公开(公告)号：US5373699A

公开(公告)日：1994-12-20

申请号：US133292

申请日：1993-10-08

申请人： Sophie Gastinne ,  Francois Venet ,  Bao Ha ,  Naohiko Yamashita

发明人： Sophie Gastinne ,  Francois Venet ,  Bao Ha ,  Naohiko Yamashita

IPC分类号： F25J3/04 ,  F25J3/02

CPC分类号： F25J3/04393 ,  F25J3/0429 ,  F25J3/04296 ,  F25J3/04351 ,  F25J3/04357 ,  F25J3/044 ,  F25J3/0443 ,  F25J3/04509 ,  F25J2200/50 ,  F25J2200/52 ,  F25J2200/54 ,  F25J2215/44 ,  F25J2220/42 ,  F25J2245/40 ,  F25J2245/42 ,  Y10S62/901 ,  Y10S62/913 ,  Y10S62/939

摘要： An air separation process wherein a nitrogen enriched fraction is withdrawn from the distillation column, a portion of which is compressed and recycled through the lowest positioned reboiler in the column and directed to an upper portion of the column as reflux.

摘要翻译： 一种空气分离方法，其中富氮馏分从蒸馏塔中排出，其一部分被压缩并通过柱中最低定位的再沸器再循环并作为回流引导至塔的上部。

公开(公告)号：US6050106A

公开(公告)日：2000-04-18

申请号：US168611

申请日：1998-10-09

申请人： Takao Yamamoto ,  Naohiko Yamashita

发明人： Takao Yamamoto ,  Naohiko Yamashita

IPC分类号： F25J3/04 ,  F25J1/00

CPC分类号： F25J3/04284 ,  F25J3/04163 ,  F25J3/04169 ,  F25J3/04254 ,  F25J3/0443 ,  F25J3/0486 ,  F25J3/04872 ,  F25J2200/50 ,  F25J2200/94 ,  F25J2205/82 ,  F25J2210/42 ,  F25J2215/44 ,  F25J2215/56 ,  F25J2220/42 ,  F25J2220/50 ,  F25J2220/52 ,  F25J2245/02 ,  F25J2250/20 ,  F25J2250/40 ,  F25J2250/50

摘要： There is provided a unit capable of simultaneously producing nitrogen of ra high purity and oxygen of ultra high purity from air as a feed material. Feed air is introduced into to the bottom 15 of a first rectification column 6. Liquid nitrogen of ultra high purity is recovered from between the upper rectifying part 12 and middle rectifying part 13, and liquid air free of high boiling point components is recovered from between the middle rectifying part 13 and lower rectifying part 14. Oxygen-rich liquid air collected in the bottom 15 is reduced in pressure by an expansion valve 31, and then introduced into a nitrogen condenser 8 as a refrigerant. After a portion of said liquid air is reduced in pressure by an expansion valve 33, it is introduced into the second rectification column 7, where low boiling point components are separated from the top part 21 and liquid oxygen of ultra high purity is recovered from the bottom 23. The remaining portion of said liquid air is reduced in pressure by an expansion valve 32, and then introduced into the nitrogen condenser as a part of the refrigerant. Accordingly, the quantity of a reflux liquid flowing through the lower rectifying part 14 is regulated, and the quantity of said liquid air introduced into the second rectification column 7 is regulated.

摘要翻译： 提供了能够从作为原料的空气同时生产超高纯度氮和超高纯氧的单元。 进料空气被引入到第一精馏塔6的底部15中。从上部精馏部分12和中间精馏部分13之间回收超高纯度的液氮，从中间精馏部分13回收不含高沸点组分的液体空气 中间整流部13和下部整流部14.通过膨胀阀31将在底部15中收集的富氧液体空气减压，然后作为制冷剂导入氮气冷凝器8。 在一部分所述液体空气通过膨胀阀33减压之后，将其引入到第二精馏塔7中，其中低沸点组分与顶部21分离，并从其中回收超高纯度的液氧 所述液体空气的剩余部分通过膨胀阀32减压，然后作为制冷剂的一部分引入氮冷凝器。 因此，流过下整流部14的回流液的量被调节，并且调节引入第二精馏塔7的所述液体空气的量。

公开(公告)号：US5325674A

公开(公告)日：1994-07-05

申请号：US843940

申请日：1992-02-18

申请人： Sophie Gastinne ,  Francois Venet ,  Bao Ha ,  Naohiko Yamashita

发明人： Sophie Gastinne ,  Francois Venet ,  Bao Ha ,  Naohiko Yamashita

IPC分类号： F25J3/04 ,  F25J3/00

CPC分类号： F25J3/04393 ,  F25J3/0429 ,  F25J3/04296 ,  F25J3/04351 ,  F25J3/04357 ,  F25J3/044 ,  F25J3/0443 ,  F25J3/04509 ,  F25J2200/50 ,  F25J2200/52 ,  F25J2200/54 ,  F25J2215/44 ,  F25J2220/42 ,  F25J2245/40 ,  F25J2245/42 ,  Y10S62/901 ,  Y10S62/913 ,  Y10S62/939

摘要： A process for producing gaseous nitrogen from a mixture to be treated in a distillation column, said mixture comprising nitrogen and oxygen, said process comprising the steps of:a) compressing the mixture to be treated to a pressure at least equal to the column pressure;b) cooling the compressed gas mixture and subjecting at least a first portion of said cooled mixture to expansion through a turbine to produce the required refrigeration and thereafter fractionated distillation in the column to obtain at the bottom of the column, an oxygen-enriched fraction and, at the top of the column, a nitrogen-enriched fraction,c) drawing off at least a portion of the nitrogen-enriched fraction as nitrogen product;d) compressing the remaining portion of the nitrogen-enriched fraction;e) recycling at least a portion of the compressed remaining portion of the nitrogen-enriched fraction to the bottom reboiler of the column where it condenses to provide reboil for the column;f) introducing at least a portion of the condensed nitrogen stream of step e) to the top of the column as additional reflux; andg) drawing off an oxygen-enriched fraction in liquid form from the bottom of the column and expanding at least a portion of said fraction to a pressure less than the column pressure and vaporizing this portion by heat exchange with the condensing nitrogen-enriched fraction at the top of the column.

摘要翻译： 一种从蒸馏塔中待处理混合物生产气态氮的方法，所述混合物包括氮气和氧气，所述方法包括以下步骤：a）将待处理的混合物压缩至至少等于柱压力的压力; b）冷却压缩气体混合物并使所述冷却的混合物的至少第一部分通过涡轮膨胀以产生所需的制冷，然后在塔中分馏蒸馏以在塔的底部获得富氧馏分和 在柱的顶部，富氮馏分，c）抽出至少一部分富氮馏分作为氮产物; d）压缩剩余部分的富氮馏分; e）将富氮馏分的压缩剩余部分的至少一部分再循环到塔的底部再沸器中，在其中冷凝以提供塔的再沸腾; f）将步骤e）的至少一部分冷凝的氮气流作为附加回流引入塔顶; 并且g）从塔的底部抽出液态的富氧级分，并将至少一部分所述级分膨胀至小于柱压的压力，并通过与冷凝富氮级分的热交换来汽化该部分 在列的顶部。

公开(公告)号：US5220798A

公开(公告)日：1993-06-22

申请号：US959540

申请日：1992-10-13

申请人： Takashi Nagamura ,  Naohiko Yamashita

发明人： Takashi Nagamura ,  Naohiko Yamashita

IPC分类号： F25J3/04

CPC分类号： F25J3/04224 ,  F25J3/0406 ,  F25J3/04266 ,  F25J3/04351 ,  F25J3/04412 ,  F25J2280/02 ,  Y10S62/912

摘要： The invention concerns the separation of air with an external cold source. An internal cold source is provided to supply cold heat to a compressed inert gas by expansion of a part of a liquefied inert gas when the cold from the external cold source proves to be insufficient. This part of the liquefied inert gas is combined with recycling and compressed gases. The desired production of liquid oxygen and nitrogen is thus assured in spite of variations in the external cold source.

摘要翻译： 本发明涉及用外部冷源分离空气。 提供内部冷源，当来自外部冷源的冷却被证实不足时，通过膨胀一部分液化惰性气体来向压缩的惰性气体供应冷热。 这部分液化惰性气体与再循环和压缩气体相结合。 因此，尽管外部冷源的变化，仍然确保所需的液氧和氮的产生。

公开(公告)号：US06387157B1

公开(公告)日：2002-05-14

申请号：US09619642

申请日：2000-07-19

申请人： Naohiko Yamashita

发明人： Naohiko Yamashita

IPC分类号： B01D5322

CPC分类号： B01D53/226 ,  C01B3/025 ,  C01B3/501 ,  C01B2203/0405 ,  C01B2203/0465 ,  C01B2203/047 ,  C01B2203/048 ,  C01C1/0482 ,  G05D11/035 ,  Y02P20/52

摘要： A mixed gas concentration regulating method and a concentration regulating apparatus, in which the maintenance of the recovery of an easily permeable gas and the restraint of the power expense are compatible. The mixed gas concentration regulating apparatus which includes a pressure raising line having boosters for raising the pressure of a mixed gas having two or more gases different in permeability, a line for leading out a part of the mixed gas from the pressure raising line, a gas separation section for separating the gas fed from the line to a permeate gas and a retentate gas by gas separation membranes, and a line for introducing the permeate gas into the pressure raising line, wherein the gas separation section includes plural stages the respective stages being connected with each other by a line for feeding a retentate gas of the preceding stage to a gas separation section of the succeeding stage and lines are provided for introducing permeate gases of the respective stages into the pressure raising line separately or after they are joined, and the pressure difference of the pressure raising line is utilized so that the pressure ratio on the feed side and permeation side is made larger as in the gas separation section of the latter stage side.

摘要翻译： 混合气体浓度调节方法和浓度调节装置，其中容易渗透气体的回收的维持和电力消耗的限制是兼容的。 该混合气体浓度调节装置包括具有用于提高具有两种或更多种渗透性不同的气体的混合气体的压力的增压器的升压管线，用于从加压线引出一部分混合气体的管线，气体 分离部分，用于将从管线供给的气体分离成通过气体分离膜的渗透气体和滞留气体;以及用于将渗透气体引入增压管线的管线，其中，气体分离部分包括多个阶段，各个阶段被连接 通过用于将前一级的滞留气体供给到后级的气体分离部分的管线，并且设置用于将各级的渗透气体单独地或在它们接合之后分别引入加压管线中的管线，并且 利用升压线的压力差使得进料侧和渗透侧的压力比变短 如在后一侧的气体分离部分中。

公开(公告)号：US06197090B1

公开(公告)日：2001-03-06

申请号：US09356709

申请日：1999-07-20

申请人： Naohiko Yamashita ,  Takao Yamamoto

发明人： Naohiko Yamashita ,  Takao Yamamoto

IPC分类号： B01D5322

CPC分类号： C01B3/501 ,  B01D53/22 ,  C01B23/0042 ,  C01B2203/0405 ,  C01B2203/0465 ,  C01B2210/0046

摘要： An object of the present invention is to provide a method for recovering a gas using a semipermeable membrane in an apparatus having a simple structure. The method is capable of maintaining a purity of a product gas at a constant value even if a feed amount of a feed stream is fluctuated. A feed stream G1 is a gas mixture of a fast gas having a relatively high permeability to a membrane 1 and a slow gas having a relatively low permeability to the membrane 1. The feed stream G1 is pressurized by a compressor 3 and fed to a membrane 1 separation unit 2 having the membrane 1. Part G7 of the permeate stream on the permeate side of the membrane 1 is recirculated to the upstream side of the compressor 3 through the first recirculation line 17 and merged into a stream of the feed stream G1. Simultaneously, another part of the permeate stream G2 on the permeate side of the membrane 1 is recovered through a product gas recovering line 5. In this manner, a product gas G3 having a fast gas increased in concentration is obtained.

摘要翻译： 本发明的目的是提供一种在具有简单结构的装置中使用半透膜回收气体的方法。 即使进料流的进料量波动，该方法能够将产物气体的纯度保持在恒定值。 进料流G1是对膜1具有较高渗透性的快速气体和对膜1具有相对低的渗​​透性的缓慢气体的气体混合物。进料流G1由压缩机3加压并进料到膜 1分离单元2.膜1的渗透侧的渗透物流的部分G7通过第一再循环管线17再循环到压缩机3的上游侧，并且合并成进料流G1。 同时，通过产物气体回收管线5回收膜1的渗透侧的渗透物流G2的另一部分。以这种方式，获得浓度增加的快速气体的产物气体G3。

公开(公告)号：US6123909A

公开(公告)日：2000-09-26

申请号：US297632

申请日：1999-05-04

申请人： Takao Yamamoto ,  Naohiko Yamashita

发明人： Takao Yamamoto ,  Naohiko Yamashita

IPC分类号： B01D53/04 ,  B01D53/047 ,  C01B23/00 ,  F25J3/02 ,  B01D3/00

CPC分类号： F25J3/08 ,  C01B23/0094 ,  F25J3/0285 ,  B01D2253/104 ,  B01D2253/108 ,  B01D2256/18 ,  B01D2257/504 ,  B01D2257/80 ,  B01D2259/40001 ,  B01D2259/40052 ,  B01D2259/40056 ,  B01D53/04 ,  B01D53/0462 ,  B01D53/047 ,  B01D53/261 ,  C01B2210/0004 ,  C01B2210/0006 ,  C01B2210/0014 ,  F25J2200/02 ,  F25J2200/74 ,  F25J2205/40 ,  F25J2205/82 ,  F25J2210/04 ,  F25J2215/58 ,  F25J2245/58 ,  F25J2270/12 ,  F25J2290/42 ,  Y02C10/08 ,  Y02P20/152

摘要： A process for purifying argon to obtain a high-purity argon from argon gas containing at least nitrogen, carbon monoxide, oxygen, and methane, including a first step of adding air or oxygen to the argon gas in an amount sufficient to oxidize the contained carbon monoxide into carbon dioxide in the presence of a catalyst while maintaining a temperature sufficient to oxidize the contained carbon monoxide without substantially oxidizing the methane, a second step of adding hydrogen into the argon gas obtained in the first step and reacting the contained oxygen with the hydrogen into water in the presence of a catalyst, a third step of removing the carbon dioxide and the water from the argon gas obtained in the second step by use of an adsorbent, and a fourth step of cooling the argon gas obtained in the third step, introducing the argon thus cooled into a distillation column and performing distillation by use of a reflux containing argon as a main component to remove nitrogen, hydrogen, and methane, thereby recovering a high purity argon gas.

摘要翻译： PCT No.PCT / JP98 / 03977 Sec。 371日期1999年5月4日 102（e）日期1999年5月4日PCT提交1998年9月4日PCT公布。 出版物WO99 /​​ 11437 日期1999年3月11日一种用于纯化氩以从至少包含氮，一氧化碳，氧和甲烷的氩气中获得高纯度氩的方法，包括向氩气中加入足够量的空气或氧气的第一步骤 在催化剂的存在下将所含的一氧化碳氧化成二氧化碳，同时保持足以氧化所含的一氧化碳而没有基本上氧化甲烷的温度;第二步骤，在第一步骤中获得的氩气中加入氢气， 在催化剂存在下将氢气与氢气一起包含在水中;第三步骤，通过使用吸附剂从第二步骤获得的氩气中除去二氧化碳和水;第四步骤，冷却得到的氩气 在第三步骤中，将如此冷却的氩气引入蒸馏塔中并通过使用以氩气为主要成分的回流进行蒸馏除去硝基 沼气，氢气和甲烷，从而回收高纯氩气。