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60 条记录 (耗时 0.033 秒)

    Deoxygenation of inert gas streams with methanol
    43.
    发明授权
    Deoxygenation of inert gas streams with methanol 失效
    惰性气流与甲醇脱氧

    公开(公告)号：US4859435A

    公开(公告)日：1989-08-22

    申请号：US205408

    申请日：1988-06-10

    申请人： George W. Roberts ,  Shivaji Sircar ,  Paul Stepanoff

    发明人： George W. Roberts ,  Shivaji Sircar ,  Paul Stepanoff

    IPC分类号： C01B21/04 ,  C01B23/00

    CPC分类号： C01B21/0422 ,  C01B23/00 ,  C01B2210/0045

    摘要： The present invention is directed to a process for removing minor amounts of oxygen from inert gas streams to result in very low levels of oxygen contamination in such inert gas streams, wherein the oxygen is removed by the action of stoichiometric quantities of methanol, which react with the oxygen over a catalyst at ambient feed temperature conditions without a requirement for external heating of the reaction.

    摘要翻译： 本发明涉及一种从惰性气流中除去少量氧气的方法，以在这种惰性气流中产生非常低水平的氧污染，其中通过化学计量的甲醇的作用除去氧气，其与 在环境进料温度条件下，催化剂上的氧气不需要外部加热反应。

    Preparation of high purity oxygen
    45.
    发明授权
    Preparation of high purity oxygen 失效
    制备高纯氧

    公开(公告)号：US4756723A

    公开(公告)日：1988-07-12

    申请号：US21862

    申请日：1987-03-04

    申请人： Shivaji Sircar

    发明人： Shivaji Sircar

    IPC分类号： B01D53/04 ,  B01D53/047 ,  C01B13/02

    CPC分类号： B01D53/047 ,  B01D2253/104 ,  B01D2253/108 ,  B01D2256/12 ,  B01D2257/102 ,  B01D2257/80 ,  B01D2259/404

    摘要： An oxygen-rich gas product of at least about 95% O.sub.2 purity is obtained from ambient air in a single-stage pressure swing adsorption operation carried out in four steps, comprised of: (a) selective adsorption of nitrogen from the air feed at superatmospheric pressure, (b) followed, without intermediate purge or rinse, by pressure let down through countercurrent gas withdrawal to about atmospheric level, (c) desorption by evacuation of the adsorbent bed to subatmospheric pressure level of 1/20 (5%) or less than 1/20.sup.th of the pressure prevailing during the adsorption step; and (d) repressuring the evacuated bed with part of the oxygen-rich effluent obtained during the adsorption step. Optionally, the operating cycle may include pressure equalization between two columns performed intermediate steps (a) and (b), whereby O.sub.2 recovery is increased. Under the prescribed conditions the oxygen production capacity at high purity level (.about.95%) is substantially increased.

    Production of oxygen enriched air
    46.
    发明授权
    Production of oxygen enriched air 失效
    生产富氧空气

    公开(公告)号：US4685939A

    公开(公告)日：1987-08-11

    申请号：US713503

    申请日：1985-03-19

    申请人： Wilbur C. Kratz ,  Shivaji Sircar

    发明人： Wilbur C. Kratz ,  Shivaji Sircar

    IPC分类号： C01B13/02 ,  B01D53/04 ,  B01D53/047 ,  C01B21/04

    CPC分类号： B01D53/0473 ,  B01D2253/108 ,  B01D2256/12 ,  B01D2257/102 ,  B01D2257/504 ,  B01D2257/80 ,  B01D2259/4003 ,  B01D2259/40052 ,  B01D2259/4006 ,  B01D2259/40062 ,  B01D2259/40081 ,  B01D2259/403 ,  B01D2259/404 ,  B01D2259/4145 ,  Y02C10/08

    摘要： A pressure swing adsorption process is provided for the direct production from ambient air of a moderately enriched oxygen product gas. The production of a product gas having an oxygen concentration of 23 to 30% is effected by a three step cycle wherein (1) the feed air is charged to a bed of nitrogen selective adsorbent until the bed is brought from atmospheric pressure to a pressure in the range of up to 10 atmospheres, (2) reducing the bed pressure to an intermediate level by withdrawal of oxygen enriched product gas therefrom and (3) finally venting the bed to restore atmospheric pressure. By an alternative mode including a fourth step of purging the bed following the venting step, a product of 23 to 45% oxygen concentration is obtained.

    摘要翻译： 提供了一种变压吸附方法，用于从中等浓度的氧气产物气体的环境空气直接生产。 氧浓度为23〜30％的产物气体的生产通过三步循环进行，其中（1）将进料空气加入到氮气选择性吸附剂床中，直到床从大气压升至 最多10个大气压的范围，（2）通过从其中抽出富氧产物气体将床压降低至中间水平;（3）最后排空床以恢复大气压力。 通过包括在排气步骤之后净化床的第四步骤的替代方式，获得23至45％氧浓度的产物。

    Air fractionation by pressure swing adsorption
    49.
    发明授权
    Air fractionation by pressure swing adsorption 失效
    通过变压吸附空气分馏

    公开(公告)号：US4329158A

    公开(公告)日：1982-05-11

    申请号：US159086

    申请日：1980-06-13

    申请人： Shivaji Sircar

    发明人： Shivaji Sircar

    IPC分类号： B01D53/04 ,  B01D53/047 ,  C01B13/02 ,  C01B21/04

    CPC分类号： B01D53/0462 ,  B01D53/047 ,  B01D2256/10 ,  B01D2256/12 ,  B01D2257/102 ,  B01D2257/504 ,  B01D2257/80 ,  B01D2259/40052 ,  B01D2259/40069 ,  B01D2259/40081 ,  B01D2259/402 ,  B01D2259/404 ,  B01D2259/4061 ,  Y02C10/08

    摘要： Improved oxygen recovery in the operation of a pressure swing adsorption system for air fractionation is obtained by passng the air, freed of water and CO.sub.2, through an adsorbent bed maintained at elevated temperature throughout the cycle and which is selective for retention of nitrogen, and consequent withdrawal of an oxygen-rich primary effluent product. In a preferred embodiment ambient air is passed through a pretreater section providing an adsorbent bed for removal of water and carbon dioxide. The thus purified air is compressed with consequent rise in temperature and then only partly cooled down by exchange with cooler desorbed and purged nitrogen-rich gas products withdrawn from the main adsorbent beds. These nitrogen-rich products thus heated by the exchange are employed in regenerating a water and carbon dioxide laden bed of the pretreater section. While the adsorption-desorption is operated in a pressure swing cycle, the pretreater section is operated in an independent thermal swing cycle. Alternatively, the feed air may be compressed prior to its introduction into the pretreater and the thus generated heat utilized by heat exchange for heating the purified air effluent to be fractionated.

    摘要翻译： 通过在整个循环中通过保持在高温下的吸附剂床的空气，除去水和二氧化碳，从而获得用于空气分馏的变压吸附系统操作中的氧气回收率，并且对于保留氮气是有选择性的 取出富氧一级流出物。 在优选的实施方案中，环境空气通过预净化器部分，提供用于除去水和二氧化碳的吸附床。 因此净化的空气随之升高而被压缩，然后仅通过与从主吸附剂床抽出的较冷解吸和吹扫的富氮气体产物的交换部分地冷却。 这些通过交换加热的富氮产品被用于再生预处理器部分的含二氧化碳的二氧化碳床。 当吸附 - 解吸在压力摆动循环中运行时，预处理器部分在独立的热循环循环中运行。 或者，进料空气可以在其被引入预处理器之前被压缩，并且由此产生的热量通过热交换来加热要分馏的净化空气流出物。