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公开(公告)号：US5799507A
公开(公告)日：1998-09-01
申请号：US738321
申请日：1996-10-25
CPC分类号： C10L3/10 , C07C7/005 , F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0242 , F25J2200/02 , F25J2200/50 , F25J2200/78 , F25J2205/04 , F25J2210/12 , F25J2240/02
摘要： A process for the recovery of propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is cooled and/or expanded to partially condense it, then separated to provide one or more C.sub.3 containing liquid steams and a first vapor stream. These streams are then directed into a distillation column wherein a second vapor stream is separated to recover a product containing the major portion of the C.sub.3 components and heavier hydrocarbon components. A distillation stream is withdrawn from the column below the feed point of the first vapor stream and is then directed into heat exchange relation with the second vapor stream to cool the distillation stream and condense at least a part of it, forming a condensed stream. At least a portion of the condensed stream is directed to the distillation column as its top feed. The quantities and temperatures of the feeds to the distillation column are effective to maintain the overhead temperature of the distillation column at a temperature whereby the major portion of the desired components is recovered.
摘要翻译： 公开了从烃气流中回收丙烷，丙烯和较重烃组分的方法。 将物流冷却和/或膨胀以使其部分冷凝，然后分离以提供一种或多种含有C3的液体蒸汽和第一蒸气流。 然后将这些物流引入蒸馏塔，其中分离第二蒸气流以回收含有主要部分的C3组分和较重的烃组分的产物。 蒸馏流从第一蒸气流的进料点下方的塔中排出，然后与第二蒸气流导入热交换关系，以冷却蒸馏流并冷凝其至少一部分，形成冷凝流。 冷凝流的至少一部分作为其顶部进料引导至蒸馏塔。 进料到蒸馏塔的数量和温度对于将蒸馏塔的塔顶温度保持在一定温度下是有效的，由此回收所需组分的主要部分。
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公开(公告)号：US5568737A
公开(公告)日：1996-10-29
申请号：US337172
申请日：1994-11-10
CPC分类号： F25J3/0242 , C10G5/06 , F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/72 , F25J2200/76 , F25J2205/04 , F25J2210/06 , F25J2210/12 , F25J2230/08 , F25J2240/02 , F25J2245/02 , F25J2270/02 , Y10S62/901
摘要： A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is divided into first and second streams. The first stream is cooled to condense substantially all of it and is thereafter expanded to the fractionation tower pressure and supplied to the fractionation tower at a first mid-column feed position. The second stream is expanded to the tower pressure and is then supplied to the column at a second mid-column feed position. A recycle stream is withdrawn from the tower overhead after it has been warmed and compressed. The compressed recycle stream is cooled sufficiently to substantially condense it, and is then expanded to the pressure of the distillation column and supplied to the column at a top column feed position. The pressure of the compressed recycle stream and the quantities and temperatures of the feeds to the column are effective to maintain the column overhead temperature at a temperature whereby the major portion of the desired components is recovered.
摘要翻译： 公开了从烃气流中回收乙烷，乙烯，丙烷，丙烯和较重烃组分的方法。 流被分成第一和第二流。 将第一流冷却至基本上全部冷凝，然后将其膨胀至分馏塔压力，并以第一中间塔进料位置供应至分馏塔。 将第二流扩张到塔压力，然后在第二中柱进料位置处供给塔。 在塔顶被加热和压缩之后，再循环流从塔架塔架中取出。 将压缩的再循环料流充分冷却以使其基本冷凝，然后膨胀至蒸馏塔的压力，并在顶部塔进料位置供应至塔。 压缩的再循环料流的压力以及进料塔的进料的数量和温度对塔顶温度的维持是有效的，从而回收主要部分的所需组分。
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公开(公告)号：US5555748A
公开(公告)日：1996-09-17
申请号：US477444
申请日：1995-06-07
IPC分类号： F25J3/02
CPC分类号： F25J3/0238 , F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0242 , F25J2200/02 , F25J2200/70 , F25J2205/04 , F25J2210/06 , F25J2210/12 , F25J2235/60 , F25J2240/02 , F25J2270/90
摘要： A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is cooled to partially condense it, then separated to provide a first vapor stream and a first condensed stream. The first vapor stream is divided into first and second streams, then the first stream is combined with the first condensed stream. The combined stream is cooled and expanded to an intermediate pressure to partially condense it, then separated to provide a second vapor stream and a second condensed stream. The second vapor stream is cooled at the intermediate pressure to condense substantially all of it and is thereafter expanded to the fractionation tower pressure and supplied to the fractionation tower at a top feed position. The second condensed stream is subcooled at the intermediate pressure, expanded to the tower pressure, and is supplied to the column at a first mid-column feed position. The second stream is expanded to the tower pressure and is then supplied to the column at a second mid-column feed position. The quantities and temperatures of the feeds to the column are effective to maintain the column overhead temperature at a temperature whereby the major portion of the desired components is recovered. In an alternative embodiment, the combined stream is cooled at essentially inlet pressure to partially condense it, then separated at pressure to provide the second vapor stream and the second condensed stream.
摘要翻译： 公开了从烃气流中回收乙烷，乙烯，丙烷，丙烯和较重烃组分的方法。 将物流冷却以部分地冷凝，然后分离以提供第一蒸气流和第一冷凝流。 将第一蒸汽流分成第一和第二流，然后将第一流与第一冷凝流组合。 将合并的流冷却并膨胀至中间压力以部分地冷凝，然后分离以提供第二蒸气流和第二冷凝流。 第二蒸气流在中间压力下冷却，以基本上将其全部冷凝，然后膨胀至分馏塔压力，并在顶部进料位置供应至分馏塔。 将第二冷凝物流在中间压力下过冷，膨胀至塔压力，并以第一中柱进料位置供应到塔中。 将第二流扩张到塔压力，然后在第二中柱进料位置处供给塔。 进料到塔的数量和温度对塔顶温度的维持是有效的，从而回收主要部分的所需组分。 在替代实施例中，组合的流在基本入口压力下冷却以部分地冷凝，然后在压力下分离以提供第二蒸气流和第二冷凝流。
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公开(公告)号：US5114451A
公开(公告)日：1992-05-19
申请号：US492548
申请日：1990-03-12
申请人： C. L. Rambo , John D. Wilkinson , Hank M. Hudson
发明人： C. L. Rambo , John D. Wilkinson , Hank M. Hudson
CPC分类号： C10G5/04 , F25J3/0214 , F25J3/0233 , F25J3/0238 , C10G2300/1025 , F25J2200/02 , F25J2230/08 , F25J2230/60 , F25J2290/12
摘要： A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbons from a liquefied natural gas (LNG) stream is disclosed. At least a portion of the LNG feed stream is directed in heat exchange relation with a compressed recycle portion of the fractionation tower overhead, with the warmed LNG stream thereafter supplied to the fractionation tower at a mid-column feed position. The recycle stream is cooled by the LNG stream sufficiently to substantially condense it, and the substantially condensed recycle stream is then supplied to the column at a top column feed position to serve as reflux for the tower. The pressure of the recycle stream and the quantities and temperatures of the feeds to the column are effective to maintain the column overhead temperature at a temperature whereby the major portion of said desired components is recovered in the bottom liquid product from the column.
摘要翻译： 公开了从液化天然气（LNG）流中回收乙烷，乙烯，丙烷，丙烯和较重烃的方法。 LNG进料流的至少一部分与分馏塔顶部的压缩再循环部分以热交换关系的方式引导，随后将加热的LNG流在中间塔进料位置供给至分馏塔。 再循环物流被LNG流充分冷却以使其基本冷凝，然后将基本上冷凝的再循环物流在顶塔进料位置供应至柱，以作塔的回流。 再循环料流的压力以及进料塔的进料量和温度对塔顶温度的维持是有效的，在此温度下，所需组分的主要部分从塔中回收到底部液体产物中。
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