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    Tandem waste stream treatment for the removal of nitroaromatics and nitrophenolics
    2.
    发明公开
    Tandem waste stream treatment for the removal of nitroaromatics and nitrophenolics 失效
    Tandemaufbereitung von einem Abfallstrom zur Beseitigung von Nitroaromaten und Nitrophenolen。

    公开(公告)号：EP0616980A1

    公开(公告)日：1994-09-28

    申请号：EP94104024.8

    申请日：1994-03-15

    申请人： AIR PRODUCTS AND CHEMICALS, INC.

    发明人： Adams, Keith Brian ,  Casas, Baldomero ,  Peter, Steven Bruce ,  Sawicki, John Edward

    IPC分类号： C02F1/72 ,  C02F1/28

    CPC分类号： C02F1/722 ,  C02F1/283 ,  C02F2101/38 ,  Y10S210/909

    摘要： A process for removing nitroaromatic and nitrophenolic compounds from an alkaline wastewater stream generated in a process for the nitration of aromatic compounds by the mixed acid technique, which comprises

    (a) adjusting the pH of the aqueous alkaline waste stream containing nitroaromatic and nitrophenolic compounds to a range from about 2 to 4.5,
    (b) contacting the acidic aqueous stream with sufficient hydrogen peroxide and ferrous ion under conditions to effect oxidation of the nitrophenolic compounds,
    (c) adjusting the acidic, oxidized aqueous waste stream having a reduced nitrophenolic content to about pH ≧ 4, and
    (d) contacting the aqueous waste stream with a carbon adsorbent.

    摘要翻译： 一种从通过混合酸法技术硝化芳族化合物的方法中产生的碱性废水流中除去硝基芳族和硝基酚化合物的方法，其包括（a）将含有硝基芳族化合物和硝基酚化合物的碱性废水流的pH调节至 在约2至4.5的范围内，（b）使酸性水流与足够的过氧化氢和亚铁离子在使硝基酚化合物氧化的条件下接触，（c）将具有降低的硝基酚含量的酸性氧化废水流调节至约 pH> = = 4，和（d）使废水与碳吸附剂接触。