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1. 发明授权

US09939196B2 Hydrocarbon gas processing including a single equipment item processing assembly 有权
公开(公告)号：US09939196B2
公开(公告)日：2018-04-10
申请号：US12792136
申请日：2010-06-02
申请人： Andrew F. Johnke , W. Larry Lewis , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
发明人： Andrew F. Johnke , W. Larry Lewis , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/02
CPC分类号： F25J3/0209 , F25J3/0233 , F25J3/0266 , F25J3/0295 , F25J2200/02 , F25J2200/50 , F25J2200/74 , F25J2200/80 , F25J2205/04 , F25J2215/04 , F25J2235/80 , F25J2240/02 , F25J2240/40 , F25J2260/20 , F25J2260/80 , F25J2270/02 , F25J2270/90 , F25J2290/40 , Y02C10/12
摘要： A process and an apparatus are disclosed for a compact processing assembly to remove carbon dioxide from a hydrocarbon gas stream. The gas stream is cooled, expanded to intermediate pressure, and fed to the top of a mass transfer means. A distillation liquid stream from the mass transfer means is heated in a first heat and mass transfer means to strip out its volatile components and form a bottom liquid product. A distillation vapor stream from the mass transfer means is combined with any vapor in the expanded cooled gas stream, and the combined vapor stream is cooled in a second heat and mass transfer means to partially condense it, forming a condensed stream that is fed to the top of the mass transfer means. A portion of the bottom liquid product is subcooled, expanded to lower pressure, and used to cool the combined vapor stream.

2. 发明授权

US09068774B2 Hydrocarbon gas processing 有权
标题翻译：烃类气体加工
公开(公告)号：US09068774B2
公开(公告)日：2015-06-30
申请号：US13052575
申请日：2011-03-21
申请人： Andrew F. Johnke , W. Larry Lewis , L. Don Tyler , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
发明人： Andrew F. Johnke , W. Larry Lewis , L. Don Tyler , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00 , F25J3/02
CPC分类号： F25J3/0209 , F25J3/0233 , F25J3/0238 , F25J3/0242 , F25J2200/02 , F25J2200/70 , F25J2200/74 , F25J2200/78 , F25J2200/80 , F25J2205/02 , F25J2205/04 , F25J2235/60 , F25J2240/02 , F25J2270/02 , F25J2270/12 , F25J2270/60 , F25J2290/40 , F25J2290/42
摘要： A process and an apparatus are disclosed for a compact processing assembly to recover C2 (or C3) components and heavier hydrocarbon components from a hydrocarbon gas stream. The gas stream is cooled and divided into first and second streams. The first stream is further cooled, expanded to lower pressure, and supplied as a feed between two absorbing means. The second stream is expanded to lower pressure and supplied as a bottom feed to the lower absorbing means. A distillation liquid stream from the bottom of the lower absorbing means is heated in a heat and mass transfer means to strip out its volatile components. A distillation vapor stream from the top of the heat and mass transfer means is cooled by a distillation vapor stream from the top of the upper absorbing means, thereby forming a condensed stream that is supplied as a top feed to the upper absorbing means.
摘要翻译：公开了一种用于紧凑加工组件以从烃气流中回收C2（或C3）组分和较重烃组分的方法和装置。将气流冷却并分成第一和第二流。第一流进一步冷却，膨胀至较低压力，并作为两个吸收装置之间的进料供应。将第二流膨胀到较低压力并作为底部进料供给到下部吸收装置。来自下部吸收装置的底部的蒸馏液体流在热和质量传递装置中被加热以除去其挥发性组分。来自热和质量传递装置的顶部的蒸馏蒸汽流由上吸收装置的顶部的蒸馏蒸气流冷却，从而形成作为顶部进料供应到上部吸收装置的冷凝流。

3. 发明授权

US09057558B2 Hydrocarbon gas processing including a single equipment item processing assembly 有权
标题翻译：烃气处理包括单个设备项目处理组件
公开(公告)号：US09057558B2
公开(公告)日：2015-06-16
申请号：US13053792
申请日：2011-03-22
申请人： Andrew F. Johnke , W. Larry Lewis , L. Don Tyler , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
发明人： Andrew F. Johnke , W. Larry Lewis , L. Don Tyler , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00 , F25J3/02 , C10G5/06
CPC分类号： F25J3/0209 , C10G5/06 , C10G2300/1025 , F25J3/0233 , F25J3/0238 , F25J3/0242 , F25J2200/02 , F25J2200/70 , F25J2200/74 , F25J2200/80 , F25J2205/02 , F25J2205/04 , F25J2210/06 , F25J2235/60 , F25J2240/02 , F25J2270/02 , F25J2270/12 , F25J2270/60 , F25J2290/40 , F25J2290/42
摘要： A process and an apparatus are disclosed for a compact processing assembly to recover C2 (or C3) and heavier hydrocarbon components from a hydrocarbon gas stream. The gas stream is cooled and divided into first and second streams. The first stream is further cooled, expanded to lower pressure, heated, and its liquid fraction is supplied as a first top feed to an absorbing means. The second stream is expanded to lower pressure and supplied as a bottom feed to the absorbing means. A distillation vapor stream from the absorbing means is combined with the vapor fraction of the first stream, then cooled by the expanded first stream to form a condensed stream that is supplied as a second top feed to the absorbing means. A distillation liquid stream from the bottom of the absorbing means is heated in a heat and mass transfer means to strip out its volatile components.
摘要翻译：公开了一种用于紧凑加工组件从烃气流中回收C2（或C3）和较重烃组分的方法和装置。将气流冷却并分成第一和第二流。将第一流进一步冷却，膨胀至较低压力，加热，并将其液体馏分作为第一顶部进料供应至吸收装置。第二流膨胀到较低的压力，并作为底部进料供给到吸收装置。来自吸收装置的蒸馏蒸汽物流与第一物流的蒸气馏分组合，然后通过膨胀的第一物流冷却，形成作为第二顶部进料供给到吸收装置的冷凝物流。来自吸收装置底部的蒸馏液体流在热和质量传递装置中被加热以除去其挥发性组分。

4. 发明授权

US08881549B2 Hydrocarbon gas processing 有权
标题翻译：烃类气体加工
公开(公告)号：US08881549B2
公开(公告)日：2014-11-11
申请号：US12750862
申请日：2010-03-31
申请人： Andrew F. Johnke , W. Larry Lewis , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
发明人： Andrew F. Johnke , W. Larry Lewis , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00 , C10G5/06 , F25J3/02
CPC分类号： C10G5/06 , C10G2400/20 , F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J3/0242 , F25J2200/02 , F25J2200/30 , F25J2200/70 , F25J2200/78 , F25J2200/80 , F25J2205/04 , F25J2210/06 , F25J2210/12 , F25J2240/02 , F25J2270/12 , F25J2270/60 , F25J2290/40 , F25J2290/42 , Y02C20/20
摘要： A process and an apparatus are disclosed for a compact processing assembly to recover propane, propylene, and heavier hydrocarbon components from a hydrocarbon gas stream. The gas stream is cooled, expanded to lower pressure, and fed to an absorbing means. A first distillation liquid stream from the absorbing means is fed to a mass transfer means. A first distillation vapor stream from the mass transfer means is cooled to partially condense it, forming a residual vapor stream and a condensed stream. The condensed stream is supplied as the top feed to the absorbing means. A second distillation vapor stream from the absorbing means is heated by cooling the first distillation vapor stream, combined with the residual vapor stream, and heated by cooling the gas stream. A second distillation liquid stream from the mass transfer means is heated in a heat and mass transfer means to strip out its volatile components.
摘要翻译：公开了用于从烃气流中回收丙烷，丙烯和较重烃组分的紧凑加工组件的方法和设备。将气流冷却，膨胀至较低压力，并送入吸收装置。来自吸收装置的第一蒸馏液流被供给到传质装置。将来自传质装置的第一蒸馏蒸气物流冷却以使其部分冷凝，形成残留的蒸气流和冷凝物流。冷凝流作为顶部进料供给到吸收装置。来自吸收装置的第二蒸馏蒸汽流通过冷却第一蒸馏蒸汽流而加热，与残余蒸气流组合，并通过冷却气流加热。来自质量传递装置的第二蒸馏液体流在热和质量传递装置中被加热以除去其挥发性组分。

5. 发明授权

US09074814B2 Hydrocarbon gas processing 有权
标题翻译：烃类气体加工
公开(公告)号：US09074814B2
公开(公告)日：2015-07-07
申请号：US13051682
申请日：2011-03-18
申请人： Andrew F. Johnke , W. Larry Lewis , L. Don Tyler , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
发明人： Andrew F. Johnke , W. Larry Lewis , L. Don Tyler , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00 , F25J3/02 , C10G5/04 , C10G5/06
CPC分类号： F25J3/0209 , C10G5/04 , C10G5/06 , C10G2300/1025 , F25J3/0233 , F25J3/0242 , F25J2200/02 , F25J2200/30 , F25J2200/74 , F25J2200/78 , F25J2205/02 , F25J2205/04 , F25J2235/60 , F25J2240/02 , F25J2270/12 , F25J2270/60 , F25J2290/40 , Y02P30/10
摘要： A process and an apparatus are disclosed for a compact processing assembly to recover propane, propylene, and heavier hydrocarbon components from a hydrocarbon gas stream. The gas stream is cooled, expanded to lower pressure, and fed to an absorbing means. A first distillation liquid stream from the absorbing means is fed to a mass transfer means. A first distillation vapor stream from the mass transfer means is cooled to partially condense it, forming a residual vapor stream and a condensed stream. The condensed stream is supplied as the top feed to the absorbing means. A second distillation vapor stream from the absorbing means is heated by cooling the first distillation vapor stream, combined with the residual vapor stream, and heated by cooling the gas stream. A second distillation liquid stream from the mass transfer means is heated in a heat and mass transfer means to strip out its volatile components.
摘要翻译：公开了用于从烃气流中回收丙烷，丙烯和较重烃组分的紧凑加工组件的方法和设备。将气流冷却，膨胀至较低压力，并送入吸收装置。来自吸收装置的第一蒸馏液流被供给到传质装置。将来自传质装置的第一蒸馏蒸气物流冷却以使其部分冷凝，形成残留的蒸气流和冷凝物流。冷凝流作为顶部进料供给到吸收装置。来自吸收装置的第二蒸馏蒸汽流通过冷却第一蒸馏蒸汽流而加热，与残余蒸气流组合，并通过冷却气流加热。来自质量传递装置的第二蒸馏液体流在热和质量传递装置中被加热以除去其挥发性组分。

6. 发明授权

US09052136B2 Hydrocarbon gas processing 有权
标题翻译：烃类气体加工
公开(公告)号：US09052136B2
公开(公告)日：2015-06-09
申请号：US13048315
申请日：2011-03-15
申请人： Andrew F. Johnke , W. Larry Lewis , L. Don Tyler , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
发明人： Andrew F. Johnke , W. Larry Lewis , L. Don Tyler , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00 , F25J3/02 , C10G5/06
CPC分类号： F25J3/0209 , C10G5/06 , C10G2300/1025 , F25J3/0233 , F25J3/0238 , F25J3/0242 , F25J2200/02 , F25J2200/70 , F25J2200/74 , F25J2200/80 , F25J2205/02 , F25J2205/04 , F25J2210/06 , F25J2235/60 , F25J2240/02 , F25J2270/02 , F25J2270/12 , F25J2270/60 , F25J2290/40 , F25J2290/42
摘要： A process and an apparatus are disclosed for a compact processing assembly to recover C2 components (or C3 components) and heavier hydrocarbon components from a hydrocarbon gas stream. The gas stream is cooled and divided into first and second streams. The first stream is further cooled to condense substantially all of it, expanded to lower pressure, and supplied as top feed to an absorbing means. The second stream is also expanded to lower pressure and fed to the bottom of the absorbing means. A distillation vapor stream from the absorbing means is heated by cooling the gas stream and the first stream. A distillation liquid stream from the absorbing means is fed to a heat and mass transfer means to heat it and strip out its volatile components while cooling the gas stream. The absorbing means and the heat and mass transfer means are housed in the processing assembly.
摘要翻译：公开了一种用于紧凑加工组件以从烃气流中回收C2组分（或C3组分）和较重烃组分的方法和设备。将气流冷却并分成第一和第二流。将第一流进一步冷却以基本上将其全部冷凝，膨胀至较低压力，并作为顶部进料供应至吸收装置。第二流还被扩展到较低的压力并且被馈送到吸收装置的底部。通过冷却气流和第一流来加热来自吸收装置的蒸馏蒸汽流。来自吸收装置的蒸馏液体物流被供给到热和质量传递装置以加热它并且在冷却气流的同时剥离其挥发性组分。吸收装置和热传质装置容纳在处理组件中。

7. 发明申请

US20110067441A1 Hydrocarbon Gas Processing 审中-公开
标题翻译：烃气处理
公开(公告)号：US20110067441A1
公开(公告)日：2011-03-24
申请号：US12868993
申请日：2010-08-26
申请人： Tony L. Martinez , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
发明人： Tony L. Martinez , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00
CPC分类号： F25J3/0209 , F25J3/0233 , F25J3/0238 , F25J2200/02 , F25J2200/30 , F25J2200/74 , F25J2200/76 , F25J2200/78 , F25J2200/90 , F25J2200/92 , F25J2200/94 , F25J2205/04 , F25J2210/06 , F25J2210/60 , F25J2215/60 , F25J2230/08 , F25J2235/60 , F25J2240/02 , F25J2240/40 , F25J2270/02 , F25J2270/12 , F25J2290/12 , F25J2290/40
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 and divided into first and second streams. The first stream is further cooled to condense substantially all of it and is thereafter expanded to the fractionation tower pressure, heated, and supplied to the fractionation tower at an upper mid-column feed position. The second stream is expanded to the tower pressure and is then supplied to the column at a mid-column feed position. A distillation vapor stream is withdrawn from the column above the feed point of the second stream and is then directed into heat exchange relation with the expanded cooled first stream and the tower overhead vapor stream to cool the distillation vapor 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 fractionation tower as its top feed. The quantities and temperatures of the feeds to the fractionation tower are effective to maintain the overhead temperature of the fractionation tower 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。将流冷却并分成第一和第二流。将第一流进一步冷却以基本上将其全部冷凝，然后将其膨胀至分馏塔的压力，加热，并在上中间塔进料位置供应至分馏塔。将第二流扩张到塔压力，然后在中间列进料位置供给塔。蒸馏蒸气流从第二料流的进料点上方的塔中取出，然后与膨化的冷却的第一料流和塔顶塔顶蒸气料流导热至热交换关系，以冷却蒸馏蒸汽流并冷凝至少一部分它，形成一个冷凝的流。冷凝流的至少一部分作为顶部进料被引导至分馏塔。进入分馏塔的进料的量和温度对于将分馏塔的塔顶温度维持在所需组分的主要部分被回收的温度是有效的。

8. 发明申请

US20100287983A1 Hydrocarbon Gas Processing 有权
标题翻译：烃气处理
公开(公告)号：US20100287983A1
公开(公告)日：2010-11-18
申请号：US12772472
申请日：2010-05-03
申请人： Andrew F. Johnke , W. Larry Lewis , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
发明人： Andrew F. Johnke , W. Larry Lewis , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00
CPC分类号： F25J3/0238 , C10G5/06 , C10G2400/20 , F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0242 , F25J2200/02 , F25J2200/30 , F25J2200/70 , F25J2200/78 , F25J2200/80 , F25J2205/04 , F25J2210/06 , F25J2210/12 , F25J2240/02 , F25J2270/12 , F25J2270/60 , F25J2290/40 , F25J2290/42 , Y02C20/20
摘要： A process and an apparatus are disclosed for a compact processing assembly to recover ethane, ethylene, and heavier hydrocarbon components from a hydrocarbon gas stream. The gas stream is cooled and divided into first and second streams. The first stream is further cooled, expanded to lower pressure, heated, and its liquid fraction is supplied as a first top feed to an absorbing means. The second stream is expanded to lower pressure and supplied as a bottom feed to the absorbing means. A distillation vapor stream from the absorbing means is combined with the vapor fraction of the first stream, then cooled by the expanded first stream to form a condensed stream that is supplied as a second top feed to the absorbing means. A distillation liquid stream from the bottom of the absorbing means is heated in a heat and mass transfer means to strip out its volatile components.
摘要翻译：公开了一种用于紧凑加工组件从烃气流中回收乙烷，乙烯和较重烃组分的方法和装置。将气流冷却并分成第一和第二流。将第一流进一步冷却，膨胀至较低压力，加热，并将其液体馏分作为第一顶部进料供应至吸收装置。第二流膨胀到较低的压力，并作为底部进料供给到吸收装置。来自吸收装置的蒸馏蒸汽物流与第一物流的蒸气馏分组合，然后通过膨胀的第一物流冷却，形成作为第二顶部进料供给到吸收装置的冷凝物流。来自吸收装置底部的蒸馏液体流在热和质量传递装置中被加热以除去其挥发性组分。

9. 发明申请

US20100236285A1 Hydrocarbon Gas Processing 有权
标题翻译：烃气处理
公开(公告)号：US20100236285A1
公开(公告)日：2010-09-23
申请号：US12689616
申请日：2010-01-19
申请人： Andrew F. Johnke , Larry Lewis , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
发明人： Andrew F. Johnke , Larry Lewis , John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J3/00
CPC分类号： F25J3/0209 , C10G5/06 , C10G2300/1025 , C10L3/10 , F25J3/0233 , F25J3/0238 , F25J3/0242 , F25J2200/02 , F25J2200/70 , F25J2205/04 , F25J2210/06 , F25J2240/02 , F25J2270/12 , F25J2270/60 , F25J2290/40 , F25J2290/42 , F28D7/0066 , F28D7/08 , G05D9/00 , G05D27/00
摘要： A process and an apparatus are disclosed for the recovery of ethane, ethylene, propane, propylene, and heavier hydrocarbon components from a hydrocarbon gas stream in a compact processing assembly. The gas stream is cooled and divided into first and second streams. The first stream is further cooled to condense substantially all of it and is thereafter expanded to lower pressure and supplied as the top feed to an absorbing means inside the processing assembly. The second stream is also expanded to lower pressure and supplied as the bottom feed to the absorbing means. A distillation vapor stream is collected from the upper region of the absorbing means and directed into one or more heat exchange means inside the processing assembly to heat it while cooling the gas stream and the first stream. A distillation liquid stream is collected from the lower region of the absorbing means and directed into a heat and mass transfer means inside the processing assembly to heat it and strip out its volatile components while cooling the gas stream. The quantities and temperatures of the feeds to the absorbing means are effective to maintain the temperature of the upper region of the absorbing means at a temperature whereby the major portions of the desired components are recovered in the stripped distillation liquid stream.
摘要翻译：公开了用于从紧凑加工组件中的烃气流中回收乙烷，乙烯，丙烷，丙烯和较重烃组分的方法和装置。将气流冷却并分成第一和第二流。将第一流进一步冷却以基本上将其全部冷凝，然后将其膨胀至较低压力，并将其作为顶部进料供给到处理组件内部的吸收装置。第二流还被扩展成较低的压力并作为底部进料供应到吸收装置。蒸馏蒸气流从吸收装置的上部区域收集并且被引导到处理组件内部的一个或多个热交换装置中，以在冷却气体流和第一流的同时对其进行加热。从吸收装置的下部区域收集蒸馏液体流，并将其导入处理组件内部的热和质量传递装置，以加热它并在冷却气流的同时剥离其挥发性组分。到吸收装置的进料的量和温度对于将吸收装置的上部区域的温度保持在所需组分的主要部分在汽提的蒸馏液体流中回收的温度是有效的。

10. 发明授权

US07204100B2 Natural gas liquefaction 有权
标题翻译：天然气液化
公开(公告)号：US07204100B2
公开(公告)日：2007-04-17
申请号：US10840072
申请日：2004-05-04
申请人： John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
发明人： John D. Wilkinson , Joe T. Lynch , Hank M. Hudson , Kyle T. Cuellar
IPC分类号： F25J1/00 , F25J3/00
CPC分类号： F25J1/0216 , F25J1/0022 , F25J1/0035 , F25J1/0045 , F25J1/0052 , F25J1/0057 , F25J1/0205 , F25J1/0214 , F25J1/0239 , F25J3/0209 , F25J3/0233 , F25J3/0238 , F25J3/0242 , F25J3/0247 , F25J2200/02 , F25J2200/04 , F25J2200/30 , F25J2200/70 , F25J2200/74 , F25J2200/78 , F25J2205/04 , F25J2230/08 , F25J2230/20 , F25J2230/60 , F25J2240/02 , F25J2240/30 , F25J2270/02 , F25J2270/12 , F25J2270/60 , F25J2270/66 , F25J2290/40
摘要： A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled and divided into first and second streams. The first stream is further cooled to condense substantially all of it, expanded to an intermediate pressure, and then supplied to a distillation column at a first mid-column feed position. The second stream is also expanded to intermediate pressure and is then supplied to the column at a second lower mid-column feed position. A distillation stream is withdrawn from the column below the feed point of the second stream and is cooled to condense at least a part of it, forming a reflux stream. At least a portion of the reflux stream is directed to the distillation column as its top feed. The bottom product from this distillation column preferentially contains the majority of any hydrocarbons heavier than methane that would otherwise reduce the purity of the liquefied natural gas. The residual gas stream from the distillation column is compressed to a higher intermediate pressure, cooled under pressure to condense it, and then expanded to low pressure to form the liquefied natural gas stream.
摘要翻译：公开了一种液化天然气与生产主要包含比甲烷重的烃的液体流的方法。在此过程中，待液化的天然气流被部分冷却并分成第一和第二流。将第一流进一步冷却以基本上将其全部冷凝，膨胀至中间压力，然后在第一中间柱进料位置供给蒸馏塔。第二个流还被扩展到中间压力，然后在第二个较低的中间列进料位置被供给到塔中。蒸馏物流从第二料流进料点下方的塔中取出，冷却至少部分冷凝，形成回流。至少一部分回流物流作为其顶部进料引导至蒸馏塔。来自该蒸馏塔的底部产物优先含有大于甲烷重量的任何烃类，否则会降低液化天然气的纯度。将来自蒸馏塔的残余气流压缩至更高的中间压力，在压力下冷却以冷凝，然后膨胀至低压以形成液化的天然气流。

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