the present invention and use of the compound catalyst system are also disclosed.

Compound catalyst system for synthesizing polyethylenes or copolymers of ethylene having bimodal or broad molecular weight distributions, process for preparing the same and use of the same

Growing community of inventors

Beijing, China

Zhaowen Ma