PROCESS FOR PURIFYING WASTEWATERS FROM THE WORKUP OF CRUDE AROMATIC NITRO COMPOUNDS
    3.
    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

    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。