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公开(公告)号：US09309168B2
公开(公告)日：2016-04-12
申请号：US13738631
申请日：2013-01-10
摘要： Processes for forming propylene are described herein. The processes generally include reacting a metathesis feed stream including butene with ethylene in the presence of a first metathesis catalyst via a first metathesis reaction to form a first metathesis product stream including propylene, ethylene, butene, and C5+ olefins; separating at least a portion of the propylene and ethylene from the first metathesis product stream to form a first overhead stream and to form a first de-propenized bottoms stream including butene and C5+ olefins; reacting at least a portion of the first de-propenized bottoms stream with ethylene in the presence of a second metathesis catalyst via a second metathesis reaction to form a second metathesis product stream including propylene, ethylene, butene, and C5+ olefins; and separating at least a portion of the propylene and ethylene from the second metathesis product stream to form a second overhead stream; and recovering propylene from the first overhead stream, the second overhead stream or combinations thereof.
摘要翻译： 本文描述了形成丙烯的方法。 所述方法通常包括在第一复分解催化剂存在下通过第一复分解反应使包含丁烯与乙烯的复分解进料流与包含丙烯，乙烯，丁烯和C5 +烯烃的第一复分解产物流反应; 从第一复分解产物流中分离出至少一部分丙烯和乙烯以形成第一塔顶馏出物流并形成包含丁烯和C5 +烯烃的第一脱气塔底物流; 在第二复分解催化剂存在下，通过第二复分解反应使至少一部分第一脱气塔底物流与乙烯反应，形成包含丙烯，乙烯，丁烯和C5 +烯烃的第二复分解产物流; 以及将所述丙烯和乙烯的至少一部分与所述第二复分解产物流分离以形成第二塔顶流; 以及从第一塔顶流，第二塔顶流或其组合回收丙烯。
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公开(公告)号：US09688591B2
公开(公告)日：2017-06-27
申请号：US13738685
申请日：2013-01-10
摘要： Ethylene separation processes are described herein. The ethylene separation processes generally include introducing a feed stream including ethylene and butene into a de-ethenizer; and separating the ethylene from the butene via fractional distillation within the de-ethenizer to form an overhead stream including separated ethylene and a bottoms stream including separated butene, wherein the de-ethenizer operates at a pressure of less than 350 psig.
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公开(公告)号：US08222474B2
公开(公告)日：2012-07-17
申请号：US12454778
申请日：2009-05-22
IPC分类号： C07C7/04
CPC分类号： C07C11/167 , C07C7/005 , C07C7/08
摘要： A method for the solvent extraction of 1,3-butadiene from a mixture of C4 hydrocarbons that employs a distillation tower to produce the desired 1,3-butadiene product as an overhead and a separate bottoms stream that is removed from and not recycled in the solvent extraction process.
摘要翻译： 从使用蒸馏塔产生所需的1,3-丁二烯产物作为塔顶馏出物的C4烃的混合物溶剂萃取1,3-丁二烯的方法，以及分离的底部物流，其从 溶剂萃取工艺。
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公开(公告)号：US07718841B2
公开(公告)日：2010-05-18
申请号：US12157300
申请日：2008-06-09
摘要： A method for reducing corrosion in a diolefin extractive distillation process comprising preventing the formation of ammonium carbonate by promoting the formation of a carbonate salt that does not dissociate in the ammonium carbonate dissociation temperature range of that extractive distillation process.
摘要翻译： 一种用于减少二烯萃取蒸馏方法中的腐蚀的方法，包括通过促进在该萃取蒸馏过程的碳酸铵解离温度范围内不解离的碳酸盐的形成来防止形成碳酸铵。
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