Polymer-supported metallocene catalysts for gas-phase ethylene/1-hexene polymerization

被引:0
|
作者
Wu, L [1 ]
Zhou, JM [1 ]
Lynch, DT [1 ]
Wanke, SE [1 ]
机构
[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada
关键词
metallocene catalysts (supported); supports (polymeric); gas-phase polymerization; morphology (polymer); comonomer incorporation;
D O I
暂无
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The ethylene and ethylene/1-hexene polymerization activities of seven catalysts, consisting of (n-BUCP)(2)ZrCl2/MAO supported on five different types of spherical polymer beads, were determined for gas-phase polymerization at 1.4 MPa ethylene pressure and initial I-hexene concentrations of up to 40 Mol/M3. The catalytic activity for all the catalysts was highest at 80-90 degrees C. Copolymerization activities were higher than homopolymerization activities; the average rates for I h runs ranged from 0.1 to 4.1 and from 2.4 to 13 kg PE/(mol Zr s MPa C2H4) for homo- and copolymerization, respectively. Specific rates decreased with increasing Zr content for copolymerization (range of Zr concentration 0.21-0.39 mass%). The rates of 1-hexene incorporation decreased with increasing Al:Zr ratios (range of Al:Zr ratios 100370). Most of the catalysts produced spherical copolymer particles without the production of fines. Molar masses of copolymers were lower than those of homopolymers, but they did not change appreciably with changes in 1-hexene concentration. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:180 / 191
页数:12
相关论文
共 50 条
  • [1] Polymer-supported metallocene catalysts for gas-phase ethylene polymerization
    J. S. Chung
    G. Tairova
    Y. Zhang
    J. C. Hsu
    K. B. McAuley
    D. W. Bacon
    [J]. Korean Journal of Chemical Engineering, 2002, 19 : 597 - 600
  • [2] Polymer-supported metallocene catalysts for gas-phase ethylene polymerization
    Chung, JS
    Tairova, G
    Zhang, Y
    Hsu, JC
    McAuley, KB
    Bacon, DW
    [J]. KOREAN JOURNAL OF CHEMICAL ENGINEERING, 2002, 19 (04) : 597 - 600
  • [3] Gas-phase ethylene polymerization over polymer-supported metallocene catalysts
    Zhou, JM
    Li, NH
    Bu, NY
    Lynch, DT
    Wanke, SE
    [J]. JOURNAL OF APPLIED POLYMER SCIENCE, 2003, 90 (05) : 1319 - 1330
  • [4] Effects of aluminum alkyls on ethylene/1-hexene polymerization with supported metallocene/MAO catalysts in the gas phase
    Hammawa, H
    Mannan, TM
    Lynch, DT
    Wanke, SE
    [J]. JOURNAL OF APPLIED POLYMER SCIENCE, 2004, 92 (06) : 3549 - 3560
  • [5] Influence of support friability and concentration of α-olefins on gas-phase ethylene polymerization over polymer-supported metallocene/methylaluminoxane catalysts
    Hammawa, Hassan
    Wanke, Sieghard E.
    [J]. JOURNAL OF APPLIED POLYMER SCIENCE, 2007, 104 (01) : 514 - 527
  • [6] Gas-phase polymerization of ethylene using supported metallocene catalysts: Study of polymerization conditions
    Tannous, K
    Soares, JBP
    [J]. MACROMOLECULAR CHEMISTRY AND PHYSICS, 2002, 203 (13) : 1895 - 1905
  • [7] Copolymerization of ethylene and 1-hexene with supported metallocene catalysts: Effect of support treatment
    Kim, JD
    Soares, JBP
    [J]. MACROMOLECULAR RAPID COMMUNICATIONS, 1999, 20 (06) : 347 - 350
  • [8] Kinetic study of olefin polymerization with a supported metallocene catalyst. II. Ethylene/1-hexene copolymerization in gas phase
    Chakravarti, S
    Ray, WH
    [J]. JOURNAL OF APPLIED POLYMER SCIENCE, 2001, 80 (08) : 1096 - 1119
  • [9] Porous Organic Polymers-Supported Metallocene Catalysts for Ethylene/1-Hexene Copolymerization
    Wang, Xiong
    Han, Xiaoyu
    Ren, Feng
    Xu, Renwei
    Bai, Yongxiao
    [J]. CATALYSTS, 2018, 8 (04):
  • [10] MAO-free metallocene based catalysts in high pressure polymerization of ethylene and 1-hexene
    Götz, C
    Luft, G
    Rau, A
    Schmitz, S
    [J]. CHEMICAL ENGINEERING & TECHNOLOGY, 1998, 21 (12) : 954 - +