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

    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。