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    VERFAHREN ZUR SAUREN WÄSCHE VON DINITROTOLUOL IN GEGENWART VON BLAUSÄURE
    7.
    发明公开
    VERFAHREN ZUR SAUREN WÄSCHE VON DINITROTOLUOL IN GEGENWART VON BLAUSÄURE 有权
    VERFAHREN ZUR SAURENWÄSCHEVON DINITROTOLUOL在GEGENWART VONBLAUSÄURE

    公开(公告)号：EP3060543A1

    公开(公告)日：2016-08-31

    申请号：EP14786934.1

    申请日：2014-10-22

    申请人： BASF SE ,  Josef Meissner GmbH & Co. KG

    发明人： NETO, Samuel ,  FRITZ, Rüdiger ,  HEMPEL, Renate ,  ALLARDT, Holger ,  DAI, Yuanshen ,  BECKER, Barbara ,  AHRENS, Sebastian ,  LESCHINSKI, Julia ,  HERMANN, Heinrich ,  HÄNDEL, Mirko ,  PÖHLMANN, Jürgen

    IPC分类号： C07C201/16 ,  C07C205/06

    CPC分类号： C07C201/16 ,  B01D11/0488 ,  B01D11/0492 ,  B01D2011/002 ,  C02F1/20 ,  C02F1/26 ,  C02F3/00 ,  C02F2101/18 ,  C02F2103/36 ,  C07C205/06

    摘要： A process for scrubbing a crude mixture which is obtained in the nitration of toluene after separating off the nitrating acid and comprises dinitrotoluene, nitric acid, nitrogen oxides and sulfuric acid, which comprises two scrubbing steps (WS-I) and (WS II), wherein i) in a first scrubbing step (WS-I), the crude mixture is extracted with a scrubbing acid I comprising nitric acid, nitrogen oxides and sulfuric acid in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (WS-I-1) of the first scrubbing step (WS-I) has a total acid content of from 10 to 40% by weight and a content of from 80 to 350 ppm of hydrocyanic acid, giving a prescrubbed crude mixture, ii) in a second scrubbing step (WS-II), the prescrubbed crude mixture comprising dinitrotoluene is extracted with a scrubbing acid II in a scrub comprising at least one, preferably at least 2, extraction stage(s), where the scrubbing acid discharged from the first extraction stage (WS-II-1) of the second scrubbing step (WS-II) has a pH of less than or equal to 4, giving a dinitrotoluene-comprising mixture which is essentially free of nitric acid, sulfuric acid, nitrogen oxides and hydrocyanic acid and has a content of not more than 300 ppm of nitric acid and nitrogen oxides, not more than 3 ppm of sulfate and not more than 50 ppm of hydrocyanic acid.

    摘要翻译： 分离出硝化酸后硝酸甲苯中得到的粗混合物的方法，包括二硝基甲苯，硝酸，氮氧化物和硫酸，其包括两个洗涤步骤（WS-I）和（WS-II） 其中i）在第一洗涤步骤（WS-1）中，所述粗混合物在包含至少一个萃取阶段的洗涤中用包含硝酸，氮氧化物和硫酸的洗涤酸I萃取，其中洗涤酸从 第一洗涤步骤（WS-1）的第一提取阶段（WS-I-1）的总酸含量为10至40重量％，含量为80至350ppm的氢氰酸，得到预先混合的粗品 混合物，ii）在第二次洗涤步骤（WS-II）中，包含二硝基甲苯的预混合粗混合物在洗涤中用洗涤酸II萃取，所述洗涤包括至少一个，优选至少2个萃取阶段，其中洗涤 酸从第一次提取出来 在第二洗涤步骤（WS-II）的阶段（WS-II-1）具有小于或等于4的pH，得到基本上不含硝酸，硫酸，氮氧化物的二硝基甲苯混合物， 氢氰酸，硝酸和氮氧化物含量不超过300ppm，硫酸盐不超过3ppm，氢氰酸不大于50ppm。

    SAURE SCHLAMMADSORPTION VON DNT-ABWÄSSERN
    8.
    发明公开
    SAURE SCHLAMMADSORPTION VON DNT-ABWÄSSERN 有权

    公开(公告)号：EP2513034A1

    公开(公告)日：2012-10-24

    申请号：EP10788085.8

    申请日：2010-12-13

    申请人： BASF SE

    发明人： FRITZ, Rüdiger ,  HEMPEL, Renate ,  ZÖLLINGER, Michael ,  MERTEN, Anne-Kathrin ,  ZSCHIESCHANG, Doris ,  HOMANN, Ina ,  GERSDORF, Annett ,  ALLARDT, Holger ,  REETZ, Reiner ,  FLEGEL, Elvira

    IPC分类号： C07C201/08 ,  C07C205/06 ,  C07C205/12

    CPC分类号： C07C201/16 ,  C07C205/06 ,  C07C205/12

    摘要： The invention relates to a method for treating alkaline process waste water from the nitration of aromatic compounds to mono-, di- and trinitroaromatic compounds having a pH value of 7.5 to 13, comprising the steps of a) acidifying the alkaline process waste water by adding concentrated sulfuric acid, which originates from the treatment of the aqueous phase comprising sulfuric acid occurring during nitration, to a pH value below 5, wherein a mixture A is created from a separating organic phase and acidic aqueous phase, b) bringing the mixture A into contact with fresh sludge and c) separating the sludge.

    摘要翻译： 本发明涉及一种处理来自芳族化合物硝化成pH值为7.5-13的单，二和三硝基芳族化合物的碱性工艺废水的方法，该方法包括以下步骤：a）通过加入碱性工艺废水 将来自硝化期间发生的包含硫酸的水相的处理的浓硫酸浓缩至pH值低于5，其中由分离的有机相和酸性水相生成混合物A，b）使混合物A进入 接触新鲜污泥和c）分离污泥。