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1. 发明授权

US5934104A Multiple column nitrogen generators with oxygen coproduction 失效
标题翻译：具有氧气共同生产的多塔氮气发生器
公开(公告)号：US5934104A
公开(公告)日：1999-08-10
申请号：US88993
申请日：1998-06-02
申请人： Zbigniew Tadeusz Fidkowski , Donn Michael Herron , Jeffrey Alan Hopkins
发明人： Zbigniew Tadeusz Fidkowski , Donn Michael Herron , Jeffrey Alan Hopkins
IPC分类号： F25J3/00 , F25J3/04
CPC分类号： F25J3/04872 , F25J3/04224 , F25J3/04284 , F25J3/04303 , F25J3/04321 , F25J3/04351 , F25J3/04442 , F25J3/04454 , F25J2200/20 , F25J2200/34 , F25J2200/50 , F25J2200/54 , F25J2215/52 , F25J2215/56 , F25J2235/42 , F25J2245/50 , F25J2250/20 , Y10S62/90
摘要： The present invention is an improvement to a nitrogen generator enabling the process to efficiently coproduce oxygen with low recovery, typically less than 70% and preferably less than 55%, in addition to the primary product, nitrogen. In the nitrogen generator process, air is distilled in a distillation column system having a higher pressure column and a lower pressure column. The feed air is compressed, treated to remove water and carbon dioxide, cooled to near its dew point and fed to the higher pressure column of the distillation column system. The nitrogen product is produced by removing an overhead vapor stream from at least one of the columns of the distillation column system. At least one oxygen-enriched stream is removed from the lower pressure column. The improvement is characterized in that: (a) the oxygen-enriched stream is removed from the lower pressure column at a location that is at or below the feed to the lower pressure column; (b) feeding the removed oxygen-enriched stream to a supplemental distillation column for separation into an oxygen bottoms and a waste overhead; (c) providing boilup to the supplemental distillation column and (d) removing an oxygen stream (vapor or liquid) from the bottom of the supplemental distillation column as an oxygen product.
摘要翻译：本发明是对氮气发生器的改进，使得该方法除了主要产物氮之外，能够以低回收率（通常小于70％，优选小于55％）有效地共生氧气。在氮气发生器过程中，在具有较高压力塔和低压塔的蒸馏塔系统中蒸馏空气。进料空气被压缩，处理以除去水和二氧化碳，冷却到接近其露点并进料到蒸馏塔系统的高压塔中。通过从蒸馏塔系统的塔中的至少一个塔除去顶部蒸汽流来生产氮气产物。从低压塔中除去至少一个富氧流。其改进的特征在于：（a）在低压塔的进料处于或低于低压塔的进料位置，从低压塔中除去富氧料流; （b）将去除的富氧物流送入补充蒸馏塔以分离成氧底部和废物塔顶; （c）向补充蒸馏塔提供煮沸和（d）从补充蒸馏塔的底部除去作为氧产物的氧气流（蒸汽或液体）。

2. 发明授权

US5701764A Process to produce moderate purity oxygen using a double column plus an auxiliary low pressure column 失效
标题翻译：使用双柱加辅助低压塔生产中等纯度氧的方法
公开(公告)号：US5701764A
公开(公告)日：1997-12-30
申请号：US692990
申请日：1996-08-06
申请人： Rakesh Agrawal , Zbigniew Tadeusz Fidkowski , Donn Michael Herron
发明人： Rakesh Agrawal , Zbigniew Tadeusz Fidkowski , Donn Michael Herron
IPC分类号： F25J3/04 , F25J3/00
CPC分类号： F25J3/04303 , F25J3/0409 , F25J3/04418 , F25J3/0443 , F25J3/04872 , F25J2200/32 , Y10S62/939
摘要： A process is set forth for the cryogenic distillation of an air feed to produce an oxygen product, particularly an oxygen product at moderate purity (80-99%, preferably 85-95%). The process uses an auxiliary low pressure column in addition to the conventional high pressure column and low pressure column. The auxiliary low pressure column, which is preferably operated at the same pressure as the main low pressure column and which is heat integrated with the top of the high pressure column by means of its bottom reboiler/condenser, pretreats the crude liquid oxygen from the bottom of the high pressure column. The resulting overhead vapor stream and bottom stream are subsequently fed to the main low pressure column. Preferably, the bottom stream is fed to the main low pressure column in a state which is at least partially vapor.
摘要翻译：阐述了用于空气进料的低温蒸馏以产生中等纯度（80-99％，优选85-95％）的氧产物，特别是氧产物的方法。该方法除常规高压塔和低压塔外还使用辅助低压塔。辅助低压塔优选在与主低压塔相同的压力下操作，并通过其底部再沸器/冷凝器与高压塔的顶部热积分，从底部预处理粗液氧的高压塔。随后将得到的塔顶蒸气流和塔底物流送入主低压塔。优选地，底部物流以至少部分蒸气的状态进料到主低压塔。

3. 发明授权

US06009723A Elevated pressure air separation process with use of waste expansion for compression of a process stream 失效
标题翻译：高压空气分离过程使用废物膨胀来压缩工艺流
公开(公告)号：US06009723A
公开(公告)日：2000-01-04
申请号：US12093
申请日：1998-01-22
申请人： Zbigniew Tadeusz Fidkowski , Donn Michael Herron
发明人： Zbigniew Tadeusz Fidkowski , Donn Michael Herron
IPC分类号： F25J3/04
CPC分类号： F25J3/04103 , F25J3/04024 , F25J3/0403 , F25J3/04036 , F25J3/04054 , F25J3/0406 , F25J3/04066 , F25J3/0409 , F25J3/04115 , F25J3/04284 , F25J3/04309 , F25J3/04315 , F25J3/04351 , F25J3/04381 , F25J3/04393 , F25J3/04412 , F25J3/04581 , F25J2200/20 , F25J2215/40 , F25J2250/42 , F25J2250/52
摘要： The present invention relates to an elevated pressure air separation cryogenic process wherein feed air is compressed, treated to remove water and carbon dioxide, cooled to cryogenic temperature in a main heat exchanger having a cold end and a warm end and fed to a distillation column system having at least two (2) distillation columns for separation into at least a nitrogen-enriched product, an oxygen-enriched product and a gaseous waste stream characterized in that at least a portion of said waste stream is (isentropically) expanded to produce work and work produced by the expansion is used to provide at least a portion of the work required to compress a process stream other than the gaseous waste stream at a temperature warmer than the temperature of the cold end of said main heat exchanger. The alternative process streams to be compressed can be: at least a portion of the feed air, at least a portion of the oxygen-enriched product or at least a portion of the nitrogen-enriched product.
摘要翻译：本发明涉及一种高压空气分离低温方法，其中进料空气被压缩，处理以去除在具有冷端和热端的主热交换器中冷却至低温的水和二氧化碳，并进料至蒸馏塔系统具有至少两个用于分离成至少富氮产物的蒸馏塔，富氧产物和气态废物流，其特征在于，所述废物流的至少一部分（等熵）被扩展以产生作业和通过膨胀生产的工作用于提供在比所述主热交换器的冷端的温度更高的温度下压缩除气态废物流之外的工艺流所需的工作的至少一部分。待压缩的替代工艺流可以是：进料空气的至少一部分，富氧产物的至少一部分或富氮产物的至少一部分。

4. 发明授权

US6116051A Distillation process to separate mixtures containing three or more components 失效
标题翻译：蒸馏过程以分离含有三种或更多种组分的混合物
公开(公告)号：US6116051A
公开(公告)日：2000-09-12
申请号：US318150
申请日：1999-05-25
申请人： Rakesh Agrawal , Zbigniew Tadeusz Fidkowski
发明人： Rakesh Agrawal , Zbigniew Tadeusz Fidkowski
IPC分类号： B01D3/14 , F25J3/02 , F25J3/04 , F25J3/00
CPC分类号： B01D3/146 , F25J3/0209 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J3/0242 , F25J3/0247 , F25J3/0257 , F25J3/0261 , F25J3/0295 , F25J3/044 , F25J3/0466 , F25J3/04709 , F25J3/04793 , F25J2200/02 , F25J2200/30 , F25J2200/38 , F25J2200/50 , F25J2200/72 , F25J2210/12 , F25J2215/62 , F25J2215/64 , F25J2215/66 , F25J2290/40 , Y10S62/924 , Y10S62/927
摘要： A technique is set forth to reduce the heat requirement of conventional distillation processes which separate feed mixtures containing three or more components. The technique provides a great deal of flexibility in adjusting the temperatures of the required utilities including a scenario where the heat requirement is reduced without a need for additional higher temperature (and more costly) heat utility. In this technique, when a liquid bottoms stream (or gaseous overhead stream) containing two or more components is sent from an earlier column to a subsequent column, then a return vapor (or liquid) stream is implemented between the same locations in the two columns.
摘要翻译：提出了一种降低常规蒸馏方法的热需求的技术，其分离含有三种或更多种组分的进料混合物。该技术在调节所需实用程序的温度方面提供了极大的灵活性，包括减少热量需求的情况，而不需要额外的更高温度（更昂贵）的热效用。在这种技术中，当含有两个或更多个组分的液体底部物流（或气体塔顶物流）从较早的塔被输送到随后的塔时，则在两个塔的相同位置之间实现返回蒸气（或液体）流。

5. 发明授权

US5678425A Method and apparatus for producing liquid products from air in various proportions 失效
标题翻译：从空气中以不同比例生产液体产品的方法和装置
公开(公告)号：US5678425A
公开(公告)日：1997-10-21
申请号：US660311
申请日：1996-06-07
申请人： Rakesh Agrawal , Zbigniew Tadeusz Fidkowski , Shyam Ramchand Suchdeo
发明人： Rakesh Agrawal , Zbigniew Tadeusz Fidkowski , Shyam Ramchand Suchdeo
IPC分类号： F25J3/04
CPC分类号： F25J3/04812 , F25J3/0423 , F25J3/04296 , F25J3/04321 , F25J3/04345 , F25J3/04393 , F25J3/04412 , F25J3/04496 , F25J3/04957 , F25J2200/20 , F25J2200/54 , F25J2205/04 , F25J2215/42 , F25J2215/50 , F25J2230/24 , F25J2230/40 , F25J2240/60 , F25J2245/42 , F25J2245/50 , F25J2270/02 , F25J2290/10 , Y10S62/939 , Y10S62/94
摘要： A cryogenic method and apparatus using a liquefier and a two stage distillation column capable of operating in two modes, namely a first mode of operation during which only liquid nitrogen is produced and a second mode of operation during which liquid nitrogen and liquid oxygen are produced. By adjusting the time of operation in each mode, any ratio of liquid nitrogen to liquid oxygen greater than the ratio achieved during the second mode of operation can be achieved. In the first mode of operation, a condenser is used to condense the lower pressure stage gaseous nitrogen into lower pressure stage nitrogen condensate. To condense the lower pressure stage gaseous nitrogen, either at least a portion of the crude oxygen liquid from the higher pressure stage, at least a portion of the oxygen-enriched liquid from the lower pressure stage, at least a portion of the liquefied air, or mixtures thereof, are introduced to the condenser. In the second mode of operation, the top condenser is not used; instead, all of the crude oxygen liquid is introduced into the lower pressure stage, which produces a bottom liquid oxygen stream and a low pressure overhead waste stream containing nitrogen. The system includes fluid flow lines and valves for directing the flow of certain fluids, particularly the crude oxygen liquid and the oxygen-enriched liquid, during the two modes of operation.
摘要翻译：一种使用液化器和两级蒸馏塔的低温方法和装置，其能够以两种模式操作，即仅产生液氮的第一操作模式和产生液氮和液氧的第二操作模式。通过调整各模式下的操作时间，可以实现液氮比液氧的任何比例大于在第二操作模式下实现的比率。在第一种操作模式中，使用冷凝器将低压级气态氮冷凝成低压级氮气冷凝物。为了冷凝低压级气态氮，来自较高压级的至少一部分粗氧液体，来自低压级的富氧液体的至少一部分，液化空气的至少一部分，或其混合物引入冷凝器。在第二种操作模式下，不使用顶部冷凝器; 相反，所有的粗氧液体被引入低压级，产生底部液氧流和含有氮的低压塔顶废物流。该系统包括用于在两种操作模式期间引导某些流体，特别是粗氧液体和富氧液体的流动的流体流动管线和阀。

6. 发明授权

US06457327B1 Process for concentrating fluorine compounds 有权
标题翻译：浓缩氟化合物的方法
公开(公告)号：US06457327B1
公开(公告)日：2002-10-01
申请号：US09567164
申请日：2000-05-08
申请人： Zbigniew Tadeusz Fidkowski , John Frederick Cirucci , Rakesh Agrawal , Timothy Edward Conway
发明人： Zbigniew Tadeusz Fidkowski , John Frederick Cirucci , Rakesh Agrawal , Timothy Edward Conway
IPC分类号： F25J300
CPC分类号： C01B21/0832 , B01D53/002 , B01D53/1493 , B01D2257/2027 , B01D2257/2066 , Y02P20/154
摘要： The process removes from a diluted gas one or more fluorine compounds present at a first concentration in the diluted gas and concentrates the fluorine compounds. This is done by directly contacting the diluted gas with a cryogenic liquid having a temperature less than or equal to about −150° F., thereby producing a vapor lean in the fluorine compounds and liquid enriched with the fluorine compounds at a second concentration. The second concentration is greater than the first concentration.
摘要翻译：该过程从稀释气体中除去在稀释气体中以第一浓度存在的一种或多种氟化合物并浓缩氟化合物。这是通过将稀释气体与温度低于或等于约-150°F的低温液体直接接触来进行的，从而在氟化合物中产生蒸汽贫和富含氟化合物的液体以第二浓度。第二浓度大于第一浓度。

7. 发明授权

US06276168B1 Purification of nitrogen trifluoride by continuous cryogenic distillation 有权
标题翻译：通过连续低温蒸馏纯化三氟化氮
公开(公告)号：US06276168B1
公开(公告)日：2001-08-21
申请号：US09566075
申请日：2000-05-08
申请人： Zbigniew Tadeusz Fidkowski , John Frederick Cirucci , Rakesh Agrawal , Shyam Ramchand Suchdeo , Steven Ray Auvil
发明人： Zbigniew Tadeusz Fidkowski , John Frederick Cirucci , Rakesh Agrawal , Shyam Ramchand Suchdeo , Steven Ray Auvil
IPC分类号： F25J100
CPC分类号： C01B21/0832 , B01D3/146 , Y10S62/918
摘要： The process recovers NF3 from a multicomponent fluid containing NF3, one or more components less volatile than NF3, and one or more components more volatile than NF3. The process uses a first distillation column and a second distillation column, each distillation column having a top and a bottom. The process includes the following steps: feeding the multicomponent fluid to the first distillation column at a first feed location below the top of the first distillation column; feeding a cryogenic liquid to the first or second distillation column adjacent the top of the first or second distillation column; withdrawing a mixture containing NF3 from the first distillation column; feeding the mixture to the second distillation column at a second feed location; separating NF3 from the mixture in the second distillation column; and removing a stream of NF3 from the second distillation column.
摘要翻译：该过程从含有NF3的多组分流体，一种或多种不如NF3的挥发性成分的一种或多种成分以及比NF3更易挥发的一种或多种成分回收NF3。该方法使用第一蒸馏塔和第二蒸馏塔，每个蒸馏塔具有顶部和底部。该方法包括以下步骤：在第一蒸馏塔顶部的第一进料位置将多组分流体进料至第一蒸馏塔; 将第一或第二蒸馏塔的低温液体与邻近第一或第二蒸馏塔的顶部相加; 从第一蒸馏塔中取出含有NF 3的混合物; 在第二进料位置将混合物进料到第二蒸馏塔; 从第二蒸馏塔中的混合物中分离出NF3; 并从第二蒸馏塔中除去NF 3流。

8. 发明授权

US6106674A Operable and efficient distillation schemes for multicomponent separations 失效
标题翻译：多组分分离的可操作和有效的蒸馏方案
公开(公告)号：US6106674A
公开(公告)日：2000-08-22
申请号：US84722
申请日：1998-05-26
申请人： Rakesh Agrawal , Zbigniew Tadeusz Fidkowski
发明人： Rakesh Agrawal , Zbigniew Tadeusz Fidkowski
IPC分类号： F25J3/00 , B01D3/14 , B01D3/42 , F25J3/02 , F25J3/04 , B01D3/32
CPC分类号： B01D3/146 , F25J3/0219 , F25J3/0233 , F25J3/0257 , F25J3/0261 , F25J3/0295 , F25J3/044 , F25J3/0466 , F25J3/04793 , F25J2200/02 , F25J2200/30 , F25J2200/38 , F25J2200/50 , F25J2200/72 , F25J2210/12 , F25J2290/40 , Y10S203/20
摘要： The present invention teaches an efficient and easier to operate distillation system to separate mixtures containing three or more components into streams enriched in one of the components. In this invention, a liquid stream enriched in the least volatile component is withdrawn from the bottom of one distillation column while a vapor stream enriched in the most volatile component is withdrawn from the top of another distillation column. Of these two distillation columns, the pressure of the distillation column with the bottom liquid enriched in the least volatile component is higher; and this higher pressure distillation column transfers at least two vapor streams from different locations to either one or more other distillation columns within the distillation system. For a ternary mixture, both the vapor streams are transferred to the distillation column with the top vapor enriched in the most volatile component. In the preferred mode, at least one of the vapor transfer is part of a two-way communication between the two columns, i.e., in addition to the transfer of the vapor stream, a return liquid stream is implemented between the same locations of the two columns. This invention allows the flow of all vapor streams from a higher pressure column to a lower pressure column and thereby does not suffer with the operating pressure constraints of the prior art efficient processes.
摘要翻译：本发明教导了一种有效且易于操作的蒸馏系统，以将含有三种或更多种组分的混合物分离成富含一种组分的物流。在本发明中，从一个蒸馏塔的底部排出富含最少挥发性组分的液体物流，同时富含最易挥发组分的蒸气流从另一个蒸馏塔的顶部排出。在这两个蒸馏塔中，富含最不易挥发组分的底部液体的蒸馏塔的压力较高; 并且该高压蒸馏塔将至少两个蒸汽流从不同位置转移到蒸馏系统内的一个或多个其它蒸馏塔。对于三元混合物，蒸气流被转移到蒸馏塔中，顶部蒸气富含最易挥发的组分。在优选的模式中，至少一个蒸汽传递是两列之间的双向连通的一部分，即，除了蒸汽流的转移之外，在两个相同的位置之间实现返回液体流列。本发明允许从更高压力塔到低压塔的所有蒸汽流的流动，从而不受现有技术有效过程的操作压力限制的影响。

9. 发明授权

US6164089A Method and apparatus for recovering xenon or a mixture of krypton and xenon from air 有权
标题翻译：用于从空气中回收氙或氪和氙的混合物的方法和装置
公开(公告)号：US6164089A
公开(公告)日：2000-12-26
申请号：US349895
申请日：1999-07-08
申请人： William Paul Sweeny , Zbigniew Tadeusz Fidkowski
发明人： William Paul Sweeny , Zbigniew Tadeusz Fidkowski
IPC分类号： F25J3/04 , F25J1/00
CPC分类号： F25J3/04412 , F25J3/04745 , F25J2200/34 , F25J2200/92 , F25J2205/60 , Y10S62/925
摘要： Method and apparatus for recovering xenon or a mixture of xenon and krypton from air processed in a cryogenic air separation plant. An oxygen rich stream containing xenon and or krypton and xenon together with other trace impurities is subjected to a carbon dioxide and nitrous oxide removal step followed by concentration of xenon and or a mixture of krypton and xenon in a liquid fraction separated from an oxygen enriched vapor and vaporizing and recovering a xenon and or krypton and xenon mixture enriched vapor.
摘要翻译：用于从在低温空气分离装置中处理的空气中回收氙或氙和氪的混合物的方法和装置。将含有氙和/或氪和氙以及其他微量杂质的富氧物流进行二氧化碳和一氧化二氮去除步骤，然后将氙和/或氪和氙的混合物浓缩在与富氧蒸气分离的液体馏分中并蒸发并回收氙和/或氪和氙混合物富集蒸汽。

10. 发明授权

US5682763A Ultra high purity oxygen distillation unit integrated with ultra high purity nitrogen purifier 失效
标题翻译：超高纯氧蒸馏装置与超高纯度氮气净化器相结合
公开(公告)号：US5682763A
公开(公告)日：1997-11-04
申请号：US738989
申请日：1996-10-25
申请人： Rakesh Agrawal , Zbigniew Tadeusz Fidkowski , Lawrence Walter Pruneski
发明人： Rakesh Agrawal , Zbigniew Tadeusz Fidkowski , Lawrence Walter Pruneski
IPC分类号： F25J3/02 , F25J3/08 , F25J1/00
CPC分类号： F25J3/08 , F25J2200/02 , F25J2200/30 , F25J2200/50 , F25J2210/42 , F25J2210/50 , F25J2215/44 , F25J2215/56 , F25J2270/42 , F25J2270/904 , Y10S62/913
摘要： A method for producing ultra high purity liquid oxygen from standard grade liquid oxygen which integrates the oxygen purification process with a nitrogen purification process by utilizing the condensing duty of liquid nitrogen, thereby causing the nitrogen to vaporize which is desirable prior to delivery to a nitrogen purification unit. The method of the present invention includes pressurizing a source of liquid nitrogen and vaporizing at least a portion of the pressurized liquid nitrogen. The resulting high pressure gaseous nitrogen stream is introduced to at least one bottom reboiler/condenser of a high purity liquid oxygen unit, which also purifies standard grade liquid oxygen into ultra high purity liquid oxygen. The gaseous nitrogen provides the needed heat to the distillation columns of the high purity liquid oxygen unit. The condensed nitrogen is subsequently delivered to at least one top reboiler/condenser of the high purity liquid oxygen unit to provide refrigeration to the unit, and at the same time forming gaseous nitrogen which is then introduced to a nitrogen purification unit. The following streams are withdrawn from the unit: (a) ultra high purity liquid oxygen; (b) an argon-enriched waste stream; (c) a hydrocarbon-enriched waste stream. The oxygen purification portion of the method of the present invention can be accomplished on a portable skid, which includes primarily tanks, distillation columns, and heat exchangers, but no pumps or compressors.
摘要翻译：一种从标准级液氧生产超高纯度液氧的方法，其通过利用液氮的冷凝负荷将氧气净化过程与氮气净化过程相结合，从而使氮气蒸发，这在氮气净化之前是理想的单元。本发明的方法包括加压液氮源并蒸发至少一部分加压液氮。将所得的高压气态氮气流引入到高纯度液氧单元的至少一个底部再沸器/冷凝器，其也将标准级液氧气纯化成超高纯度液氧。气态氮为高纯度液氧单元的蒸馏塔提供所需的热量。随后将冷凝的氮气输送到高纯度液氧单元的至少一个顶部再沸器/冷凝器，以向该单元提供制冷，同时形成氮气，然后将其导入氮气净化单元。从单元中取出以下物流：（a）超高纯度液氧; （b）富氩废物流; （c）富含烃的废物流。本发明方法的氧气净化部分可以在便携式防滑装置上实现，其主要包括罐，蒸馏塔和热交换器，但不包括泵或压缩机。

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