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1. 发明授权

US07582710B2 Degassing process 失效
标题翻译：脱气过程
公开(公告)号：US07582710B2
公开(公告)日：2009-09-01
申请号：US10485222
申请日：2002-07-15
申请人： Andrew David Bell , David Andrew Fargie , David Edward Noble , Michael Bernard Power , Iain David Ross
发明人： Andrew David Bell , David Andrew Fargie , David Edward Noble , Michael Bernard Power , Iain David Ross
IPC分类号： C08F2/00 , C08F210/00
CPC分类号： C08F6/001 , C08F10/00 , C08F210/16 , Y10S526/901 , C08L23/00 , C08F2/34 , C08F210/14
摘要： An improved process for the polymerization of olefin monomer selected from (a) ethylene, (b) propylene, (c) mixtures of ethylene and propylene and (d) mixtures of (a), (b) or (c) with one or more alpha-olefins in a fluidized bed gas phase reactor, said process comprising passing a gaseous mixture of said olefin monomers(s) through the fluidized bed under effective polymerization conditions to provide a polymer product containing unreacted monomer(s) and a gaseous effluent stream comprising unreacted monomer(s), removing the polymer product to a degassing vessel, recycling a first portion of the gaseous effluent stream to the fluidized bed and passing a second portion of the gaseous effluent stream to counter currently contact the polymer product in said degassing vessel to produce a polymer product having a reduced amount of unreacted monomer(s), characterized in that the improvements to the process comprise: (i) removing heavy hydrocarbons from the second portion of the effluent stream and returning said hydrocarbons to the first portion of the effluent stream for recycle to the fluidized bed, (ii) removing substantially all of the monomer(s) from the second portion of the effluent stream and returning said monomers(s) to the first portion of the effluent stream for recycle to the fluidized bed, and (iii) recycling the second effluent stream after passage through the degassing vessel to the gaseous effluent stream.
摘要翻译：选自（a）乙烯，（b）丙烯，（c）乙烯和丙烯的混合物和（d）（a），（b）或（c）与一种或多种的混合物的烯烃单体的聚合的改进方法 α-烯烃在流化床气相反应器中，所述方法包括在有效聚合条件下使所述烯烃单体的气态混合物通过流化床，以提供含有未反应单体的聚合物产物和包含将未反应的单体除去聚合物产物至脱气容器，将第一部分气态流出物料流再循环到流化床中，并将第二部分气态流出物流转移至目前与所述脱气容器中的聚合物产物接触，产生具有减少量的未反应单体的聚合物产物，其特征在于该方法的改进包括：（i）从流出物流的第二部分除去重质烃并将所述烃返回到流出物流的第一部分以再循环到流化床，（ii）从流出物流的第二部分基本上除去所有单体，并将所述单体返回到第一流出物流的一部分用于再循环到流化床，和（iii）在通过脱气容器之后再循环第二流出物流至气态流出物流。

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