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31. 发明申请

US20090326169A1 Process for the Preparation of Ethylene Polymers using a Number of Reactors Arranged in Series 有权
标题翻译：使用一系列反应器串联制备乙烯聚合物的方法
公开(公告)号：US20090326169A1
公开(公告)日：2009-12-31
申请号：US12295249
申请日：2007-03-29
申请人： Mieke Dams , Daniel Siraux
发明人： Mieke Dams , Daniel Siraux
IPC分类号： C08F2/00
CPC分类号： C08F210/16 , C08F4/65912 , C08F4/65927 , C08F10/00 , C08F110/02 , C08F4/65916 , C08F2/001 , C08F2500/12 , C08F210/14
摘要： The present invention relates to a process for the preparation of ethylene polymers using a number of reactors arranged in series comprising the steps in which a) ethylene, a diluent, a catalyst, a co-catalyst and optionally comonomers and hydrogen are introduced into a first reactor, b) polymerization of ethylene and optionally comonomers is carried out in the reaction mixture of said first reactor to make ethylene polymers, c) reaction mixture is discharged from said first reactor, d) said reaction mixture and fresh ethylene and optionally comonomers and hydrogen are introduced into the consecutive reactor to make additional ethylene polymers, e) said reaction mixture is discharged from said consecutive reactor and introduced into the further consecutive reactor, if any, with fresh ethylene and optionally comonomers and hydrogen to make additional ethylene polymers, steps c) and d) are repeated until the last reactor of the series, f) reaction mixture is discharged from last reactor of the series and ethylene polymers are recovered, wherein, additional co-catalyst is injected in at least a subsequent reactor of the series. Advantage of the process of the present invention is mainly to decrease catalyst consumption for the same polyethylene production, in other words to increase the productivity. In a most preferred embodiment the process of the present invention is carried out in two loop reactors under slurry conditions.
摘要翻译：本发明涉及使用串联排列的多个反应器制备乙烯聚合物的方法，包括以下步骤：其中a）将乙烯，稀释剂，催化剂，助催化剂和任选的共聚单体和氢引入第一反应器，b）乙烯和任选的共聚单体的聚合在所述第一反应器的反应混合物中进行以制备乙烯聚合物，c）从所述第一反应器排出反应混合物，d）所述反应混合物和新鲜的乙烯和任选的共聚单体和氢引入连续的反应器以制备另外的乙烯聚合物，e）将所述反应混合物从所述连续的反应器中排出，并且用新鲜的乙烯和任选的共聚单体和氢气引入进一步连续的反应器（如果有的话）以制备另外的乙烯聚合物，步骤c ）和d）重复直到系列的最后一个反应器，f）反应混合物从最后一个反应器排出的系列和乙烯聚合物被回收，其中在至少后续的该系列反应器中注入另外的助催化剂。本发明方法的优点主要是减少相同聚乙烯生产的催化剂消耗，换句话说是提高生产率。在最优选的实施方案中，本发明的方法在浆液条件下在两个环管反应器中进行。

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