Process for removing nitrogen oxides from gaseous mixtures
    3.
    发明授权
    Process for removing nitrogen oxides from gaseous mixtures 失效
    从气体混合物中除去氮氧化物的方法

    公开(公告)号:US4086327A

    公开(公告)日:1978-04-25

    申请号:US731739

    申请日:1976-10-12

    CPC分类号: B01D53/56

    摘要: Gaseous mixtures containing nitrogen oxides are contacted with an aqueous solution containing sodium sulfite, trisodium imidobissulfate and sodium sulfate while adjusting the pH thereof by sodium hydroxide or sodium carbonate, and sulfur dioxide is contacted therewith simultaneously or thereafter to produce therein disodium imidobissulfate and sodium hydrogensulfate, and then sodium hydroxide is added therein to deposit sodium sulfate 10 hydrate firstly and trisodium imidobissulfate 1 hydrate secondly, and thereafter the mother liquor is recycled as the absorption medium for nitrogen oxides.

    摘要翻译: 含有氮氧化物的气态混合物与含有亚硫酸钠,亚氨基二硫酸钠和硫酸钠的水溶液接触,同时用氢氧化钠或碳酸钠调节其pH值,并且二氧化硫与其同时或其后在其中制备二氨基二硫酸钠和硫酸氢钠, 然后加入氢氧化钠,首先沉积硫酸钠10水合物,然后再次将二水合氨基二硫酸盐1水合二水合,然后将母液作为氮氧化物的吸收介质再循环。