公开(公告)号：US06432171B1

公开(公告)日：2002-08-13

申请号：US09648984

申请日：2000-08-28

申请人： Ravi Kumar ,  Madhusudhan Huggahalli ,  Martin Bülow

发明人： Ravi Kumar ,  Madhusudhan Huggahalli ,  Martin Bülow

IPC分类号： B01D5304

CPC分类号： B01D53/02 ,  B01D53/0462 ,  B01D2253/106 ,  B01D2253/108 ,  B01D2257/404 ,  B01D2257/504 ,  B01D2257/702 ,  B01D2257/80 ,  B01D2259/4146 ,  B01D2259/416 ,  Y02C10/08 ,  Y10S95/902

摘要： The present invention provides for a thermal swing adsorption process for the removal of trace impurities such as oxides of nitrogen and hydrocarbons from air prior to its separation by cryogenic distillation. The process may utilize three adsorbent layers, the first primarily removes water; the second primarily removes carbon dioxide; and the third layer is a composite adsorbent layer which removes the oxides of nitrogen and hydrocarbons from the air stream. Another embodiment employs a two layer adsorbent system to remove the impurities. Additionally, a single layer of composite adsorbent may be used to remove water, carbon dioxide, oxides of nitrogen, and hydrocarbons from the air stream.

摘要翻译： 本发明提供一种用于在通过低温蒸馏分离之前从空气中除去微量杂质如氮氧化物和烃的热变形吸附方法。 该方法可以使用三个吸附剂层，第一个主要是去除水; 第二个主要是去除二氧化碳; 并且第三层是从空气流中除去氮和碳氢化合物的复合吸附剂层。 另一个实施方案采用双层吸附剂系统来除去杂质。 此外，单层复合吸附剂可用于从空气流中除去水，二氧化碳，氮氧化物和碳氢化合物。

公开(公告)号：US06358302B1

公开(公告)日：2002-03-19

申请号：US09442840

申请日：1999-11-18

申请人： Shuguang Deng ,  Ravi Kumar ,  Rudolph J. Wolf ,  Mark J. Andrecovich

发明人： Shuguang Deng ,  Ravi Kumar ,  Rudolph J. Wolf ,  Mark J. Andrecovich

IPC分类号： B01D53047

CPC分类号： B01D53/02 ,  B01D53/0462 ,  B01D53/047 ,  B01D2253/104 ,  B01D2253/106 ,  B01D2253/108 ,  B01D2256/22 ,  B01D2257/404 ,  B01D2257/702 ,  B01D2257/80 ,  B01D2259/4143 ,  Y02C10/08 ,  Y02C20/10 ,  Y10S95/902

摘要： The present invention provides for a multi-composite adsorbent mixture which will remove H2O, CO2 and nitrogen oxides and/or hydrocarbons from a feed gas stream. The improvement lies in the use of a third adsorbent which is selective for nitrogen oxides, hydrocarbons or both.

摘要翻译： 本发明提供了一种多元复合吸附剂混合物，其将从进料气流中除去H 2 O，CO 2和氮氧化物和/或烃。 改进在于使用对氮氧化物，碳氢化合物或二者都是选择性的第三吸附剂。

公开(公告)号：US06238460B1

公开(公告)日：2001-05-29

申请号：US09277306

申请日：1999-03-26

申请人： Shuguang Deng ,  Ravi Kumar ,  Martin Bülow ,  Frank R. Fitch ,  Adeola Florence Ojo ,  Craig S. Gittleman

发明人： Shuguang Deng ,  Ravi Kumar ,  Martin Bülow ,  Frank R. Fitch ,  Adeola Florence Ojo ,  Craig S. Gittleman

IPC分类号： B01D53049

CPC分类号： B01D53/02 ,  B01D53/047 ,  B01D53/261 ,  B01D2253/104 ,  B01D2253/108 ,  B01D2253/1085 ,  B01D2256/22 ,  B01D2259/40052 ,  B01D2259/416 ,  Y02C10/08

摘要： Substantially all of the carbon dioxide is removed from a gas containing up to about 1% by volume carbon dioxide by subjecting the gas to a pressure swing adsorption process using a two layer adsorption system, wherein the first layer contains activated alumina and the second layer is a zeolite or a combination of zeolites having a silicon to aluminum atomic ratio of at least 1.5. The process is particularly suitable for removing substantially all carbon dioxide and water vapor contained in air prior to subjecting the air to cryogenic distillation.

摘要翻译： 通过使用双层吸附系统对气体进行变压吸附过程，基本上所有的二氧化碳从含有高达约1体积％二氧化碳的气体中除去，其中第一层含有活性氧化铝，第二层为 硅铝原子比至少为1.5的沸石或沸石的组合。 该方法特别适用于在空气进行低温蒸馏之前基本上除去空气中所含的二氧化碳和水蒸气。

公开(公告)号：US5980857A

公开(公告)日：1999-11-09

申请号：US40575

申请日：1998-03-18

申请人： Akhilesh Kapoor ,  Yudong Chen ,  Simon Paul Davies ,  Ravi Kumar ,  Robert Michael Thorogood

发明人： Akhilesh Kapoor ,  Yudong Chen ,  Simon Paul Davies ,  Ravi Kumar ,  Robert Michael Thorogood

IPC分类号： B01D53/047 ,  C01B3/16 ,  C01B3/56 ,  C10K1/32 ,  C10K3/04 ,  C01B3/12

CPC分类号： C10K1/32 ,  B01D53/047 ,  C01B3/16 ,  C01B3/56 ,  C10K3/04 ,  B01D2253/102 ,  B01D2253/104 ,  B01D2253/106 ,  B01D2253/108 ,  B01D2253/25 ,  B01D2256/16 ,  B01D2256/22 ,  B01D2257/108 ,  B01D2257/502 ,  B01D2257/504 ,  B01D2257/7025 ,  B01D2257/80 ,  B01D2259/40001 ,  B01D2259/4003 ,  B01D2259/40037 ,  B01D2259/40041 ,  B01D2259/40052 ,  B01D2259/40056 ,  B01D2259/40067 ,  B01D2259/40071 ,  B01D2259/40079 ,  B01D2259/4146 ,  B01D53/0462 ,  B01D53/0476 ,  B01D53/261 ,  C01B2203/043 ,  C01B2203/047 ,  C01B2203/0475 ,  C01B2203/048 ,  Y02C10/08 ,  Y02C20/20 ,  Y02P20/152 ,  Y02P20/156

摘要： A process for producing hydrogen gas by reacting steam with a gas mixture containing carbon monoxide, carbon dioxide and hydrogen to produce a hydrogen-enriched product gas and subjecting the product gas to pressure swing adsorption to produce a high purity hydrogen product and a hydrogen-depleted waste gas is improved by drying, where necessary, part of the gas mixture and subjecting the dry gas mixture to pressure swing adsorption using a carbon monoxide-selective adsorbent to produce a high purity carbon monoxide product gas and a carbon monoxide-depleted waste gas. Where the gas mixture is produced by endothermic reaction, one or both of the hydrogen-depleted waste gas and the carbon monoxide-depleted waste gas can be used as fuel to supply heat for the endothermic reaction.

摘要翻译： 通过使蒸汽与含有一氧化碳，二氧化碳和氢气的气体混合物反应产生氢气产生氢气的方法，并使产物气体进行变压吸附以产生高纯度氢气产物和贫氢 通过在必要时干燥气体混合物并通过使用一氧化碳选择性吸附剂对干燥气体混合物进行变压吸附以产生高纯度一氧化碳产物气体和一氧化碳贫化废气来改善废气。 在通过吸热反应产生气体混合物的情况下，可以使用一种或两种贫氢废气和一氧化碳贫化废气作为燃料来供给吸热反应的热量。

公开(公告)号：US5560763A

公开(公告)日：1996-10-01

申请号：US450766

申请日：1995-05-24

申请人： Ravi Kumar

发明人： Ravi Kumar

IPC分类号： B01D53/04 ,  B01D53/047 ,  F25J3/02

CPC分类号： B01D53/047 ,  F25J3/04169 ,  F25J3/04775 ,  B01D2253/104 ,  B01D2253/304 ,  B01D2256/12 ,  B01D2257/102 ,  B01D2259/40003 ,  B01D2259/40056 ,  B01D2259/40064 ,  B01D2259/403 ,  F25J2205/64 ,  F25J2290/10

摘要： An air separation method in which a pre-purification unit is provided with three or more beds which are subjected to a pressure swing adsorption process. Each of the beds is subjected to feed, pressurization, purge and repressurization stages. The purge stages are conducted with a waste stream from the air separation unit and the duration of the purge stage is equal to the total time of the cycle divided by the number of beds.

摘要翻译： 一种空气分离方法，其中预净化单元设置有经受变压吸附过程的三个或更多个床。 每个床都进行进料，加压，吹扫和再加压阶段。 吹扫阶段用来自空气分离单元的废物流进行，并且净化阶段的持续时间等于循环的总时间除以床数。

公开(公告)号：US5202057A

公开(公告)日：1993-04-13

申请号：US876683

申请日：1992-04-28

申请人： David M. Nicholas ,  Joseph P. Bushinsky ,  Ravi Kumar ,  Wilbur C. Kratz

发明人： David M. Nicholas ,  Joseph P. Bushinsky ,  Ravi Kumar ,  Wilbur C. Kratz

IPC分类号： B01D53/047 ,  C01B3/02 ,  C01B21/04

CPC分类号： C01B21/0494 ,  C01B3/025 ,  B01D2253/108 ,  B01D2256/10 ,  B01D2256/16 ,  B01D2257/502 ,  B01D2257/504 ,  B01D2257/7025 ,  B01D2257/80 ,  B01D2259/40001 ,  B01D2259/40022 ,  B01D2259/4003 ,  B01D2259/40037 ,  B01D2259/40052 ,  B01D2259/40056 ,  B01D2259/40062 ,  B01D2259/40064 ,  B01D2259/40066 ,  B01D2259/40067 ,  B01D2259/40081 ,  B01D53/047 ,  B01D53/261 ,  C01B2210/0006 ,  C01B2210/0014 ,  C01B2210/0045 ,  C01B2210/0051 ,  C01B2210/0062 ,  Y02C10/08 ,  Y02C20/20 ,  Y02P20/152 ,  Y02P20/156

摘要： Nitrogen is economically recovered from the flue gas evolved in a hydrocarbon steam reforming furnace by hydrogenation of free oxygen therein and removal of carbon dioxide and other minor impurities from the flue gas by pressure swing adsorption with recovery of high purity nitrogen is unsorbed effluent. The process is utilized to highest advantage in the production of ammonia syngas wherein natural gas or other hydrocarbon feed is subjected to steam reforming in a fuel-fired furnace. The nitrogen obtained by purification of the flue gas is combined with the purified hydrogen separated from the reformate providing the syngas for conversion to ammonia. In a preferred embodiment, the steam reforming is carried out in two stages, the first stage being performed in a conventional fuel-fired steam reforming furnace to which a major portion of the fresh hydrocarbon feed is charged. The hot effluent from this first reforming stage is employed as the heating medium to support reforming of the remaining minor portion of the fresh feed by heat exchange therewith.

摘要翻译： 通过在其中通过氢化游离氧从烃蒸汽转化炉中放出的烟道气经济地回收氮气，通过回收高纯度氮气的变压吸附从烟道气中除去二氧化碳和其它微量杂质是未被吸收的流出物。 该方法用于生产氨合成气的最大优点，其中天然气或其它烃进料在燃料燃烧炉中进行蒸汽重整。 通过净化烟气获得的氮与从提供合成气转化为氨的重整产物分离的纯化氢合并。 在优选的实施方案中，蒸汽重整分两个阶段进行，第一阶段在传统的燃料蒸汽重整炉中进行，其中主要部分的新鲜碳氢化合物进料被加入。 采用来自该第一重整阶段的热流出物作为加热介质，以通过与其进行热交换来支持新鲜进料的剩余少量部分的重整。

公开(公告)号：US5073356A

公开(公告)日：1991-12-17

申请号：US586359

申请日：1990-09-20

申请人： David E. Guro ,  Ravi Kumar ,  David M. Nicholas ,  Gary S. Roth

发明人： David E. Guro ,  Ravi Kumar ,  David M. Nicholas ,  Gary S. Roth

IPC分类号： B01D53/04 ,  B01D53/22 ,  C01B3/50 ,  C01B3/56 ,  C01B32/40

CPC分类号： C01B31/18 ,  C01B3/501 ,  C01B3/56 ,  C01B2203/0405 ,  C01B2203/043 ,  C01B2203/0465 ,  C01B2203/047 ,  C01B2203/0475 ,  C01B2203/048 ,  Y02C10/08 ,  Y02P20/125

摘要： The present invention is an integrated process for the adsorptive recovery of a high purity carbon monoxide product from a gas mixture containing hydrogen, carbon monoxide, carbon dioxide, methane, and nitrogen, with the potential additional recovery of a hydrogen-rich stream and the recycle of the resulting gas mixture to a reformation reaction to produce the gas mixture with a more favorable carbon monoxide and hydrogen product slate. Separate carbon dioxide recovery can be performed. Hydrogen recovery can be either by adsorptive or by membrane technology. The process achieves high recoveries at reduced capital cost and at reduced product cost.

公开(公告)号：US4915711A

公开(公告)日：1990-04-10

申请号：US354182

申请日：1989-05-18

申请人： Ravi Kumar

发明人： Ravi Kumar

IPC分类号： B01D53/047

CPC分类号： B01D53/0476 ,  B01D2253/102 ,  B01D2253/104 ,  B01D2253/106 ,  B01D2253/108 ,  B01D2256/10 ,  B01D2256/12 ,  B01D2256/16 ,  B01D2256/22 ,  B01D2256/245 ,  B01D2257/102 ,  B01D2257/104 ,  B01D2257/108 ,  B01D2257/504 ,  B01D2257/7025 ,  B01D2259/4003 ,  B01D2259/40037 ,  B01D2259/40064 ,  B01D2259/40067 ,  B01D2259/40069 ,  B01D2259/402 ,  Y02C10/08 ,  Y02C20/20

摘要： An adsorptive separation process is set forth for recovery of two gas products in high recovery and high purity using adsorption, depressurization low pressure purge, evacuation and repressurization. Depressurization and purge effluents are recycled to feed and optionally pressure equalizations are performed after the adsorption and after the evacuation as well as a pressure equalization using the low pressure effluent.

摘要翻译： 提出了一种吸附分离方法，用于回收利用吸附，减压低压吹扫，排空和再加压的高回收率和高纯度的两种气体产物。 将减压和净化废气再循环到进料中，并且任选地在吸附之后和抽真空之后进行压力平衡以及使用低压流出物的压力平衡。

公开(公告)号：US4914218A

公开(公告)日：1990-04-03

申请号：US313580

申请日：1989-02-17

申请人： Ravi Kumar ,  Wilbur C. Kratz ,  David L. Rarig ,  David E. Guro ,  William P. Schmidt

发明人： Ravi Kumar ,  Wilbur C. Kratz ,  David L. Rarig ,  David E. Guro ,  William P. Schmidt

IPC分类号： B01D53/047

CPC分类号： B01D53/0476 ,  B01D2253/108 ,  B01D2256/16 ,  B01D2256/20 ,  B01D2256/22 ,  B01D2256/24 ,  B01D2257/102 ,  B01D2257/406 ,  B01D2257/502 ,  B01D2257/504 ,  B01D2257/7025 ,  B01D2259/40001 ,  B01D2259/40015 ,  B01D2259/40016 ,  B01D2259/4003 ,  B01D2259/40032 ,  B01D2259/40037 ,  B01D2259/40041 ,  B01D2259/40052 ,  B01D2259/40066 ,  B01D2259/40067 ,  B01D2259/40069 ,  B01D2259/40073 ,  B01D2259/40075 ,  B01D2259/404 ,  Y02C10/08 ,  Y02C20/20

摘要： An improved pressure swing adsorption process is disclosed for the recovery of two individual components from a multicomponent gas mixture. The process utilizes a first group of adsorbent beds selective for the secondary component product and a second group of beds selective for tertiary impurities in the mixture. The gas mixture is passed through the first and second beds in series and high purity primary component product is discharged from the second beds. The secondary component product is recovered by desorption from the first beds. Product recovery is improved by recycling depressurization gas from the first beds and by several novel pressure equalization steps. The process can be used to recover high-purity hydrogen and carbon dioxide from a gas mixture containing these components along with minor amounts of methane, carbon monoxide, and nitrogen.

公开(公告)号：US4770676A

公开(公告)日：1988-09-13

申请号：US92746

申请日：1987-09-03

申请人： Shivaji Sircar ,  Ravi Kumar ,  William R. Koch ,  John VanSloun

发明人： Shivaji Sircar ,  Ravi Kumar ,  William R. Koch ,  John VanSloun

IPC分类号： C10L3/10 ,  B01D53/04 ,  B01D53/047 ,  C07C7/12

CPC分类号： B01D53/0462 ,  B01D53/047 ,  C07C7/12 ,  B01D2256/22 ,  B01D2256/24 ,  B01D2258/05 ,  B01D2259/40003 ,  B01D2259/40064 ,  B01D2259/40079 ,  B01D2259/40081 ,  B01D2259/4009 ,  B01D2259/402 ,  B01D2259/403 ,  B01D2259/404 ,  Y02C10/08 ,  Y02E50/346 ,  Y02P20/152

摘要： High purity methane and carbon dioxide are recovered from landfill gas in an integrated multi-column adsorption system having a temperature swing adsorption section (TSA) for pretreatment of the crude landfill gas to remove trace impurities therefrom, the thus cleaned gas being fed to a pressure swing adsorption section (PSA) for bulk separation of CO.sub.2 from methane. Regeneration of the impurity-laden adsorbent bed of the TSA section is carried out using part of the CO.sub.2 product gas recovered from the PSA section which gas is heated to thermal regeneration temperature.

摘要翻译： 在具有用于预处理粗填埋气体以从其中除去痕量杂质的变温吸附段（TSA）的综合多塔吸附系统中，从填埋气体回收高纯度甲烷和二氧化碳，将这样清洁的气体供给到压力 挥发吸附段（PSA），用于从甲烷中大量分离二氧化碳。 使用从PSA部分回收的部分CO 2产物气体再次将TSA部分的杂质负载吸附床再次加热至热再生温度。