发明名称 |
PROCESS AND DEVICE FOR THE GAS-PHASE POLYMERISATION OF ALPHA-OLEFINS |
摘要 |
PROCESS AND DEVICE FOR THE GAS PHASE POLYMERIZATION OF ALPHA-OLEFINS The present invention relates to a process and a device for polymerizing alpha-olefins such as ethylene or propylene in a gas phase. The device comprises a gas phase polymerization reactor (5) into which a suspension of prepolymer particles in liquid saturated hydrocarbon(s) is continuously introduced. The prepolymer suspension is prepared in one or more prepolymerization vessels (14) and is continuously passed to a post-treatment unit comprising a degassing means (10) wherein most of the dissolved unreacted olefinic monomer(s) is separated. Preferably, the post-treatment unit may comprise a particle separation means (11) for removing the finest and/or coarsest prepolymer particles from the suspension and/or a concentration means (11a) for concentrating the suspension. High activity catalyst can be used in the process with reduced amounts of prepolymer agglomerates. Prepolymer can be obtained with a constant quality and a desired size.
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申请公布号 |
CA2037175(A1) |
申请公布日期 |
1991.09.10 |
申请号 |
CA19912037175 |
申请日期 |
1991.02.27 |
申请人 |
BP CHEMICALS LIMITED |
发明人 |
BRULE, DANIEL;IFFLY, JEAN-MARIE;RAUFAST, CHARLES |
分类号 |
C08F10/02;B01J8/00;B01J8/24;B01J19/18;C08F2/00;C08F2/01;C08F2/34;C08F10/00;(IPC1-7):C08F2/34;B01J8/08 |
主分类号 |
C08F10/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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