Process for removing a nitrogen gas from mixture comprising N.sub.2 and
CO or N.sub.2 ' CO.sub.2 and CO
    4.
    发明授权
    Process for removing a nitrogen gas from mixture comprising N.sub.2 and CO or N.sub.2 ' CO.sub.2 and CO 失效
    从包含N 2和CO 2或CO 2和CO 2的混合物中除去氮气的方法

    公开(公告)号:US4468238A

    公开(公告)日:1984-08-28

    申请号:US517272

    申请日:1983-07-26

    摘要: Processes for removing N.sub.2 from a feed gas comprising CO+N.sub.2 or CO, CO.sub.2 +N.sub.2 through PSA by using at least two adsorption columns containing an adsorbent exhibiting selective adsorb property to carbon monoxide which comprises:(i) a step of pressurizing an adsorption column by the feed gas;(ii) a step of introducing the feed gas into the adsorption column, in which step (i) was previously completed, so as to adsorb CO, or CO+CO.sub.2 on or in the adsorbent;(iii) a step of connecting the adsorption column, in which step (ii) was previously completed, to the other adsorption column in which step (v) was previously completed, to reduce the pressure in the former adsorption column to one atmosphere or a pressure close to it;(iv) a step of purging nitrogen by passing product gas through the adsorption column;(v) a step of desorbing carbon monoxide adsorbed on or in the adsorbent of the adsorption column, by vacuum pump to recover a product gas; and(vi) a step of a connecting the adsorption column, in which step (v) was previously completed, to the other adsorption column in which step (ii) was previously completed to increase pressure in the former column,periodically switching the flow between or among said adsorption columns so as to repeat the above steps in all the adsorption columns.

    摘要翻译: 通过使用含有对一氧化碳具有选择性吸附性质的吸附剂的至少两个吸附柱,从包含CO + N 2或CO,CO 2 + N 2的进料气体中除去N 2的方法,该方法包括:(i)加压吸附塔 由进料气体 (ii)将进料气体引入到预先完成步骤(i)的吸附塔中以将吸附剂上或吸附剂中的CO或CO + CO 2吸附的步骤; (iii)将预先完成步骤(ii)的吸附塔连接到预先完成步骤(v)的另一个吸附塔上以将前一吸附塔中的压力降低至一个大气压或 靠近它的压力; (iv)使产物气体通过吸附塔而吹扫氮气的步骤; (v)通过真空泵将吸附在吸附塔上或其吸附剂上的一氧化碳解吸的步骤,以回收产物气体; 和(vi)将预先完成步骤(v)的吸附塔连接到预先完成步骤(ii)的另一个吸附塔以增加前一个塔中的压力的​​周期性地切换 或在所述吸附塔之间,以便在所有吸附塔中重复上述步骤。