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Simulation of Particle Growth in gas phase polymerization of Butadiene by the Multigrain Model

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Chinese Journal of Chemical Engineering 2001年第4期9卷 367-375页

作者：孙建中赵军子何斯征周其云 Zhejiang Univ Dept Chem Engn Hangzhou 310027 Peoples R China

gas phase polymerization of butadiene by neodymium catalyst was modeled. The effects of mass and heat transfer resistances in the external boundary layer and within particles, sorption of butadiene in polybutadiene,and deactivation of active sites on polymer particle growth and morphology were studied. Simulation results show that the effects of intraparticle mass and heat transfer resistances on the growth rate of polymer particles are insignificant, and that there is no significant effect of mass transfer resistance on the morphology of polymer *** simulation results were compared with the experimental results.

关键词： butadiene gas phase polymerization modeling particle growth multigrain model

Studies on Macro-kinetics of gas phase polymerization of Butadiene with Rare-earth Catalyst

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Chinese Journal of Chemical Engineering 2002年第3期10卷 328-332页

作者：方东宇孙建中周其云冯博 Department of Chemical Engineering Zhejiang University Hangzhou 310027 Department of Chemical Engineering Zhejiang University Hongzhou 310027

The study of the kinetics of gas phase polymerization of butadiene with heterogeneous catalyst based on neodymium(Nd) was carried *** effects of reaction temperature,reaction pressure,dispersing medium, and types of catalyst on kinetics of polymerization were investigated .A kinetic model with two kinds of active sites was *** results show that the effects of the reaction temperature and the types of dispersing medium and catalyst on the kinetic performance of polymerization are significant,and that the combined model of first and second order decay of active site of catalyst can be used to describe the phenomena.

关键词： butadiene gas phase polymerization kinetics model

gas phase Polymerisation of Ethylene with Supported Titanium-Nickel Catalysts

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Chinese Chemical Letters 2000年第1期11卷 85-86页

作者： Jin Min HU Hai Hua WANG Jiang Li WU Qi Xing ZHANG(Institute of polymer Science. Zhongshan University, Guangzhou 510275) Institute of Polymer Science Zhongshan University Guangzhou 510275 China

A new ditransition-metal catalyst system TiC1.-NiC1_2,/MgC1_2,-SiO_2,/AlR_3 was prepared. gas phase polymerization of ethylene with the catalysts has been studied. The kinetic curves of gas phase polymerization showed a decline. The catalysts efficiency and polymerization reaction rates have a optimum value when Ni content of the catalysts was 12.5%(mol).The products obtained are branched polyethylene.

关键词： gas phase polymerization NiCl_2 catalysts branched polyethylene.