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公开(公告)号：US4761167A
公开(公告)日：1988-08-02
申请号：US940823
申请日：1986-12-12
IPC分类号： B01D53/047 , C07C7/12 , F25J3/02 , F25J3/00
CPC分类号： F25J3/0257 , B01D53/047 , C07C7/12 , F25J3/0219 , F25J3/0233 , B01D2253/108 , B01D2256/10 , B01D2256/245 , B01D2257/504 , B01D2259/40001 , B01D2259/40015 , B01D2259/4003 , B01D2259/40037 , B01D2259/40052 , B01D2259/40062 , B01D2259/40064 , B01D2259/40069 , B01D2259/404 , B01D2259/4061 , B01D2259/416 , F25J2205/40 , F25J2205/60 , F25J2210/12 , F25J2220/64 , F25J2220/66 , Y02C10/08 , Y02C10/12 , Y02P20/152 , Y10S62/908 , Y10S62/927
摘要： High purity methane is recovered from a fuel gas stream containing the same in admixture with mainly nitrogen and carbon dioxide, by first removing the carbon dioxide by selective adsorption in a PSA system and separating the remaining nitrogen from the methane by cryogenic distillation, the rejected nitrogen being employed for purging the CO.sub.2 -laden adsorbent beds of the PSA system. Cyclic regeneration of the sorbent-laden bed may entail nitrogen purge with or without including a carbon dioxide rinse, or the nitrogen purge of the sorbent-laden bed may be used in combination with pressure let-down by gas withdrawal into one or more companion beds.
摘要翻译： 通过首先通过PSA系统中的选择性吸附除去二氧化碳，并通过低温蒸馏从甲烷中分离出剩余的氮，将高纯度的甲烷从含有它们的燃料气流中主要从氮和二氧化碳中混合回收， 被用于清洗PSA系统的载有二氧化碳的吸附剂床。 负载有吸附剂的床的循环再生可能需要或不包括二氧化碳漂洗进行氮气净化，或者可以将吸附剂负载床的氮气吹扫与通过气体抽吸到一个或多个伴随床中的压力降低结合使用 。
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2.发明授权Air separation process with waste recycle for nitrogen and oxygen production 失效用于氮气和氧气生产的废物循环的空气分离过程
公开(公告)号：US4869742A
公开(公告)日：1989-09-26
申请号：US254509
申请日：1988-10-06
IPC分类号： F25J3/04
CPC分类号： F25J3/0443 , F25J3/04193 , F25J3/042 , F25J3/04284 , F25J3/04296 , F25J3/04309 , F25J3/04333
摘要： The present invention is an improved process for the production of nitrogen and oxygen that uses a double distillation column arrangement. The improvement to the process is the recycling of at least a portion of the oxygen-enriched waste stream to the bottom of the high pressure column. As a result of this improvement, the process is capable of making a nitrogen product with high purity (e.g., 5 ppm oxygen product) at high pressures (e.g., 40 to 150 psia) while simultaneously producing high purity oxygen (e.g., 99.6% oxygen). Nitrogen is produced only from the high pressure column.
摘要翻译： 本发明是使用双蒸馏塔装置的氮和氧的生产方法。 该方法的改进是将至少一部分富氧废物流再循环到高压塔的底部。 作为这种改进的结果，该方法能够在高压（例如40至150psia）下制备具有高纯度（例如5ppm氧产物）的氮产物，同时产生高纯氧（例如，99.6％的氧 ）。 氮仅由高压塔产生。
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公开(公告)号：US4867773A
公开(公告)日：1989-09-19
申请号：US254527
申请日：1988-10-06
IPC分类号： F25J3/04
CPC分类号： F25J3/04284 , F25J3/04333 , F25J3/044
摘要： A process is set forth for recovery of nitrogen from a feed gas stream, containing nitrogen and oxygen, using a cryogenic separation wherein a recycle stream having an oxygen content above that of the feed gas stream is recycled separately and independent of the feed gas stream to the cryogenic separation zone without any intervening process step that would decrease the oxygen content of the recycle stream.
摘要翻译： 阐述了使用低温分离从含有氮和氧的进料气流中回收氮的方法，其中氧气含量高于进料气流的再循环料流分开回收，独立于进料气流， 低温分离区，没有任何中间处理步骤，这将降低循环流的氧含量。
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公开(公告)号：US4732596A
公开(公告)日：1988-03-22
申请号：US43564
申请日：1987-04-28
CPC分类号： F25J3/0261 , B01D53/047 , C01B3/506 , C01B3/56 , C01B31/18 , F25J3/0223 , F25J3/0252 , B01D2256/16 , B01D2256/20 , B01D2257/504 , B01D2257/80 , B01D2259/40001 , B01D2259/40041 , B01D2259/40056 , B01D2259/40075 , B01D2259/4062 , B01D2259/416 , B01D53/261 , C01B2203/046 , C01B2203/047 , C01B2203/0475 , C01B2203/048 , C01B2203/0485 , C01B2203/0495 , F25J2200/70 , F25J2205/04 , F25J2205/40 , F25J2205/60 , F25J2205/66 , F25J2210/04 , F25J2245/02 , F25J2270/04 , Y02C10/08 , Y02P20/152 , Y10S62/908 , Y10S62/92 , Y10S62/932
摘要： Hydrogen and carbon monoxide are each separately recovered in high yield from a multicomponent gas stream containing these compounds together with carbon dioxide and a zero to minor amount of one or more gaseous components from the group consisting of nitrogen, methane, water vapor and C.sub.2 -C.sub.6 hydrocarbons, by a process wherein the multicomponent gas stream, such as that obtained by steam methane reforming, is initially treated in a pressure swing adsorption unit to remove water and CO.sub.2, and the obtained effluent freed of CO.sub.2 and water is then further subjected to (1) cryogenic fractionation to condense CO and to (2) hydrogen purification by selective adsorption (in either order) to recover high purity carbon monoxide and essentially pure hydrogen. The CO.sub.2 -laden adsorbent is regenerated by purging with a H.sub.2 O and CO.sub.2 -free waste gas stream from the hydrogen purification adsorbent bed or from the cryogenic fractionation or from both of these.
摘要翻译： 氢和一氧化碳分别从含有这些化合物的多组分气流与二氧化碳和零至少量的一种或多种气态组分从氮气，甲烷，水蒸气和C1-C6 碳氢化合物，其中通过蒸汽甲烷重整获得的多组分气流最初在变压吸附单元中处理以除去水和CO 2，然后将得到的排出CO 2和水的流出物进一步经受（ 1）低温分馏以冷凝CO和（2）通过选择性吸附（以任一顺序）氢纯化以回收高纯度一氧化碳和基本上纯的氢。 通过用来自氢气净化吸附床或来自低温分馏或来自这两者的H 2 O和不含CO 2的废气流进行净化来再生含二氧化碳的吸附剂。
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公开(公告)号：US4836833A
公开(公告)日：1989-06-06
申请号：US157434
申请日：1988-02-17
IPC分类号： B01D53/047 , B01D53/22 , C01B3/50 , C01B3/56 , C01B32/40
CPC分类号： B01D53/0476 , B01D53/229 , C01B3/501 , C01B3/56 , C01B31/18 , B01D2253/102 , B01D2253/108 , B01D2253/116 , B01D2256/16 , B01D2256/20 , B01D2257/504 , B01D2257/7025 , B01D2259/40001 , B01D2259/40015 , B01D2259/4003 , B01D2259/40032 , B01D2259/40052 , B01D2259/40064 , B01D2259/40066 , B01D2259/40067 , B01D2259/403 , B01D2259/404 , B01D2259/4062 , C01B2203/0405 , C01B2203/043 , C01B2203/0465 , C01B2203/047 , C01B2203/0475 , C01B2203/048 , Y02C10/08 , Y02C10/10 , Y02C20/20 , Y02P20/152 , Y02P20/156
摘要： Separation and individual recovery of high purity hydrogen and carbon monoxide from a mixed gas stream containing these compounds in association with carbon dioxide and one or more minor components such as particularly methane, is achieved by pressure swing adsorption to remove contained carbon dioxide from the charged gas, and further treatment of the CO.sub.2 -freed gas product by a sequence of steps utilizing (a) pressure swing adsorption and (b) selective permeation through a series of semi-permeable membranes, which steps (a) and (b) are carried out in either order of sequence.
摘要翻译： 通过变压吸附法从含有这些化合物的混合气流与二氧化碳和一种或多种次要组分（例如甲烷）相结合，分离和单独回收高纯度氢和一氧化碳，以从带电气体中除去含二氧化碳 ，并通过一系列步骤进一步处理二氧化碳释放的气体产物，所述步骤利用（a）变压吸附和（b）通过一系列半渗透膜进行选择性渗透，步骤（a）和（b） 按序列顺序。
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6.发明授权Nitrogen generator with waste distillation and recycle of waste distillation overhead 失效氮气发生器与废蒸馏和废物蒸馏塔顶回收
公开(公告)号：US4848996A
公开(公告)日：1989-07-18
申请号：US254510
申请日：1988-10-06
IPC分类号： F25J3/04
CPC分类号： F25J3/04321 , F25J3/0443 , F25J3/04969 , F25J2210/04 , F25J2215/44 , F25J2230/40 , F25J2245/02
摘要： The present invention is an improvement to a standard nitrogen generator. The improvement is two-fold; first, the addition of one or more distillation stages above the reboiler, which stages effectively transform the reboiler/condenser into a partial low pressure column and allow further separation (rectification) of the nitrogen generator bottoms liquid into two streams. Second, the recycle of the overhead stream (at a composition close to that of air) from the top of the low pressure column to the main air compressor. Additionally, at least a portion of the oxygen-enriched stream that exits the low pressure column below the bottom tray is expanded to provide refrigeration for the cycle.
摘要翻译： 本发明是对标准氮气发生器的改进。 改善是双重的; 首先，在再沸器上方添加一个或多个蒸馏级，该阶段有效地将再沸器/冷凝器转化为部分低压塔，并允许氮气发生器底部液体进一步分离（精馏）成两股流。 第二，从低压塔的顶部到主空气压缩机的塔顶流（以接近空气的组成）的再循环。 另外，离开底部塔板下方的低压塔的至少一部分富氧流被扩张以为循环提供制冷。
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