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    PROCESS FOR PURIFYING WASTEWATERS FROM THE WORKUP OF CRUDE AROMATIC NITRO COMPOUNDS
    1.
    发明申请
    PROCESS FOR PURIFYING WASTEWATERS FROM THE WORKUP OF CRUDE AROMATIC NITRO COMPOUNDS 审中-公开
    从原料硝酸化合物的工作中净化废水的方法

    公开(公告)号：US20130041188A1

    公开(公告)日：2013-02-14

    申请号：US13567265

    申请日：2012-08-06

    申请人： Julia Leschinski ,  Petra Deckert ,  Leo Denissen ,  Bart Van De Voorde ,  Stefan Robert Deibel ,  Matthias Fankhänel ,  Samuel Neto

    发明人： Julia Leschinski ,  Petra Deckert ,  Leo Denissen ,  Bart Van De Voorde ,  Stefan Robert Deibel ,  Matthias Fankhänel ,  Samuel Neto

    IPC分类号： C07C201/16 ,  C02F1/68

    CPC分类号： C07C201/16 ,  C07C205/06

    摘要： The invention relates to a process for purifying crude aromatic nitro compounds which originate from the nitration of aromatic compounds, comprising the following wash stages (a1) and (a2), where each of stages (a1) and (a2) may be performed once or more than once in succession: (a1) contacting the crude aromatic nitro compound (N1-in) with a first aqueous phase (W1-in) comprising at least one base (B) and then separating the phases to obtain an organic phase (N1-res)and an aqueous phase (W1-res); and then (a2) contacting the organic phase (N1-res) obtained in stage (a1) with a second aqueous phase (W2-in) and then separating the phases to obtain a purified organic phase (N2-res) and at least one aqueous phase (W2-res), the aqueous phase used (W2-in) having a pH of 6 to 9.

    摘要翻译： 本发明涉及一种纯化芳族硝基化合物的方法，该方法源自芳族化合物的硝化，包括以下洗涤阶段（a1）和（a2），其中每个阶段（a1）和（a2）可以进行一次，或 （a1）使粗芳族硝基化合物（N1-in）与包含至少一个碱（B）的第一水相（W1-in）接触，然后分离相以获得有机相（N1 -res）和水相（W1-res）; 然后（a2）使阶段（a1）中获得的有机相（N1-res）与第二水相（W2-in）接触，然后分离相以获得纯化的有机相（N2-res）和至少一种 水相（W2-res），使用的水相（W2-in）的pH为6〜9。

    PROCESS FOR PURIFYING WASTEWATERS FROM THE WORKUP OF CRUDE AROMATIC NITRO COMPOUNDS
    2.
    发明申请
    PROCESS FOR PURIFYING WASTEWATERS FROM THE WORKUP OF CRUDE AROMATIC NITRO COMPOUNDS 审中-公开
    从原料硝酸化合物的工作中净化废水的方法

    公开(公告)号：US20120205308A1

    公开(公告)日：2012-08-16

    申请号：US13207266

    申请日：2011-08-10

    申请人： Julia Leschinski ,  Leo Denissen ,  Ludwig E. Heck ,  Peter Gammer ,  Bart Van De Voorde ,  Andreas Heußler ,  Samuel Neto

    发明人： Julia Leschinski ,  Leo Denissen ,  Ludwig E. Heck ,  Peter Gammer ,  Bart Van De Voorde ,  Andreas Heußler ,  Samuel Neto

    IPC分类号： C02F9/10

    CPC分类号： C02F9/00 ,  C02F1/04 ,  C02F1/20 ,  C02F1/26 ,  C02F1/66 ,  C02F2103/36

    摘要： The invention relates to a process for working up wastewaters which are obtained in the purification of crude aromatic nitro compounds after the nitration of aromatic compounds, comprising the following steps: (a) single-stage or multistage washing of the crude aromatic nitro compound to obtain at least one organic phase and at least one aqueous phase, and removal of the aqueous phase or of the aqueous phases, step (a) comprising the addition of a base other than ammonia, and then (b) optional removal of organic constituents from at least a portion of the aqueous phase or aqueous phases obtained in step (a) by stripping, preferably with steam, then (c) removal of organic compounds from at least a portion of the aqueous phase or aqueous phases resulting from step (a) or step (b) by thermal and/or oxidative degradation, then (d) distillative depletion of ammonia from at least a portion of the aqueous phase or aqueous phases resulting from step (c), and then (e) optional supply of at least a portion of the aqueous phase resulting from step (d) to a biological wastewater treatment.

    摘要翻译： 本发明涉及一种处理在芳香族化合物硝化后的粗芳香族硝基化合物的净化中获得的废水的方法，其包括以下步骤：（a）粗芳族硝基化合物的单级或多级洗涤以获得 至少一个有机相和至少一个水相，以及水相或水相的除去，步骤（a）包括加入除氨以外的碱，然后（b）任选从其中除去有机成分 步骤（a）中获得的水相或水相的至少一部分通过汽提，优选用蒸汽，然后（c）从步骤（a）或（a）或（c）产生的水相或水相的至少一部分去除有机化合物， 步骤（b）通过热和/或氧化降解，然后（d）从步骤（c）产生的水相或水相的至少一部分蒸馏出氨，然后（e）可选地提供 将由步骤（d）得到的水相的一部分转化为生物废水处理。