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    Cryogenic air separation unit with argon condenser vapor recycle
    1.
    发明授权
    Cryogenic air separation unit with argon condenser vapor recycle 有权

    公开(公告)号：US11933541B2

    公开(公告)日：2024-03-19

    申请号：US17399713

    申请日：2021-08-11

    申请人： Zhengrong Xu

    发明人： Zhengrong Xu

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04678 ,  F25J3/04412 ,  F25J2200/06 ,  F25J2200/72 ,  F25J2215/42 ,  F25J2215/50 ,  F25J2215/58 ,  F25J2245/58

    摘要： A system and method for producing two or more nitrogen product streams and a crude argon stream from a nitrogen and argon producing air separation unit is provided. The disclosed embodiments of the cryogenic-based nitrogen and argon producing air separation units and associated air separation cycles include the means for directing a first portion of a boil-off stream from an argon condenser of the air separation unit to a waste expansion refrigeration circuit and concurrently recycling a second portion of the boil-off stream from the argon condenser to the main air compression system of the air separation unit to be mixed or blended with the incoming feed air. Optionally, a third portion of the boil-off stream from the argon condenser may be further compressed in a cold compressor and returned to the lower pressure column.

    AIR SEPARATION APPARATUS
    2.
    发明公开
    AIR SEPARATION APPARATUS 审中-公开

    公开(公告)号：US20230280093A1

    公开(公告)日：2023-09-07

    申请号：US18118381

    申请日：2023-03-07

    申请人： L'Air Liquide, Societe Anonyme pour l'Etude et lExploitation des Procedes Georges Claude

    发明人： Maxime RANCHOUX ,  Shinji TOMITA

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04721 ,  F25J3/04412 ,  F25J3/04806 ,  F25J2210/40 ,  F25J2215/42 ,  F25J2215/58 ,  F25J2245/02

    摘要： An air separation apparatus comprises: a first rectification column, a first condensing portion, a second rectification column, a third rectification column, a second condensing portion, a fourth rectification column, a third condensing portion, and a recycling pipe for recycling a gas drawn from the third condensing portion to the second rectification column. The air separation apparatus furthermore comprises: a branch pipe branching from the recycling pipe; and a control unit for controlling opening/closing of a valve so that a gas drawn from the third condensing portion is fed to the branch pipe for a predetermined period from the start of driving of the third condensing portion, and for controlling opening/closing of the valve so that the gas drawn from the third condensing portion is fed to the recycling pipe after the predetermined period has elapsed.

    Process for recovery, purification, and recycle of argon
    5.
    发明授权
    Process for recovery, purification, and recycle of argon 失效
    回收，纯化和回收氩气的方法

    公开(公告)号：US07361316B2

    公开(公告)日：2008-04-22

    申请号：US10925096

    申请日：2004-08-24

    申请人： Madhukar Bhaskara Rao

    发明人： Madhukar Bhaskara Rao

    IPC分类号： B01D50/00 ,  F25J3/00 ,  F25J3/08

    CPC分类号： F25J3/08 ,  B01D53/002 ,  B01D53/864 ,  B01D53/8671 ,  F25J3/0285 ,  F25J2205/40 ,  F25J2205/82 ,  F25J2215/58 ,  Y10S62/924

    摘要： A system for the purification and recycle of impure argon is disclosed herein. The system of the present invention can produce very high purity argon, i.e., about 1 ppb or less of impurities. In one embodiment, a cryogenic separation apparatus is used to remove the nitrogen, hydrocarbon, and hydrogen impurities from the argon stream. A catalyst bed is then operated at ambient temperature to remove hydrogen, oxygen, and carbon monoxide impurities to provide the purified argon product.

    摘要翻译： 本文公开了用于净化和再循环不纯的氩的系统。 本发明的系统可以产生非常高纯度的氩，即约1ppb或更少的杂质。 在一个实施方案中，使用低温分离装置从氩气流中除去氮，烃和氢杂质。 然后在环境温度下操作催化剂床以除去氢气，氧气和一氧化碳杂质，以提供纯化的氩气产物。

    Method of purifying and recycling argon
    6.
    发明授权
    Method of purifying and recycling argon 有权
    氩气净化和回收方法

    公开(公告)号：US06685903B2

    公开(公告)日：2004-02-03

    申请号：US09725778

    申请日：2001-03-01

    申请人： Kenneth K. Wong ,  Dante Patrick Bonaquist

    发明人： Kenneth K. Wong ,  Dante Patrick Bonaquist

    IPC分类号： C01B2300

    CPC分类号： F25J3/0252 ,  B01D53/00 ,  B01D53/02 ,  B01D2251/202 ,  B01D2257/104 ,  B01D2257/2064 ,  B01D2257/2066 ,  C01B23/0094 ,  C01B2210/0006 ,  C01B2210/0014 ,  C01B2210/0045 ,  C01B2210/0046 ,  F25J3/0257 ,  F25J3/0285 ,  F25J3/08 ,  F25J2200/02 ,  F25J2200/04 ,  F25J2200/30 ,  F25J2200/50 ,  F25J2200/74 ,  F25J2205/60 ,  F25J2205/82 ,  F25J2215/04 ,  F25J2215/50 ,  F25J2215/58 ,  F25J2245/58 ,  F25J2270/12 ,  F25J2270/42 ,  F25J2290/62 ,  Y02C10/08 ,  Y02C10/12 ,  Y02P20/152 ,  Y02P20/154 ,  Y10S62/924

    摘要： This invention is directed to a method for purifying argon from an impure argon stream. If the oxygen concentration in the impure argon is less than about 10 mole percent of oxygen, the invention is proceeded in the sequential steps of a) removing chlorine from the impure argon stream; b) adding hydrogen to the impure argon stream; c) removing carbon dioxide and water from the impure argon stream; d) removing hydrogen from the impure argon stream; and e) removing nitrogen from the impure argon stream to form a purified argon stream. If the oxygen concentration in the impure argon is greater than about 10 mole percent of oxygen, the method comprises the sequential steps of a) removing chlorine from the impure argon stream; b) removing carbon dioxide and water from the impure argon stream; c) removing nitrogen and oxygen from the impure argon stream; d) adding hydrogen to the impure argon stream; e) removing water from the impure argon stream; f) removing hydrogen from the impure argon stream; and g) removing nitrogen from the impure argon stream to form a purified stream.

    摘要翻译： 本发明涉及一种从不纯的氩气流中纯化氩气的方法。 如果不纯的氩气中的氧气浓度小于约10摩尔％的氧气，则本发明按照以下顺序进行：a）从不纯的氩气流中除去氯气; b）向不纯的氩气流中加入氢气; c）从不纯的氩气流中除去二氧化碳和水; d）从不纯的氩气流中除去氢; 和e）从不纯的氩气流中除去氮气以形成纯化的氩气流。 如果不纯的氩气中的氧气浓度大于约10摩尔％的氧气，则该方法包括以下顺序步骤：a）从不纯的氩气流中除去氯气; b）从不纯的氩气流中除去二氧化碳和水; c）从不纯的氩气流中除去氮气和氧气; d）向不纯的氩气流中加入氢气; e）从不纯的氩气流中除去水; f）从不纯的氩气流中除去氢; 和g）从不纯的氩气流中除去氮气以形成纯化的物流。

    Method and apparatus for purification of argon
    7.
    发明授权
    Method and apparatus for purification of argon 失效
    用于纯化氩气的方法和装置

    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。

    Argon recovery from argon-oxygen-decarburization process waste gases
    9.
    发明授权
    Argon recovery from argon-oxygen-decarburization process waste gases 失效
    氩气回收氩气脱碳工艺废气

    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。