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    Adsorptive xenon recovery process from a gas or liquid stream at cryogenic temperature
    2.
    发明授权
    Adsorptive xenon recovery process from a gas or liquid stream at cryogenic temperature 有权

    公开(公告)号：US11650010B2

    公开(公告)日：2023-05-16

    申请号：US16961402

    申请日：2018-12-12

    申请人： PRAXAIR TECHNOLOGY, INC.

    发明人： Hai Du ,  Michael J. Dray ,  James P. Meagher ,  Steven R. Falta

    IPC分类号： F25J3/04 ,  F25J3/08

    CPC分类号： F25J3/04757 ,  F25J3/04751 ,  F25J3/08 ,  F25J2205/68 ,  F25J2215/36 ,  F25J2220/82

    摘要： The present invention relates to an adsorption process for xenon recovery from a cryogenic liquid or gas stream wherein a bed of adsorbent is contacted with a xenon-containing liquid or gas stream selectively adsorbing the xenon from said stream. The adsorption bed is operated to at least near full breakthrough with xenon to enable a deep rejection of other stream components, prior to regeneration using the temperature swing method. After the stripping step, the xenon adsorbent bed is drained to clear out the liquid residue left in the nonselective void space and the xenon molecules in those void spaces is recycled upstream to the ASU distillation column for increasing xenon recovery. The xenon adsorbent bed is optionally purged with oxygen, followed by purging with gaseous argon at cryogenic temperature (≤160 K) to displace the oxygen co-adsorbed on the AgX adsorbent due to higher selectivity of argon over oxygen on the AgX adsorbent. By the end of this step, the xenon adsorbent bed is filled with argon and xenon. Then the entire adsorbent bed is heated indirectly without utilizing any of the purge gas for direct heating. Operating the adsorption bed to near full breakthrough with xenon and displacing the adsorbed oxygen and other residues with argon, prior to regeneration, along with indirect heating of the bed, enables production of a high purity product ≥40 vol % xenon from the adsorption bed and further enables safely heating without any purge gas and ease for downstream product collection, even in cases where hydrocarbons are co-present in the feed stream.

    Method for treating a gas by adsorption and corresponding installation
    6.
    发明申请
    Method for treating a gas by adsorption and corresponding installation 有权
    通过吸附和相应的安装处理气体的方法

    公开(公告)号：US20040055465A1

    公开(公告)日：2004-03-25

    申请号：US10250430

    申请日：2003-06-27

    发明人： Alain Guillard ,  Jan-Marc Peyron

    IPC分类号： B01D053/02

    CPC分类号： F25J3/04181 ,  B01D53/047 ,  B01D53/261 ,  B01D2253/104 ,  B01D2253/108 ,  B01D2257/504 ,  B01D2257/80 ,  B01D2259/40003 ,  B01D2259/40009 ,  B01D2259/40056 ,  B01D2259/40062 ,  B01D2259/40081 ,  B01D2259/402 ,  B01D2259/4143 ,  F25J3/04775 ,  F25J2205/68 ,  Y02C10/08

    摘要： The invention concerns a method which consists in using only two adsorbers which follow each a phase-shifted cycle successively consisting in an adsorption phase, at high pressure of the cycle and a regeneration phase, ending in repressurizing of the absorber. The method comprises a step which consists in paralleling the adsorbers in adsorption phase for a predetermined time interval much longer than the switching time of the valves controlling the adsorbers starting said step and/or as long as the difference in temperature between that of a total flux and that of a first flow rate is greater than a predetermined threshold temperature. The invention is applicable to air purification before distillation.

    摘要翻译： 本发明涉及一种方法，该方法包括仅使用两个吸附器，每个吸附器在循环的高压和再生阶段连续地包含吸附相中的每一个相移循环，结束吸收器的再加压。 该方法包括以下步骤：在吸附阶段中将吸附剂并联至预定时间间隔，其长度大于开始控制从所述步骤开始的吸附剂的阀的切换时间，和/或只要总通量的温度差 并且第一流量的值大于预定阈值温度。 本发明适用于蒸馏前的空气净化。

    Sacrificial cryogen gas liquefaction system
    9.
    发明授权
    Sacrificial cryogen gas liquefaction system 有权
    牺牲冷冻气体液化系统

    公开(公告)号：US06598423B1

    公开(公告)日：2003-07-29

    申请号：US10046665

    申请日：2002-01-22

    申请人： Claus Emmer ,  Thomas K. Drube

    发明人： Claus Emmer ,  Thomas K. Drube

    IPC分类号： F25J100

    CPC分类号： B01D53/261 ,  B01D53/04 ,  B01D53/0446 ,  B01D2256/24 ,  B01D2257/504 ,  B01D2257/80 ,  B01D2259/402 ,  B01D2259/416 ,  F25J1/0022 ,  F25J1/0221 ,  F25J2205/66 ,  F25J2205/68 ,  F25J2210/42 ,  F25J2245/42 ,  F25J2245/90 ,  F25J2260/42 ,  F25J2290/62 ,  Y02C10/08

    摘要： A liquefaction system includes a source tank containing a supply of liquid nitrogen with a head space there above filled with nitrogen vapor. A pump transfers the liquid nitrogen to a heat exchanger. The heat exchanger also receives natural gas that has been processed in a purifier. The natural gas is liquefied by free cold from the liquid nitrogen so that liquid natural gas (LNG) is produced. The LNG travels to an LNG destination tank for storage and/or transport. The liquid nitrogen is vaporized in the heat exchanger. The resulting nitrogen gas is directed to a process system that may include, for example, cylinders for welding or other applications. Between liquefaction cycles, the purifier is regenerated by a vacuum and nitrogen vapor from the head space of the source tank. Steel shot is mixed with absorbent in the purifier so that the absorbent is cooled for increased performance.

    摘要翻译： 液化系统包括一个含有液氮供应源的源罐，上面填充有氮气蒸气。 泵将液氮转移到热交换器。 热交换器还接收在净化器中处理过的天然气。 天然气由液氮自由冷却，液化天然气（LNG）生产。 LNG运往LNG目的地储罐进行储存和/或运输。 液氮在热交换器中蒸发。 得到的氮气被引导到处理系统，其可以包括例如用于焊接或其它应用的气缸。 在液化循环之间，净化器通过真空和氮气从源罐的顶部空间再生。 将钢丸与净化器中的吸收剂混合，使得吸收剂被冷却以提高性能。