China Petroleum Chemical Corporation

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

Zhufang Sun

Lunjia Xie

Siyuan Zhao

Haitao Liu

Yu Tian

Zaixing Feng

Jing Yan Ma

Ting Huang

Jie Lin

Mingzhi Gao

Zifang Guo

Junling Zhou

Tianyi Li

Xiaofan Zhang

Yu Kang

Meiyan Fu

Yu Wang

Hui Zhao

Xiaodong Wang

Weiwei Song

Jin Zhao

Xianzhi Xia

Qing Hua Hu

Jigui Zhang

Zhong Tan

Yongtai Ling

Qingqiang Gou

Junhui Zhang

Mingsen Zhang

Fengkui Li

Shanshan Yin

Jinhua Yu

Qilong Zhou

Xiudong Xu

Tingjie Huang

Li'an Yan

Peng Kou

Lin Qi

Hongxu Yang

Changjiang Wu

Bingyi Li

Yonghua Ma

Wei Cen

Lian Yan

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.

Catalyst system for olefin polymerization and use thereof

The present invention discloses a Ziegler-Natta catalyst system for olefin polymerization, comprising at least one compound represented by formula (I) as (i) an internal electron donor, (ii) an external electron donor, or (iii) the both, wherein M, M, M, M, M, M, M', M&#x2032;, M&#x2032;, M&#x2032;, M&#x2032; and M&#x2032; are each independently selected from the group consisting of hydrogen, hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, &#x2014;Rand &#x2014;OR, wherein Rand Rare each independently a C-Chydrocarbyl, which is unsubstituted or substituted by a substituent selected from the group consisting of hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, C-Calkoxy and heteroatoms; and wherein, when among M-Mand M&#x2032;-M&#x2032;, any two adjacent groups on the same phenyl ring are each independently selected from the group consisting of Rand &#x2014;OR, the two adjacent groups may optionally be linked to form a ring, with a proviso that M, M, M, M, M, M, M&#x2032;, M&#x2032;, M&#x2032;, M&#x2032;, M&#x2032; and M&#x2032; are not simultaneously hydrogen. 

Olefin polymerization catalyst comprising cyclotriveratrylene and derivatives thereof

Disclosed is a solid catalyst component for olefin polymerization. The catalyst component comprises a dialkoxy magnesium carrier, a titanium compound, and a product from an internal electron donor reacting in an inert solvent. The internal electron donor compound comprises a 2,3-di-non-linear-alkyl-2-cyano succinic acid diester compound as presented in formula I.

Solid catalyst component and catalyst for olefin polymerization

A process for preparing 2,3-di(non-linear-alkyl)-2-cyanosuccinate compounds, especially 2,3-diisopropyl-2-cyanosuccinate compounds, and processes for preparing 2,3-di(non-linear-alkyl)succinic acids and esters thereof by using the 2,3-di-non-linear propyl-2-cyanosuccinate compounds as intermediates are disclosed.

Process for preparing 2,3-di-non-straight-alkyl-2-cyanosuccinic acid diesters

A catalyst component for olefin polymerization comprising an &#x3b1;-cyanosuccinate compound as an internal electron donor, a catalyst comprising the catalyst component, and use of the catalyst in olefin polymerization. When used in propylene polymerization, the catalyst can exhibit good catalytic activity and good hydrogen response, and the resulting polymer can have a good isotacticity and a good molecular weight distribution.

Catalyst component for olefin polymerization and a catalyst comprising the same

The present invention relates to silicon ether compounds having a general formula (I), a method for the preparation thereof and use thereof as a component of catalysts for polymerization of olefins. In particular, in propylene polymerization, catalyst systems comprising the silicon ether compounds as external electron donor component exhibit good hydrogen response, and can be used to prepare polymer having high isotacticity at high yield. wherein R-Rgroups are as defined in the description.

Silicon ether compounds and a method for the preparation thereof

The present application discloses a catalyst for olefin polymerization, comprising a product of the following components: (A) solid titanium-containing catalyst component comprising magnesium, titanium and halogen as essential components; (B) organo-aluminum compound catalyst component, and (C) silicon ether compound catalyst component, the silicon ether compound being represented by a general formula (I): wherein

Catalyst for olefin polymerization and use of the same

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Beijing, China

Zhufang Sun