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    Argon recovery from argon-oxygen-decarburization process waste gases
    76.
    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：US5220797A

    公开(公告)日：1993-06-22

    申请号：US837744

    申请日：1992-02-19

    申请人： Ramachandran Krishnamurthy ,  Donald L. MacLean

    发明人： Ramachandran Krishnamurthy ,  Donald L. MacLean

    IPC分类号： B01D53/047 ,  F25J3/02

    CPC分类号： F25J3/08 ,  B01D53/0476 ,  F25J3/0285 ,  B01D2253/102 ,  B01D2253/106 ,  B01D2253/108 ,  B01D2253/116 ,  B01D2256/12 ,  B01D2256/18 ,  B01D2257/102 ,  B01D2257/104 ,  B01D2257/502 ,  B01D2257/504 ,  B01D2259/40001 ,  B01D2259/40015 ,  B01D2259/4003 ,  B01D2259/40066 ,  B01D2259/40069 ,  B01D2259/404 ,  B01D2259/416 ,  F25J2200/02 ,  F25J2205/40 ,  F25J2205/60 ,  F25J2205/82 ,  F25J2215/58 ,  F25J2270/12 ,  F25J2270/14 ,  F25J2270/42 ,  Y02C10/08 ,  Y10S62/924

    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的方法，其中从离开变压吸附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。

    Process for purification of a gas stream by a nitrogen scrubbing
    77.
    发明授权
    Process for purification of a gas stream by a nitrogen scrubbing 失效
    通过氮气洗涤净化气流的方法

    公开(公告)号：US4765814A

    公开(公告)日：1988-08-23

    申请号：US84249

    申请日：1987-08-12

    申请人： Heinz Bauer ,  Hans Becker ,  Walter Scholz

    发明人： Heinz Bauer ,  Hans Becker ,  Walter Scholz

    IPC分类号： C01B3/50 ,  F25J3/02

    CPC分类号： F25J3/0276 ,  C01B3/506 ,  F25J3/0219 ,  C01B2203/0465 ,  C01B2203/047 ,  C01B2203/048 ,  F25J2205/30 ,  F25J2210/42 ,  F25J2235/42 ,  F25J2240/02 ,  F25J2270/04 ,  F25J2270/14 ,  Y02P20/129 ,  Y10S62/934

    摘要： In a process proposed for purification of a gas stream at elevated pressure by nitrogen scrubbing, the gas stream to be purified and the nitrogen scrubbing stream are initially cooled to low temperatures. The gas stream is then scrubbed with liquid nitrogen and the purified gas stream is mixed with cooled, high-pressure nitrogen to form a mixture in which nitrogen accumulates partly as a liquid phase. The mixture thus formed is then heated and the liquid nitrogen contained therein is evaporated. Prior to scrubbing, either the nitrogen scrubbing stream itself or a partial stream of the nitrogen scrubbing stream or another process stream under a pressure lower than the working pressure of the nitrogen scrubbing step is at least partly condensed and then pumped to a higher pressure. The condensation of this low-pressure stream provides a reduction in the temperature difference at the cold end of the heat exchangers upstream of the scrubbing step resulting in the reduction of the energy requirements of the process.

    摘要翻译： 在提出通过氮气洗涤在升高的压力下纯化气流的方法中，待纯化的气流和氮气洗涤流最初被冷却至低温。 然后将气流用液氮洗涤，并将纯化的气流与冷却的高压氮气混合以形成其中氮部分地作为液相积聚的混合物。 然后将如此形成的混合物加热，并将其中所含的液氮蒸发。 在进行洗涤之前，在氮洗涤步骤的工作压力以下的压力下，氮气洗涤物流本身或氮气洗涤物流的一部分流或另一种工艺物流至少部分冷凝，然后泵送至更高的压力。 该低压流的冷凝提供了在洗涤步骤上游的热交换器的冷端处的温度差的降低，导致该方法的能量需求的降低。

    Vapor control system
    79.
    发明授权
    Vapor control system 失效
    蒸汽控制系统

    公开(公告)号：US3995440A

    公开(公告)日：1976-12-07

    申请号：US644210

    申请日：1975-12-24

    申请人： George E. Wengen

    发明人： George E. Wengen

    IPC分类号： F25J1/02 ,  F17C7/02

    CPC分类号： F25J1/0222 ,  F25J1/0025 ,  F25J2210/60 ,  F25J2270/14

    摘要： A system for preventing substantial pollution of the atmosphere by benzene vapors displaced from a tank truck during loading of the truck with benzene. The benzene is loaded into the truck at its ambient temperature, and benzene vapors displaced from the truck are cooled to condense them to a liquid state. The system for cooling the benzene vapors is one in which natural gas at high pressure is expanded to a lower pressure, and the cooling effect which takes place during the expansion is utilized to cool and condense the benzene vapors.

    摘要翻译： 一种系统，用于在卡车与苯装载期间防止从坦克卡车中排出的苯蒸气对大气的大量污染。 苯在其环境温度下装载到卡车中，并且从卡车中移出的苯蒸气被冷却以将其冷凝成液体状态。 用于冷却苯蒸汽的系统是将高压天然气膨胀到较低压力的系统，并且利用膨胀期间发生的冷却效应来冷却和冷凝苯蒸汽。