Shanghai Research Institute of Chemical Industry Co., Ltd

China Petroleum Chemical Corporation

Xiamen University

Shanghai Research Institute of Chemical Industry

China Petroleum & Cheimcal Corporation

Yucai Cao

Xiaofeng Ye

Chen Ni

Yongqing Li

Fan Wang

Jie Li

Zhaolin Yin

Zhenyu Liu

Rui Liu

Lujian Li

Zhenxu Lu

Shengbiao Liang

Jiancheng Li

Wenjun Jiang

Shumeng Xiao

Xionghua Chen

Hongping Zhu

Weizhe Wang

Yanfang Huang

Shibing Chen

Dongwen Zhong

An Shen

Guoyu Liu

Xiangyang Wu

Si Tan

Xianghong Zhong

Ruizhen Lu

A method for preparing a high viscosity index poly-α-olefin subjects α-olefin to a polymerization reaction in the presence of a metallocene catalyst to obtain a poly-α-olefin. The polymerization reaction is carried out in the absence of a solvent, and the metallocene catalyst is formed of, or is formed by interaction between, a metallocene compound and an activator.

Method for preparing high viscosity index poly-alpha-olefin

A ligand based chromium catalyst and application in catalyzing ethylene oligomerization are disclosed. The chromium catalyst is formed by a chromium compound and an organic ligand containing P and/or N. The substituents on N and P of the ligand can be replaced, whereby selective ethylene trimerization and tetramerization can be realized so as to produce 1-hexene and 1-octene at the same time.

Ligand based chromium catalyst and application in catalyzing ethylene oligomerization

The present invention relates to an n-heterocyclic carbene (NHC) type palladium catalyst and its preparation method as well as applications. Its preparation process is as below: select glyoxal as the raw material to synthesize glyoxaldiimine in the presence of Lewis acid or Bronsted acid, and then react with paraformaldehyde to get the NHC type ligand. Use palladiumto react with the compound containing carbon-nitrogen double bonds to get palladiumcyclic dimer; make the palladium cyclic dimer and the NHC type ligand coordinated to get the NHC type palladium catalyst. The palladium catalyst with a brand new structure according to the present invention, boasts high activity and multi-purpose. In addition, it shows excellent reaction activity in a lot of catalytic-coupling reactions including Suzuki-Miyaura, Heck, Buchwald-Hartwig, Kumada-Tamao-Corriu, Sonogashira, Negishi and &#x3b1;-ketone arylation reactions, and some reactions even can be carried out with the presence of an extremely low concentration of catalyst, exhibiting favorable industrialization prospect.

N-heterocyclic carbene type palladium catalyst and its preparation method as well as applications

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Shanghai, China

Yucai Cao