Process for the preparation of diacids from the washing waters of
cyclohexane oxidation products
    1.
    发明授权
    Process for the preparation of diacids from the washing waters of cyclohexane oxidation products 失效
    从环己烷氧化产物的洗涤水中制备二酸的方法

    公开(公告)号:US6015924A

    公开(公告)日:2000-01-18

    申请号:US989514

    申请日:1997-12-12

    申请人: Louis Le Bris

    发明人: Louis Le Bris

    CPC分类号: C07C51/27 C07C51/487

    摘要: The present invention relates to a process for the preparation of diacids or mixtures of diacids from aqueous solutions derived from the washing of cyclohexane oxidation products. More specifically, the present invention provides a process for the preparation of aliphatic diacids from washing waters derived from a process for the oxidation of cyclohexane and containing peroxides, the process of the invention comprising successively:(a) at least partially deperoxidizing said washing waters by subjecting them to catalytic hydrogenation at a temperature of between about 0.degree. C. and about 100.degree. C., in the presence of at least one platinum group metal;(b) oxidizing with nitric acid the products contained in the washing waters after deperoxidation.

    摘要翻译: 本发明涉及一种由环己烷氧化产物洗涤得到的水溶液制备二酸或二酸混合物的方法。 更具体地说,本发明提供了一种从洗涤水中制备脂肪族二酸的方法,该方法由环己烷氧化和含有过氧化物的方法得到,本发明的方法包括:(a)至少部分地将所述洗涤水去氧化, 在至少一种铂族金属的存在下,在约0℃至约100℃的温度下进行催化氢化; (b)在脱氧后用硝酸氧化洗涤水中含有的产物。

    Treatment/removal of byproduct aqueous effluents comprising
hydroxynitro-aromatic compounds
    2.
    发明授权
    Treatment/removal of byproduct aqueous effluents comprising hydroxynitro-aromatic compounds 失效
    包含羟基硝基芳族化合物的副产物含水废水的处理/除去

    公开(公告)号:US5820764A

    公开(公告)日:1998-10-13

    申请号:US959731

    申请日:1997-10-28

    摘要: 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.

    摘要翻译: 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。

    Method for treating aqueous solutions comprising acids and nitrated compounds
    3.
    发明授权
    Method for treating aqueous solutions comprising acids and nitrated compounds 有权
    用于处理包含酸和硝化化合物的水溶液的方法

    公开(公告)号:US06254789B1

    公开(公告)日:2001-07-03

    申请号:US09485498

    申请日:2000-05-03

    IPC分类号: C02F104

    摘要: The invention concerns a method for treating an aqueous solution derived from sluicing of crude mononitrated or dinitrated aromatic compounds obtained by nitration of the corresponding aromatic compounds, consisting in: (a) contacting said aqueous solution with said aromatic compound thereby obtaining an aqueous phase and an organic phase; (b) recycling said organic phase in the nitration process; (c) distilling said aqueous phase; (d) recycling the resulting concentrated acid solution in the nitration process; (e) recycling or eliminating the recuperated water after distillation.

    摘要翻译: 本发明涉及一种处理衍生自通过硝化相应芳族化合物而得到的粗单硝化或二硝化芳族化合物的水溶液的方法,其包括:(a)使所述水溶液与所述芳族化合物接触,从而获得水相和 有机相; (b)在硝化过程中回收所述有机相; (c)蒸馏所述水相; (d)在硝化过程中回收所得浓酸溶液; (e)蒸馏后回收或除去回收的水。

    Treatment/removal of byproduct aqueous effluents comprising
hydroxynitroaromatic compounds
    4.
    发明授权
    Treatment/removal of byproduct aqueous effluents comprising hydroxynitroaromatic compounds 失效
    处理/除去包含羟基硝基芳族化合物的副产物含水废水

    公开(公告)号:US5554299A

    公开(公告)日:1996-09-10

    申请号:US367873

    申请日:1995-01-03

    摘要: 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.

    摘要翻译: 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。