公开(公告)号：US5232473A

公开(公告)日：1993-08-03

申请号：US879490

申请日：1992-05-07

申请人： Akhilesh Kapoor ,  Ramachandran Krishnamurthy ,  Hung H. Nguyen

发明人： Akhilesh Kapoor ,  Ramachandran Krishnamurthy ,  Hung H. Nguyen

IPC分类号： B01D53/047

CPC分类号： B01D53/047 ,  B01D2256/16 ,  B01D2256/24 ,  B01D2259/40003 ,  B01D2259/40075 ,  B01D2259/40079 ,  B01D2259/40081 ,  B01D2259/404

摘要： A strongly adsorbed gas is recovered from a multicomponent gas mixture comprised of the strongly adsorbed gas, a flammable gas component and oxygen by repeating as essential steps (a) cocurrently passing the gas mixture through a bed of adsorbent which preferentially adsorbs the strongly adsorbed gas, thereby producing a nonadsorbed gas product stream that is depleted in the strongly adsorbed gas, (b) terminating the flow of multicomponent gas mixture into the bed and depressurizing the bed by countercurrently withdrawing a strongly adsorbed gas-enriched product stream from the bed and (c) countercurrently repressurizing the bed with the multicomponent gas mixture.

摘要翻译： 通过重复作为必要步骤（a），将气体混合物并流通过优先吸附强吸附气体的吸附剂床，从由强吸附气体，易燃气体组分和氧气组成的多组分气体混合物中回收强吸附气体， 从而产生贫吸附气体的非吸附气体产物流，（b）将多组分气体混合物的流动终止于床中并通过从床上逆流取出强烈吸附的富含气体的产物流并使床减压， ）与多组分气体混合物逆流再加压床。

公开(公告)号：US5125934A

公开(公告)日：1992-06-30

申请号：US590256

申请日：1990-09-28

申请人： Ramachandran Krishnamurthy ,  Donald L. MacLean

发明人： Ramachandran Krishnamurthy ,  Donald L. MacLean

IPC分类号： B01D53/04 ,  B01D53/047 ,  C01B23/00 ,  F25J3/02 ,  F25J3/08

CPC分类号： F25J3/08 ,  B01D53/0476 ,  F25J3/0285 ,  B01D2253/102 ,  B01D2253/108 ,  B01D2253/116 ,  B01D2253/25 ,  B01D2256/18 ,  B01D2257/102 ,  B01D2257/104 ,  B01D2257/106 ,  B01D2257/502 ,  B01D2257/504 ,  B01D2259/40001 ,  B01D2259/4003 ,  B01D2259/40037 ,  B01D2259/40066 ,  B01D2259/404 ,  B01D2259/416 ,  F25J2200/02 ,  F25J2205/40 ,  F25J2205/60 ,  F25J2205/82 ,  F25J2215/58 ,  F25J2270/12 ,  F25J2270/14 ,  F25J2270/42 ,  Y02C10/08

摘要： The present invention is directed to a method for recovering argon from a feed mixture comprising argon, carbon monoxide, carbon dioxide, nitrogen, and hydrogen which comprises the steps of (a) purifying the feed mixture to remove contaminants, (b) compressing the purified feed mixture to a separation pressure, and (c) passing the compressed purified feed mixture through a pressure swing adsorption system to separate carbon monoxide, carbon dioxide, and all or most of the nitrogen from the mixture as adsorbed products and to produce an argon-rich fraction as a non-adsorbed product. The argon-rich fraction from step (c) may be further purified by passing the fraction to a cryogenic fractional distillation system to separate hydrogen and any remaining nitrogen from the fraction as a distillate product and to produce a pure argon product. In a second and third embodiment, the invention is directed to a method for recovering argon from a feed mixture comprising argon, carbon monoxide, carbon dioxide, nitrogen, and oxygen, wherein oxygen is removed from the argon-rich fraction exiting the pressure swing adsorption system in step (c) by passing the fraction to a second pressure swing adsorption system before or after further purification of the fraction in a cryogenic fractional distillation system.

摘要翻译： 本发明涉及从包含氩气，一氧化碳，二氧化碳，氮气和氢气的进料混合物中回收氩的方法，其包括以下步骤：（a）纯化进料混合物以除去污染物，（b）将纯化的 进料混合物至分离压力，和（c）将经压缩的纯化进料混合物通过变压吸附系统，以将一氧化碳，二氧化碳和来自混合物的全部或大部分氮气作为吸附产物分离，并产生氩气 - 富集部分作为未吸附产物。 通过将馏分通入低温分馏系统将馏分中的氢和任何剩余的氮分离成馏出物，并且产生纯氩产物，可以进一步纯化来自步骤（c）的富氩部分。 在第二和第三实施方案中，本发明涉及从包含氩气，一氧化碳，二氧化碳，氮气和氧气的进料混合物中回收氩气的方法，其中从离开变压吸附塔的富氩馏分中除去氧气 在步骤（c）中通过在低温分馏系统中进一步纯化馏分之前或之后将馏分通入第二变压吸附系统。

公开(公告)号：US5112590A

公开(公告)日：1992-05-12

申请号：US270927

申请日：1988-11-14

申请人： Ramachandran Krishnamurthy ,  Steven L. Lerner ,  Yagya Shukla ,  Alan G. Stokley

发明人： Ramachandran Krishnamurthy ,  Steven L. Lerner ,  Yagya Shukla ,  Alan G. Stokley

IPC分类号： B01D53/04 ,  B01D53/047 ,  C01B3/34 ,  C01B3/50 ,  C01B3/56 ,  C01B23/00 ,  C01B32/40

CPC分类号： C01B3/34 ,  B01D53/047 ,  C01B23/00 ,  C01B3/56 ,  C01B31/18 ,  B01D2253/102 ,  B01D2253/108 ,  B01D2256/16 ,  B01D2256/18 ,  B01D2256/20 ,  B01D2256/22 ,  B01D2256/245 ,  B01D2257/102 ,  B01D2257/11 ,  B01D2257/502 ,  B01D2257/504 ,  B01D2257/7025 ,  B01D2257/80 ,  B01D2259/40001 ,  B01D2259/40016 ,  B01D2259/4003 ,  B01D2259/40032 ,  B01D2259/40037 ,  B01D2259/40039 ,  B01D2259/40047 ,  B01D2259/40052 ,  B01D2259/40067 ,  B01D2259/40069 ,  B01D2259/40073 ,  B01D2259/403 ,  B01D2259/404 ,  B01D2259/4065 ,  B01D2259/4146 ,  B01D53/0476 ,  B01D53/261 ,  C01B2203/043 ,  C01B2203/0465 ,  C01B2203/047 ,  C01B2203/0475 ,  C01B2203/048 ,  C01B2203/0495 ,  Y02C10/08 ,  Y02C20/20 ,  Y02P20/152 ,  Y02P20/156

摘要： A process for separation of a gas mixture containing three components, e.g. a mixture comprising hydrogen, carbon monoxide and carbon dioxide produced by steam reforming a hydrocarbon, by pressure swing adsorption is disclosed. In one embodiment of the process, the gas mixture is sequentially passed through first and second adsorptive regions each of which adsorbs a second component more strongly than a first component but less strongly than a third component, a first fraction enriched in the first component is withdrawn from the downstream end of the second region, introduction of gas mixture to the first region is stopped and the second region is closed to the first region, a second fraction enriched in the second component is withdrawn first from the upstream end of the second adsorptive region while passing gas mixture enriched in the third component into the first region from its upstream end and then from the downstream end of the first region, and withdrawing a third fraction enriched in the third component from the upstream end of the first region. The separation process is also applicable to other gas mixtures such as a mixture of hydrogen, argon, methane and nitrogen commonly available as ammonia plant purge gas from which ammonia has been removed.

公开(公告)号：US5000925A

公开(公告)日：1991-03-19

申请号：US522343

申请日：1990-05-11

申请人： Ramachandran Krishnamurthy ,  Virginia A. Malik ,  Alan G. Stokley

发明人： Ramachandran Krishnamurthy ,  Virginia A. Malik ,  Alan G. Stokley

IPC分类号： B01D53/047 ,  C01B3/48 ,  C01B3/56 ,  C01B32/50 ,  F25J3/02

CPC分类号： F25J3/0223 ,  B01D53/0476 ,  C01B3/48 ,  C01B3/56 ,  C01B31/20 ,  F25J3/0266 ,  B01D2256/16 ,  B01D2256/22 ,  B01D2257/108 ,  B01D2257/502 ,  B01D2257/504 ,  B01D2259/40001 ,  B01D2259/40015 ,  B01D2259/40022 ,  B01D2259/40032 ,  B01D2259/40037 ,  B01D2259/40052 ,  B01D2259/40066 ,  B01D2259/40071 ,  B01D2259/402 ,  C01B2203/0233 ,  C01B2203/0283 ,  C01B2203/043 ,  C01B2203/0475 ,  C01B2203/0495 ,  C01B2203/0811 ,  C01B2203/0877 ,  C01B2203/1241 ,  C01B2203/146 ,  C01B2203/148 ,  C01B2203/1628 ,  C01B2203/80 ,  F25J2200/02 ,  F25J2200/72 ,  F25J2205/40 ,  F25J2205/60 ,  F25J2210/04 ,  F25J2215/04 ,  F25J2220/82 ,  F25J2230/30 ,  F25J2245/02 ,  F25J2270/90 ,  Y02C10/08 ,  Y02C10/12 ,  Y02P20/152

摘要： Highly purified gaseous hydrogen and liquid carbon dioxide are produced from a steam reformer/shift converter by passing the effluent from the latter through a multibed hydrogen PSA unit followed by an uncoupled carbon dioxide PSA unit. The carbon dioxide PSA unit produces a hydrogen-rich stream which is recycled to the feed to the steam reformer, a carbon dioxide-rich recycle stream which is recycled to the carbon dioxide PSA unit feed and a carbon dioxide-rich product stream which is introduced under pressure to a liquifier. A waste stream from the liquifier is recycled to the carbon dioxide PSA unit feed. A portion of the carbon dioxide-rich product stream is withdrawn from the compressor at a stage such that its pressure is higher than that of the carbon dioxide PSA unit and returned thereto as a cocurrent purge preceding bed regeneration to obtain product.

摘要翻译： 通过将来自后者的流出物通过多碱氢PSA单元，然后通过未偶联的二氧化碳PSA单元，由蒸汽重整器/变换转换器产生高度纯化的气态氢气和液体二氧化碳。 二氧化碳PSA单元产生富氢流，其被再循环到蒸汽重整器的进料中，富含二氧化碳的循环物流被再循环到二氧化碳PSA单元进料和富含二氧化碳的产物流 在压力下进入液化器。 来自液化器的废物流被再循环到二氧化碳PSA单元进料中。 一部分富含二氧化碳的产物流从压缩机中排出，使得其压力高于二氧化碳PSA单元的压力，并作为并流吹扫在床再生之前返回，以获得产物。

公开(公告)号：US09475696B2

公开(公告)日：2016-10-25

申请号：US14187663

申请日：2014-02-24

申请人： Rachid Mabrouk ,  Ramachandran Krishnamurthy

发明人： Rachid Mabrouk ,  Ramachandran Krishnamurthy

IPC分类号： C01B3/48 ,  C01C1/04 ,  C01B3/02 ,  C01B3/44

CPC分类号： C01B3/48 ,  C01B3/025 ,  C01B3/44 ,  C01B2203/0233 ,  C01B2203/0288 ,  C01B2203/043 ,  C01B2203/068 ,  C01B2203/1058 ,  C01B2203/1241 ,  C01C1/0405 ,  Y02P20/52

摘要： A method for producing synthesis gas and ammonia by forming a synthesis gas mixture; separating solids from the synthesis gas mixture; subjecting the synthesis gas mixture to a shift reaction and separating the reaction products by a pressure swing adsorption unit. The hydrogen and nitrogen separated in the pressure swing adsorption unit are fed to an ammonia reactor to produce ammonia.

摘要翻译： 一种通过形成合成气混合物生产合成气和氨的方法; 从合成气混合物中分离固体; 使合成气体混合物进行转化反应，并通过变压吸附单元分离反应产物。 在变压吸附单元中分离出的氢和氮被送入氨反应器以产生氨。

公开(公告)号：US20120085232A1

公开(公告)日：2012-04-12

申请号：US13084891

申请日：2011-04-12

申请人： Rustam H. Sethna ,  Ramachandran Krishnamurthy

发明人： Rustam H. Sethna ,  Ramachandran Krishnamurthy

IPC分类号： B01D53/047 ,  B01D53/26

CPC分类号： B01D53/0476 ,  B01D53/0462 ,  B01D53/047 ,  B01D53/226 ,  B01D53/229 ,  B01D53/261 ,  B01D2256/245 ,  B01D2257/102 ,  B01D2257/104 ,  B01D2257/504 ,  B01D2257/80 ,  B01D2259/40062 ,  B01D2259/40071 ,  B01D2259/404 ,  B01D2259/4145 ,  C10L3/101 ,  C10L3/104 ,  C10L3/105 ,  F25J3/0209 ,  F25J3/0233 ,  F25J3/0257 ,  F25J2200/02 ,  F25J2200/70 ,  F25J2205/40 ,  F25J2205/60 ,  F25J2205/80 ,  F25J2210/40 ,  F25J2210/66 ,  F25J2215/04 ,  F25J2220/66 ,  Y02C10/08 ,  Y02C10/10

摘要： A method for removing contaminants from natural gas streams. The natural gas stream is fed to a dryer, then a membrane module and a multibed, multilayer vacuum swing adsorption process for removal of oxygen, nitrogen and carbon dioxide from the natural gas stream. Alternatively when carbon dioxide is in relatively low concentration in the natural gas stream, the membrane module step is not employed.

摘要翻译： 一种从天然气流中去除污染物的方法。 将天然气流送入干燥器，然后进入膜组件和用于从天然气流中除去氧气，氮气和二氧化碳的多相多层真空变压吸附方法。 或者当二氧化碳在天然气流中浓度相对较低时，不使用膜组件步骤。

公开(公告)号：US20080305028A1

公开(公告)日：2008-12-11

申请号：US11974952

申请日：2007-10-17

申请人： Kevin McKeigue ,  Weibin Jiang ,  Ramachandran Krishnamurthy

发明人： Kevin McKeigue ,  Weibin Jiang ,  Ramachandran Krishnamurthy

IPC分类号： D01F9/12 ,  B01J8/00

CPC分类号： C01B3/503 ,  B82Y30/00 ,  B82Y40/00 ,  C01B3/38 ,  C01B3/382 ,  C01B3/50 ,  C01B32/162 ,  C01B2203/0233 ,  C01B2203/0238 ,  C01B2203/0244 ,  C01B2203/0255 ,  C01B2203/0261 ,  C01B2203/0405 ,  C01B2203/043 ,  C01B2203/046 ,  C01B2203/047 ,  C01B2203/0475 ,  C01B2203/06 ,  C01B2203/0822 ,  C01B2203/0827 ,  C01B2203/0883 ,  C01B2203/0894 ,  C01B2203/1058 ,  C01B2203/1064 ,  C01B2203/107 ,  C01B2203/1082 ,  C01B2203/1235 ,  C01B2203/1241 ,  C01B2203/1258 ,  C01B2203/1276 ,  C01B2203/1288 ,  C01B2203/142 ,  C01B2203/143 ,  C01B2203/146 ,  C01B2203/147 ,  C01B2203/148 ,  C01B2203/86 ,  Y02P20/125 ,  Y02P20/128 ,  Y02P30/30

摘要： The integrated processes of the dry reforming or partial oxidation upstream of the carbon nanotube-producing reactor are described allowing the carbon monoxide to be produced on an as-needed basis, negating the need to transport carbon monoxide to the production site or store large quantities of carbon monoxide on-site. The apparatuses allowing to carry out such integrated processes are also provided. Carbon dioxide emissions may be eliminated from the carbon nanotube production process. This may be achieved by recycling the carbon dioxide byproduct and mixing it with the feed to the partial oxidation process.

公开(公告)号：US06751986B2

公开(公告)日：2004-06-22

申请号：US10016469

申请日：2001-12-10

申请人： Nancy Christine Irwin ,  Ramachandran Krishnamurthy ,  Kevin McKeigue

发明人： Nancy Christine Irwin ,  Ramachandran Krishnamurthy ,  Kevin McKeigue

IPC分类号： F25J100

CPC分类号： F25J3/04909 ,  B01J19/32 ,  B01J2219/32206 ,  B01J2219/3221 ,  B01J2219/32213 ,  B01J2219/32227 ,  B01J2219/32237 ,  B01J2219/32244 ,  B01J2219/32255 ,  B01J2219/32258 ,  Y10S62/906 ,  Y10T428/24322 ,  Y10T428/24711

摘要： A structured packing element comprises a plurality of corrugated sheets and one planar member positioned adjacent to each of the corrugated sheets. The planar member has a top edge and a bottom edge that are at least proximally aligned with the top and bottom edges respectively of the corrugated sheets. The planar member is further characterized by a middle portion having an open area percent that is higher than the open area percents of the top and bottom portions of the planar member. The structured packing element can be used to form structured packings for distillation applications.

摘要翻译： 规整的填充元件包括多个波纹片和邻近每个波纹片定位的一个平面构件。 平面构件具有顶部边缘和底部边缘，其分别与波纹片材的顶部和底部边缘至少向近侧对准。 平面构件的特征还在于具有开口面积百分比高于平面构件的顶部和底部的开口面积百分比的中间部分。 结构化填充元件可用于形成用于蒸馏应用的结构填料。

公开(公告)号：US06280819B1

公开(公告)日：2001-08-28

申请号：US09344647

申请日：1999-06-25

申请人： Kevin McKeigue ,  Ramachandran Krishnamurthy ,  Hendrik Adriaan Kooijman

发明人： Kevin McKeigue ,  Ramachandran Krishnamurthy ,  Hendrik Adriaan Kooijman

IPC分类号： B32B310

CPC分类号： B01J19/32 ,  B01J2219/32206 ,  B01J2219/3221 ,  B01J2219/32213 ,  B01J2219/32217 ,  B01J2219/32227 ,  B01J2219/32237 ,  B01J2219/32244 ,  B01J2219/32258 ,  B01J2219/32408 ,  B01J2219/32425 ,  B01J2219/32483 ,  F25J3/04412 ,  F25J3/04678 ,  F25J3/04909 ,  Y10S261/72 ,  Y10T428/24322 ,  Y10T428/24711

摘要： The present invention provides a structured packing comprising a plurality of corrugated sheets and a plurality of flat, planar members alternating with and located between the sheets to inhibit turbulence in vapor ascending through the structured packing. The plurality of planar members are positioned so that at least lowermost transverse edges of the planar members and the corrugated sheets are situated at least proximal to one another as viewed when said structured packing is in use. Each of the planar members and the corrugated sheets has perforations sized to inhibit liquid and vapor flows but to allow pressure equalization. The planar members can be strip-like and positions at or near the top and bottom transverse edges of the corrugated sheets or can have the same length and width of the corrugated sheets. The size and number of perforations can be optimized for air separation applications.

摘要翻译： 本发明提供了一种包括多个波纹片和多个平坦的平面构件的规整填料，所述平坦的平面构件与片材之间交替并且位于片材之间，以阻止通过规整填料上升的蒸气中的湍流。 多个平面构件被定位成使得平面构件和波纹板的至少最下侧的横向边缘至少位于彼此之间，当所述规整填料使用时观察。 平面构件和波纹板中的每一个都具有穿孔尺寸，以防止液体和蒸汽流动，但允许压力平衡。 平面构件可以是带状的，并且位于波纹片的顶部和底部横向边缘处或附近，或者可以具有相同的波纹片的长度和宽度。 穿孔的尺寸和数量可以针对空气分离应用进行优化。

公开(公告)号：US6128922A

公开(公告)日：2000-10-10

申请号：US316820

申请日：1999-05-21

申请人： Mary Helen Dean ,  Richard W. Potthoff ,  Robert M. Thorogood ,  Ramachandran Krishnamurthy

发明人： Mary Helen Dean ,  Richard W. Potthoff ,  Robert M. Thorogood ,  Ramachandran Krishnamurthy

IPC分类号： F25J3/02 ,  B01D3/26 ,  B01J19/32 ,  F25J3/04 ,  F25J1/00

CPC分类号： F25J3/04672 ,  B01J19/32 ,  F25J3/04921 ,  B01J2219/3306 ,  B01J2219/3325 ,  Y10S62/906

摘要： A distillation method and column in which a gaseous mixture is introduced into a bottom region of a packed column having a plurality packed beds using structured packing. The gaseous mixture comprises higher and lower volatility components. The packed column is operated so that the higher and lower volatility components have a relative volatility within the column in a range of between 1.05 and 1.8. In order to alleviate the effect of liquid maldistribution in the lowermost bed of such a column, the lowermost bed is sized to be between about 50% and about 80% of the height of the next overlying bed, with 80% being preferred and the total height of the packing within the column is at least about six meters.

摘要翻译： 蒸馏方法和塔，其中使用规整填料将气态混合物引入具有多个填充床的填充塔的底部区域。 气体混合物包含较高和较低挥发性成分。 操作填充柱使得较高和较低挥发性组分在柱内的相对挥发度在1.05和1.8之间的范围内。 为了减轻液体在这种塔的最低床中的分布不均匀的影响，最下层的尺寸设定在下一个覆盖床的高度的约50％至约80％之间，其中80％是优选的， 柱内的包装高度至少约六米。