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    • 9. 发明授权
    • Treatment/removal of byproduct aqueous effluents comprising
hydroxynitro-aromatic compounds
    • 包含羟基硝基芳族化合物的副产物含水废水的处理/除去
    • US5820764A
    • 1998-10-13
    • US959731
    • 1997-10-28
    • Faouzi JoulakLouis Le BrisPhilippe Marion
    • Faouzi JoulakLouis Le BrisPhilippe Marion
    • C02F1/66C02F9/00C07C201/16C02F1/52
    • C02F1/66C07C201/16C02F2103/36Y10S210/909
    • Objectionable byproduct aqueous effluents containing contaminating amounts of hydroxynitroaromatic compounds, in particular those aqueous effluents produced during the synthesis of nitroaromatic compounds, e.g., dinitrotoluenes, via reaction of an aromatic compound with nitric acid in the presence of sulfuric acid, are efficiently, facilely and economically treated/removed by (a) intimately contacting a mixture of at least one nitroaromatic compound and at least one hydroxynitroaromatic compound with an aqueous wash medium containing a neutralizing agent, (b) separating the resulting admixture into an organic phase and an aqueous phase, (c) recycling a fraction of the separated aqueous phase to the aqueous wash medium to thus constitute a portion thereof, and (d) periodically draining a fraction of the wash medium, whether to destruction thereof or to waste.
    • 含有污染量的羟基硝基芳族化合物的有害副产物含水废水,特别是在硫酸存在下通过芳族化合物与硝酸的反应合成硝基芳族化合物(例如二硝基甲苯)期间产生的含水废水,是有效,便利和经济的 通过(a)使至少一种硝基芳族化合物和至少一种羟基硝基芳族化合物的混合物与含有中和剂的水性洗涤介质紧密接触来处理/除去,(b)将所得混合物分离成有机相和水相( c)将分离的水相的一部分循环到水性洗涤介质中,从而构成其一部分,和(d)定期排出洗涤介质的一部分,不管其是否破坏或浪费。