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    Method and apparatus for producing clean dry air having application to air separation
    1.
    发明授权
    Method and apparatus for producing clean dry air having application to air separation 失效
    用于空气分离的清洁干燥空气的生产方法和装置

    公开(公告)号：US6077488A

    公开(公告)日：2000-06-20

    申请号：US44408

    申请日：1998-03-19

    申请人： Ravi Jain ,  James K. Tseng

    发明人： Ravi Jain ,  James K. Tseng

    IPC分类号： B01D53/04 ,  B01D53/047 ,  B01D53/26 ,  F25J3/04 ,  F25J3/08 ,  B01D53/23

    CPC分类号： F25J3/044 ,  B01D53/04 ,  F25J3/04163 ,  F25J3/04169 ,  F25J3/04181 ,  F25J3/04284 ,  B01D2253/104 ,  B01D2253/106 ,  B01D2253/108 ,  B01D2257/504 ,  B01D2257/80 ,  B01D2259/403 ,  B01D2259/4146 ,  B01D2259/416 ,  B01D53/0462 ,  B01D53/047 ,  F25J2200/72 ,  F25J2205/04 ,  F25J2205/82 ,  F25J2215/40 ,  F25J2245/40 ,  Y02C10/08

    摘要： A method and apparatus for producing a clean dry air product stream. In accordance with the method and apparatus, a compressed feed air stream is introduced into one adsorption bed to adsorb moisture and carbon dioxide and to produce a first intermediate product stream. Impurities contained within the first intermediate product stream such as hydrocarbons, carbon monoxide and hydrogen are catalytically reacted to produce a second intermediate product stream that contains additional carbon dioxide and moisture produced from the catalytic reaction. The second intermediate product stream is introduced into another adsorption bed that adsorbs the additional moisture and carbon dioxide formed by the catalytic reaction to produce the clean dry air product stream. The present invention can be used alone to serve the need of supplying a clean dry air product stream. Additionally, it can be used as a prepurification unit of an air separation plant designed to produce an ultra-high purity industrial gas product. By catalytically reacting the hydrocarbons in the first intermediate product stream, less expensive oil lubricated compression equipment can be used to compress the feed air.

    摘要翻译： 一种用于生产清洁干燥空气产品流的方法和设备。 根据该方法和装置，将压缩的进料空气流引入一个吸附床中以吸收水分和二氧化碳并产生第一中间产物流。 包含在第一中间产物流如烃，一氧化碳和氢气中的杂质被催化反应以产生含有另外的二氧化碳和由催化反应产生的水分的第二中间产物流。 将第二中间产物流引入另一个吸附床，吸附床通过催化反应形成的附加水分和二氧化碳，以产生清洁的干燥空气产物流。 本发明可以单独使用以满足供应干净的干燥空气产品流的需要。 此外，它可以用作设计用于生产超高纯度工业气体产品的空气分离设备的预纯化单元。 通过使第一中间产物流中的烃催化反应，可以使用较便宜的油润滑压缩设备来压缩进料空气。

    Process and apparatus for gas purification
    2.
    发明授权
    Process and apparatus for gas purification 失效
    气体净化工艺和设备

    公开(公告)号：US5728198A

    公开(公告)日：1998-03-17

    申请号：US722687

    申请日：1996-09-30

    申请人： Divyanshu R. Acharya ,  Ravi Jain ,  James K. Tseng

    发明人： Divyanshu R. Acharya ,  Ravi Jain ,  James K. Tseng

    IPC分类号： B01D53/04 ,  B01J20/18 ,  B01D53/26

    CPC分类号： B01D53/02 ,  B01D2253/104 ,  B01D2253/108 ,  B01D2253/25 ,  B01D2253/304 ,  B01D2257/504 ,  B01D2257/80 ,  B01D2259/40081 ,  B01D2259/40086 ,  B01D2259/402 ,  B01D2259/4146 ,  B01D53/0446 ,  B01D53/0462 ,  B01D53/261 ,  Y02C10/08

    摘要： An air prepurification system which includes vertically oriented adsorption vessels containing, from top to bottom, a layer of moisture-selective adsorbent, a first layer of carbon dioxide-selective adsorbent and a second layer of carbon dioxide-selective adsorbent wherein the particle size of carbon dioxide-selective adsorbent in the second layer of carbon dioxide-selective adsorbent is smaller than the particle size of both the moisture-selective adsorbent and the carbon dioxide-selective adsorbent in the first layer of carbon dioxide-selective adsorbent. The air purification system is designed for use in a temperature swing adsorption process in which air is passed downwardly through the adsorption vessels during the adsorption step and upwardly through the vessels during the adsorbent regeneration step.

    摘要翻译： 一种空气预净化系统，其包括垂直定向的吸附容器，其从上至下包含一层湿选择性吸附剂，第一层二氧化碳选择性吸附剂和第二层二氧化碳选择性吸附剂，其中碳的粒度 第二层二氧化碳选择性吸附剂中的二氧化物选择性吸附剂小于第一层二氧化碳选择性吸附剂中的水分选择性吸附剂和二氧化碳选择性吸附剂的粒度。 空气净化系统设计用于变温吸附过程，其中空气在吸附步骤期间向下通过吸附容器并且在吸附剂再生步骤期间向上通过容器。

    Air purification process
    4.
    发明授权
    Air purification process 失效
    空气净化过程

    公开(公告)号：US5906675A

    公开(公告)日：1999-05-25

    申请号：US940319

    申请日：1997-09-30

    申请人： Ravi Jain ,  James K. Tseng

    发明人： Ravi Jain ,  James K. Tseng

    IPC分类号： B01D53/047 ,  B01D53/26

    CPC分类号： B01D53/0462 ,  B01D53/047 ,  B01D53/261 ,  F25J3/04163 ,  F25J3/04169 ,  B01D2253/104 ,  B01D2253/108 ,  B01D2257/504 ,  B01D2257/80 ,  B01D2259/403 ,  B01D2259/4146 ,  B01D2259/416 ,  F25J2205/64 ,  F25J2205/82 ,  F25J2215/44 ,  Y02C10/08

    摘要： An air prepurification process carried out in a battery of three adsorption vessels arranged in parallel. The process includes three steps: a first step in which non-steady state PSA is carried out in the first and second vessels operated in alternating adsorption and bed regeneration mode while the adsorbent in the third vessel undergoes thermal regeneration; a second step in which non-steady state PSA is carried out in the second and third vessels operated in alternating adsorption and bed regeneration modes while the adsorbent in the first vessel undergoes thermal regeneration; and a third step in which non-steady state PSA is carried out in the first and third vessels operated in alternating adsorption and bed regeneration modes while the adsorbent in the second vessel undergoes thermal regeneration. Each vessel contains at least two adsorbent layers, including a first layer of activated alumina, which adsorbs substantially all moisture and some carbon dioxide from the feed air, and a second layer of zeolite, which adsorbs substantially all of the remaining carbon dioxide in the feed air. The feed air may be passed through beds of hydrogen oxidation and carbon monoxide oxidation catalysts positioned between the first and second layers, to convert any hydrogen and carbon monoxide in the feed air to water vapor and carbon dioxide, respectively, these components being removed from the feed air as it passes through the layer of zeolite.

    摘要翻译： 空气预净化过程是在三个并联布置的吸附容器的电池中进行的。 该方法包括三个步骤：在第三容器中的吸附剂经受热再生的同时，在交替吸附和床再生模式下操作的第一和第二容器中进行非稳态PSA的第一步骤; 在第二容器和第三容器中以不同的吸附和床再生模式运行的非稳态PSA进行第二步骤，同时第一容器中的吸附剂进行热再生; 以及第三步骤，其中在第一和第三容器中以不同的吸附和床再生模式运行的第一和第三容器中进行非稳态PSA，而第二容器中的吸附剂经历热再生。 每个容器包含至少两个吸附剂层，其包括第一层活性氧化铝，其从进料空气中吸收基本上所有的水分和一些二氧化碳，以及第二层沸石，其吸附进料中基本上所有剩余的二氧化碳 空气。 进料空气可以通过位于第一和第二层之间的氢氧化和一氧化碳氧化催化剂床，以将进料空气中的任何氢和一氧化碳分别转化成水蒸汽和二氧化碳，这些组分从 进料空气通过沸石层。

    Air purification process
    7.
    发明授权
    Air purification process 失效
    空气净化过程

    公开(公告)号：US5914455A

    公开(公告)日：1999-06-22

    申请号：US940408

    申请日：1997-09-30

    申请人： Ravi Jain ,  James K. Tseng

    发明人： Ravi Jain ,  James K. Tseng

    IPC分类号： B01D53/02 ,  B01D53/04 ,  B01D53/047 ,  B01D53/053 ,  B01D53/26 ,  B01J20/18 ,  B01J20/34

    CPC分类号： B01D53/0462 ,  B01D53/047 ,  F25J3/04163 ,  F25J3/04169 ,  B01D2253/104 ,  B01D2253/108 ,  B01D2253/25 ,  B01D2257/108 ,  B01D2257/502 ,  B01D2257/504 ,  B01D2257/702 ,  B01D2257/80 ,  B01D2259/40001 ,  B01D2259/40056 ,  B01D2259/402 ,  B01D2259/4146 ,  B01D2259/416 ,  B01D53/0476 ,  B01D53/261 ,  F25J2205/64 ,  F25J2205/82 ,  F25J2215/44 ,  Y02C10/08

    摘要： An air prepurification process which includes, as a first step, a pressure swing adsorption process in which the air is passed through a bed of adsorbent which contains activated alumina, thereby effecting removal of substantially all moisture and most carbon dioxide from the feed air and as a second step, a temperature swing adsorption process in which the dried feed air is passed through a bed of carbon dioxide-selective adsorbent, thereby removing substantially all of the carbon dioxide remaining in the feed air. The feed air may be passed through beds of hydrogen oxidation and carbon monoxide oxidation catalysts between the first and second steps to convert any hydrogen and carbon monoxide in the feed air to water vapor and carbon dioxide, respectively, these components being removed from the feed air during the second step. The feed air may be optionally passed through a layer of a hydrocarbon selective adsorbent between the first and second steps to remove hydrocarbons such as ethylene, propylene and propane.

    摘要翻译： 一种空气预净化方法，其作为第一步骤包括变压吸附方法，其中空气通过含有活性氧化铝的吸附剂床，从而从进料空气中除去基本上所有的水分和大部分二氧化碳以及作为 第二步是将干燥的进料空气通过二氧化碳选择性吸附剂床，从而除去剩余在进料空气中的几乎所有的二氧化碳的变温吸附方法。 进料空气可以在第一步骤和第二步骤之间通过氢氧化和一氧化碳氧化催化剂床，以将进料空气中的任何氢气和一氧化碳分别转化成水蒸汽和二氧化碳，这些组分分别从进料空气中除去 在第二步。 进料空气可以任选地在第一步骤和第二步骤之间通过烃选择性吸附剂层，以除去烃如乙烯，丙烯和丙烷。

    Removal of nitric oxide from gas streams
    10.
    发明授权
    Removal of nitric oxide from gas streams 失效
    从气流中去除一氧化氮

    公开(公告)号：US06231824B1

    公开(公告)日：2001-05-15

    申请号：US09371315

    申请日：1999-08-10

    申请人： James K. Tseng ,  Mark H. Anderson ,  Shuen-Cheng Hwang ,  Robert Francis Workosky

    发明人： James K. Tseng ,  Mark H. Anderson ,  Shuen-Cheng Hwang ,  Robert Francis Workosky

    IPC分类号： C01B2100

    CPC分类号： B01D53/8631 ,  B01D2251/102 ,  B01D2251/104 ,  B01D2251/604 ,  B01D2255/50 ,  B01J29/061 ,  C01B21/38

    摘要： Nitric oxide is removed from a gas stream by contacting the gas stream with oxygen in the presence of a metal-cation exchanged zeolite, thereby oxidizing the nitric oxide to nitrogen dioxide, then contacting the resulting nitrogen dioxide-containing gas stream with ozone, thereby converting the nitrogen dioxide to nitric acid, nitric acid precursors or mixtures thereof, then contacting the gas stream with an aqueous liquid, thereby scrubbing the nitric acid, nitric acid precursors or mixtures thereof from the gas stream. Contact of the gas stream with oxygen in the presence of a zeolite is carried out at a temperature above the temperature at which significant adsorption of nitrogen dioxide occurs, and the aqueous liquid used as scrubbing agent preferably has a pH greater than 7.

    摘要翻译： 在金属 - 阳离子交换的沸石存在下使气流与氧接触，从气流中除去一氧化氮，从而将一氧化氮氧化成二氧化氮，然后使所得到的含二氧化氮的气流与臭氧接触，由此转化 二氧化氮至硝酸，硝酸前体或其混合物，然后使气流与水性液体接触，从而从气流中洗涤硝酸，硝酸前体或其混合物。 在沸石存在下，气流与氧气的接触在高于二氧化氮显着吸附的温度的温度下进行，作为洗涤剂使用的水性液体优选pH大于7。