公开(公告)号：US08529771B2

公开(公告)日：2013-09-10

申请号：US13514648

申请日：2010-12-13

Applicant: Ruediger Fritz ,  Renate Hempel ,  Michael Zoellinger ,  Anne-Kathrin Merten ,  Doris Zschieschang ,  Ina Homann ,  Annett Gersdorf ,  Holger Allardt ,  Reiner Reetz ,  Elvira Flegel

Inventor： Ruediger Fritz ,  Renate Hempel ,  Michael Zoellinger ,  Anne-Kathrin Merten ,  Doris Zschieschang ,  Ina Homann ,  Annett Gersdorf ,  Holger Allardt ,  Reiner Reetz ,  Elvira Flegel

IPC: C02F1/20 ,  C02F3/00 ,  C02F9/00 ,  C02F1/68

CPC classification number: C07C201/16 ,  C07C205/06 ,  C07C205/12

Abstract: A process for working up alkaline process wastewater from the nitration of aromatic compounds to mono-, di- and trinitroaromatics, said alkaline process wastewater having a pH of 7.5 to 13, comprising the steps of a) acidifying the alkaline process wastewater by adding concentrated sulfuric acid which originates from the workup of the aqueous, sulfuric acid-containing phase obtained in the nitration to a pH below 5, which forms a mixture A consisting of organic phase which separates out and acidic aqueous phase, b) contacting the mixture A with fresh sewage sludge, and c) removing the sewage sludge.

Abstract translation: 所述碱性工艺废水的pH为7.5至13，包括以下步骤：a）通过加入浓硫酸来酸化碱性工艺废水，所述方法是将芳香族化合物硝化为单，二和三硝基芳烃的碱性工艺废水 酸，其来源于在硝化中获得的含水硫酸相的pH值低于5，其形成由分离出酸性水相的有机相组成的混合物A，b）将混合物A与新鲜的 污水污泥，以及c）清除污水污泥。

公开(公告)号：US20120234773A1

公开(公告)日：2012-09-20

申请号：US13514648

申请日：2010-12-13

Applicant: Ruediger Fritz ,  Renate Hempel ,  Michael Zoellinger ,  Anne-Kathrin Merten ,  Doris Zschieschang ,  Ina Homann ,  Annett Gersdorf ,  Holger Allardt ,  Reiner Reetz ,  Elvira Flegel

Inventor： Ruediger Fritz ,  Renate Hempel ,  Michael Zoellinger ,  Anne-Kathrin Merten ,  Doris Zschieschang ,  Ina Homann ,  Annett Gersdorf ,  Holger Allardt ,  Reiner Reetz ,  Elvira Flegel

IPC: C02F1/68 ,  C02F1/20

CPC classification number: C07C201/16 ,  C07C205/06 ,  C07C205/12

Abstract: A process for working up alkaline process wastewater from the nitration of aromatic compounds to mono-, di- and trinitroaromatics, said alkaline process wastewater having a pH of 7.5 to 13, comprising the steps of a) acidifying the alkaline process wastewater by adding concentrated sulfuric acid which originates from the workup of the aqueous, sulfuric acid-containing phase obtained in the nitration to a pH below 5, which forms a mixture A consisting of organic phase which separates out and acidic aqueous phase, b) contacting the mixture A with fresh sewage sludge, and c) removing the sewage sludge.

Abstract translation: 所述碱性工艺废水的pH为7.5至13，包括以下步骤：a）通过加入浓硫酸来酸化碱性工艺废水，所述方法是将芳香族化合物硝化为单，二和三硝基芳烃的碱性工艺废水 酸，其来源于在硝化中获得的含水硫酸相的pH值低于5，其形成由分离出酸性水相的有机相组成的混合物A，b）将混合物A与新鲜的 污水污泥，以及c）清除污水污泥。