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    Closed-loop thermal regeneration of adsorbents containing reactive adsorbates
    2.
    发明授权
    Closed-loop thermal regeneration of adsorbents containing reactive adsorbates 失效
    含有反应性吸附剂的吸附剂的闭环热再生

    公开(公告)号：US4971606A

    公开(公告)日：1990-11-20

    申请号：US433078

    申请日：1989-11-06

    申请人： Shivaji Sircar ,  Roger R. Conrad ,  William R. Koch

    发明人： Shivaji Sircar ,  Roger R. Conrad ,  William R. Koch

    IPC分类号： B01D53/04

    CPC分类号： B01D53/047 ,  B01D53/0462 ,  B01D2253/102 ,  B01D2253/104 ,  B01D2253/106 ,  B01D2253/108 ,  B01D2257/80 ,  B01D2259/4009 ,  B01D53/0446 ,  Y10S95/902

    摘要： A method is disclosed for the thermal regeneration of an adsorbent which contains adsorbed components which can react with and damage the adsorbent at regeneration temperatures. The method comprises passing a hot regeneration gas through a bed of the adsorbent at a sufficiently high flow rate such that the residence time and reaction of the desorbed components in the adsorbent bed are minimized. For removing water from CaX or SrX zeolites, the flow of nitrogen regeneration gas is controlled so that the nitrogen gas residence time in the bed is less than one second.

    摘要翻译： 公开了一种用于吸附剂的热再生的方法，该吸附剂含有可在再生温度下与吸附剂反应并损坏吸附剂的吸附组分。 该方法包括使热再生气体以足够高的流速通过吸附剂床，使得吸附床中解吸组分的停留时间和反应最小化。 为了从CaX或SrX沸石中除去水，控制氮气再生气体的流动，使得在床中的氮气停留时间小于1秒。

    Argon purification
    5.
    发明授权
    Argon purification 失效
    氩气净化

    公开(公告)号：US4477265A

    公开(公告)日：1984-10-16

    申请号：US405643

    申请日：1982-08-05

    申请人： Ravi Kumar ,  Shivaji Sircar ,  Thomas R. White ,  Eugene J. Greskovich

    发明人： Ravi Kumar ,  Shivaji Sircar ,  Thomas R. White ,  Eugene J. Greskovich

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

    CPC分类号： B01D53/0446 ,  B01D53/0476 ,  C01B23/00 ,  F25J3/04733 ,  B01D2253/102 ,  B01D2253/108 ,  B01D2256/18 ,  B01D2257/102 ,  B01D2257/104 ,  B01D2259/402 ,  B01D2259/41 ,  B01D2259/4145 ,  B01D2259/416 ,  F25J2205/60 ,  F25J2205/82

    摘要： Argon is recovered from a gas stream comprising the same in admixture with oxygen and nitrogen, by a vacuum swing adsorption (VSA) process wherein the mixed gas is passed through an adsorbent bed having thermodynamic selectivity for adsorption of nitrogen and the unadsorbed portion then passed through a second adsorbent bed having kinetic selectivity for retaining oxygen. Both adsorbent beds are regenerated by vacuum desorption, applied to the first bed for a longer time period than that of the second bed. Further purification of the recovered argon may be carried out, if desired, by catalytic hydrogenation of residual oxygen therein. The mixed gas stream fed to the VSA unit may be that obtained from the crude argon column associated with a cryogenic air separation plant and the waste gas from the VSA unit may be recycled to the main column of the cryogenic air separation plant, thus enhancing argon recovery.

    摘要翻译： 通过真空挥发吸附（VSA）方法从包含该氧气和氮气的气流中回收氩气，其中混合气体通过具有用于吸附氮的热力学选择性的吸附剂床，然后未吸附的部分通过 具有保持氧的动力学选择性的第二吸附床。 两种吸附剂床均通过真空解吸再生，与第二床相比施加到第一床上更长的时间段。 如果需要，可以通过对其中的残余氧的催化氢化来进行回收的氩的进一步纯化。 供给到VSA单元的混合气流可以是从与低温空气分离设备相关联的粗氩塔获得的，并且来自VSA单元的废气可以再循环到低温空气分离设备的主塔，从而增强氩 复苏。

    Miniature oxygen concentrators and methods
    6.
    发明授权
    Miniature oxygen concentrators and methods 有权
    微型氧气浓缩器和方法

    公开(公告)号：US08226745B2

    公开(公告)日：2012-07-24

    申请号：US12769283

    申请日：2010-04-28

    申请人： Chai Siew-Wah ,  Shivaji Sircar ,  Mayuresh V. Kothare

    发明人： Chai Siew-Wah ,  Shivaji Sircar ,  Mayuresh V. Kothare

    IPC分类号： B01D53/047

    CPC分类号： B01D53/0473 ,  A61M16/101 ,  A61M2202/0208 ,  A61M2202/03 ,  B01D2253/104 ,  B01D2253/106 ,  B01D2253/108 ,  B01D2253/304 ,  B01D2256/12 ,  B01D2257/102 ,  B01D2257/80 ,  B01D2259/40077 ,  B01D2259/4146 ,  B01D2259/4533 ,  B01J20/08 ,  B01J20/103 ,  B01J20/186 ,  B01J20/28052 ,  A61M2202/0007

    摘要： Provided herein are new compact and miniature oxygen concentrator apparatus, as well as methods incorporating use of the apparatus. The apparatus and methods utilize selected cycle times, adsorbent specifications and novel conditions to produce a fast Pressure Swing Adsorption (“PSA”) system. The oxygen concentrator apparatus and methods herein have significant utility in the fields of biotechnology, engineering, and medicine. A particularly advantageous use of this invention is as a “snap on” portable oxygen concentrator, where piped compressed air is already available such as in civil and military hospitals, ambulances, air craft cabins, mobile fish tanks, etc. Those embodiments eliminate the need for dedicated moving machinery (blower, compressor, vacuum pump) normally associated with a conventional PSA oxygen concentrator.

    摘要翻译： 本文提供了新的紧凑型和微型氧气浓缩装置，以及结合使用该装置的方法。 该设备和方法利用选择的循环时间，吸附剂规格和新条件来产生快速压力摆动吸附（“PSA”）系统。 本发明的氧气浓缩装置和方法在生物技术，工程，医药领域具有重要的实用价值。 本发明的特别有利的用途是作为“快速”便携式氧气浓缩器，其中管道压缩空气已经可用，例如在民用和军用医院，救护车，飞机舱，移动鱼缸等中。这些实施例消除了需要 通常与常规PSA氧浓缩器相关联的专用移动机械（鼓风机，压缩机，真空泵）。

    Process for preparing motor fuel grade alcohol
    9.
    发明授权
    Process for preparing motor fuel grade alcohol 失效
    制备汽油燃油级酒精的方法

    公开(公告)号：US5030775A

    公开(公告)日：1991-07-09

    申请号：US502093

    申请日：1990-03-30

    申请人： Shivaji Sircar

    发明人： Shivaji Sircar

    IPC分类号： C07C29/76

    CPC分类号： C07C29/76

    摘要： A process for preparing motor fuel grade alcohol wherein an ethanol fermentation reactor effluent is distilled to produce an overhead product comprising 10 to about 40 mole percent ethanol and a bottom product comprising the non-alcoholic components. The motor fuel grade alcohol is recovered in high yield from the ethanol/water overhead product mixture in a liquid phase cyclic selective adsorption process which comprises a plurality of adsorption columns operated in cycle in a predetermined time sequence, each adsorption column containing an adsorbent, wherein each respective adsorption column undergoes successive steps of adsorption, desorption and rinsing.

    摘要翻译： 一种制备马达燃料级醇的方法，其中将乙醇发酵反应器流出物蒸馏以产生包含10至约40摩尔％乙醇的塔顶产物和包含非醇组分的底部产物。 在液相循环选择性吸附方法中，从乙醇/水塔顶产物混合物中以高产率回收汽油燃料级酒精，其包括以预定时间顺序循环运行的多个吸附塔，每个吸附塔含有吸附剂，其中 每个相应的吸附柱经历吸附，解吸和漂洗的连续步骤。