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1. 发明申请

WO2013110718A1 PROCESS FOR PURGING PROPANE IN A POLYPROPYLENE MANUFACTURING PROCESS 审中-公开
标题翻译：聚丙烯制造工艺中丙烯的制备方法
公开(公告)号：WO2013110718A1
公开(公告)日：2013-08-01
申请号：PCT/EP2013/051362
申请日：2013-01-24
申请人： TOTAL RESEARCH & TECHNOLOGY FELUY
发明人： JANSSENS, Els , AVAULLEE, Laurent , RICHET, Marc
IPC分类号： C08F6/00 , B01D53/22 , B01J19/24 , C08F210/06
CPC分类号： C08F110/06 , C08F6/001 , C08L23/10
摘要： The present invention relates to the purging of propane in a polypropylene manufacturing process comprising, a) polymerizing propylene in a polymerization zone, b) withdrawing from said polymerization zone an effluent comprising polypropylene, propylene, propane and optionally a solvent, c) sending said effluent to a separation zone thereby producing polypropylene, optionally the solvent and a stream comprising propylene and propane, d) optionally recycling the solvent to the polymerization zone, e) sending said propylene and propane stream to a splitter thereby producing an overhead consisting essentially of propylene recycled to the polymerization zone and a rich propane bottom stream comprising a minor part of propylene, f) sending the bottom stream to a membrane separation zone thereby producing a permeate having an enhanced propylene content and a reduced propane content and a purge having an enhanced propane content and a reduced propylene content, g) recycling the permeate to the polymerization zone. In an embodiment the bottom stream produced in the splitter of stepe) is washed in a scrubber to remove contaminants and the overhead of said scrubber is sent to the membrane separation zone. The present invention is also the debottlenecking of a polypropylene manufacturing facility comprising, a polymerization zone, a separation zone to recover the polypropylene, optionally the solvent and a stream comprising propylene and propane and a splitter to separate propane and propylene, wherein, a membrane separation zone is provided, said membrane separation zone is fed with the splitter bottom thereby producing a purge and a permeate recycled to the polymerization zone. In an embodiment a scrubber is inserted between the splitter bottoms and the membrane separation zone stream to wash the splitter bottom stream to remove contaminants and the overhead of said scrubber is sent to the membrane separation zone.
摘要翻译：本发明涉及在聚丙烯制造方法中丙烷的清洗，其包括：a）在聚合区中聚合丙烯，b）从所述聚合区中排出包含聚丙烯，丙烯，丙烷和任选的溶剂的流出物，c）将所述流出物分离区，从而产生聚丙烯，任选地溶剂和包含丙烯和丙烷的料流，d）任选地将溶剂再循环到聚合区，e）将所述丙烯和丙烷料流送到分离器，从而产生基本上由丙烯再循环聚合区和富丙烷底部料流，其包含少部分丙烯，f）将底部料流送至膜分离区，由此产生具有增强的丙烯含量和降低的丙烷含量的渗透物，以及具有增强的丙烷含量的吹扫和降低的丙烯含量，g）将渗透物再循环到第聚合区。在一个实施方案中，在步骤中的分离器中产生的底部流在洗涤器中洗涤以除去污染物，并且将所述洗涤器的塔顶馏出物送至膜分离区。本发明还涉及一种聚丙烯制造设备的消除瓶颈，其包括聚合区，回收聚丙烯的分离区，任选的溶剂和包含丙烯和丙烷的流以及用于分离丙烷和丙烯的分离器，其中，膜分离区域，所述膜分离区被供给分离器底部，从而产生再循环到聚合区的吹扫和渗透物。在一个实施例中，将洗涤器插入在分离器底部和膜分离区流之间以洗涤分离器底部流以除去污染物，并将所述洗涤器的塔顶物质送入膜分离区。

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