公开(公告)号：US5026406A

公开(公告)日：1991-06-25

申请号：US502490

申请日：1990-03-30

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 adsorptive, 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 purge effluent.

公开(公告)号：US4988490A

公开(公告)日：1991-01-29

申请号：US244429

申请日：1988-09-14

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 ,  B01D53/047 ,  C01B3/025 ,  B01D2253/104 ,  B01D2253/108 ,  B01D2256/10 ,  B01D2256/16 ,  B01D2257/502 ,  B01D2257/504 ,  B01D2257/80 ,  B01D2259/40015 ,  B01D2259/40022 ,  B01D2259/4003 ,  B01D2259/40037 ,  B01D2259/40052 ,  B01D2259/40062 ,  B01D2259/40066 ,  B01D2259/40075 ,  B01D2259/40081 ,  B01D2259/402 ,  B01D2259/403 ,  B01D2259/4062 ,  B01D53/261 ,  C01B2210/0006 ,  C01B2210/0014 ,  C01B2210/0045 ,  C01B2210/0051 ,  C01B2210/0062 ,  Y02C10/08 ,  Y02C20/20 ,  Y02P20/152

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 as 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，通过变压吸附除去来自废气的二氧化碳和其它微量杂质，并回收高纯度氮气作为未吸收的流出物。 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。 在一个优选的实施方案中，蒸汽重整分两个阶段进行，第一阶段在常规的燃料蒸汽重整炉中进行，其中主要部分新鲜的烃类进料被加入到其中。 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：US4892565A

公开(公告)日：1990-01-09

申请号：US285468

申请日：1988-12-16

申请人： William P. Schmidt ,  Ravi Kumar ,  Alan D. Abel

发明人： William P. Schmidt ,  Ravi Kumar ,  Alan D. Abel

IPC分类号： B01D53/04 ,  B01D53/047 ,  B01J20/18 ,  C01B21/04 ,  C01B32/40 ,  C01B32/50

CPC分类号： B01D53/0476 ,  B01D2253/102 ,  B01D2253/108 ,  B01D2257/102 ,  B01D2257/50 ,  B01D2259/40052 ,  B01D2259/40062 ,  B01D2259/40064 ,  B01D2259/403 ,  B01D2259/404 ,  Y02C10/08

摘要： A process is described for recovery of a more selectively adsorbed key component from a gas mixture containing the key component and one or more less selectively adsorbed secondary components using vacuum swing adsorption. The process minimizes capital costs by reducing or eliminating gas storage vessels and reduces power requirements by operating without a feed compressor or elevated pressure feed, whereby feed is induced at least in part by vacuum conditions achieved by pressure equalization between parallel adsorption beds. Alternatively, at least a minor amount of less selectively adsorbed secondary component roduct can be recovered.

公开(公告)号：US4477265A

公开(公告)日：1984-10-16

申请号：US405643

申请日：1982-08-05

申请人： Ravi Kumar ,  Shivaji Sircar ,  Thomas R. White ,  Eugene J. Greskovich

发明人： Ravi Kumar ,  Shivaji Sircar ,  Thomas R. White ,  Eugene J. Greskovich

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

CPC分类号： B01D53/0446 ,  B01D53/0476 ,  C01B23/00 ,  F25J3/04733 ,  B01D2253/102 ,  B01D2253/108 ,  B01D2256/18 ,  B01D2257/102 ,  B01D2257/104 ,  B01D2259/402 ,  B01D2259/41 ,  B01D2259/4145 ,  B01D2259/416 ,  F25J2205/60 ,  F25J2205/82

摘要： Argon is recovered from a gas stream comprising the same in admixture with oxygen and nitrogen, by a vacuum swing adsorption (VSA) process wherein the mixed gas is passed through an adsorbent bed having thermodynamic selectivity for adsorption of nitrogen and the unadsorbed portion then passed through a second adsorbent bed having kinetic selectivity for retaining oxygen. Both adsorbent beds are regenerated by vacuum desorption, applied to the first bed for a longer time period than that of the second bed. Further purification of the recovered argon may be carried out, if desired, by catalytic hydrogenation of residual oxygen therein. The mixed gas stream fed to the VSA unit may be that obtained from the crude argon column associated with a cryogenic air separation plant and the waste gas from the VSA unit may be recycled to the main column of the cryogenic air separation plant, thus enhancing argon recovery.

摘要翻译： 通过真空挥发吸附（VSA）方法从包含该氧气和氮气的气流中回收氩气，其中混合气体通过具有用于吸附氮的热力学选择性的吸附剂床，然后未吸附的部分通过 具有保持氧的动力学选择性的第二吸附床。 两种吸附剂床均通过真空解吸再生，与第二床相比施加到第一床上更长的时间段。 如果需要，可以通过对其中的残余氧的催化氢化来进行回收的氩的进一步纯化。 供给到VSA单元的混合气流可以是从与低温空气分离设备相关联的粗氩塔获得的，并且来自VSA单元的废气可以再循环到低温空气分离设备的主塔，从而增强氩 复苏。