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1.发明授权Process for distillatively removing dinitrotoluene from process wastewater from the preparation of dinitrotoluene by nitrating of toluene with nitrating acid 失效通过用硝酸将硝酸甲苯硝化制备二硝基甲苯从工艺废水中蒸馏除去二硝基甲苯的方法公开(公告)号：US07928270B2
公开(公告)日：2011-04-19
申请号：US12280176
申请日：2007-03-06
IPC分类号： C07C205/00
CPC分类号： B01D3/38 , C07C201/16 , C07C205/06
摘要： A process is proposed for distillatively removing dinitrotoluene from process wastewater from the preparation of dinitrotoluene by nitrating toluene with nitrating acid, which comprises basifying the process wastewater to a pH of >8.5, feeding it to a stripping column in the upper region thereof and stripping it with steam in countercurrent to obtain a vapor stream laden with dinitrotoluene and a bottom stream depleted in dinitrotoluene compared to the process wastewater used.
摘要翻译： 提出了一种从硝化硝酸硝化甲苯制备二硝基甲苯中的二硝基甲苯蒸馏除去二硝基甲苯的方法，其中包括将工艺废水碱化至pH值> 8.5，将其送入其上部区域的汽提塔并将其汽提 与所用的工艺废水相比，蒸汽以逆流方式获得装载有二硝基甲苯的蒸气流和二硝基甲苯消耗的底部流。
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公开(公告)号：US20120248038A1
公开(公告)日：2012-10-04
申请号：US13516280
申请日：2010-12-13
申请人： Ruediger Fritz , Renate Hempel , Baerbel Guschel , Helmut Richter , Anne-Kathrin Merten , Michael Zoellinger , Elvira Flegel , Holger Allardt , Reiner Reetz
发明人： Ruediger Fritz , Renate Hempel , Baerbel Guschel , Helmut Richter , Anne-Kathrin Merten , Michael Zoellinger , Elvira Flegel , Holger Allardt , Reiner Reetz
CPC分类号： C07C201/16 , C02F1/26 , C02F1/66 , C02F2103/36 , C07C205/06 , C07C205/12
摘要： A process for working up alkaline process wastewater from the nitration of aromatic compounds to mono-, di- and trinitroaromatics with a pH of 7.5 to 13 or a mixture W with a pH of 6 to 10 of alkaline process wastewater and the aqueous distillate of the sulfuric acid concentration, comprising the steps of a) acidifying the alkaline process wastewater or the mixture W 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 2, which forms a mixture A consisting of organic phase which separates out and acidic aqueous phase, and b) extracting the mixture A with an aromatic extractant.
摘要翻译： 用于将碱性工艺废水从硝化芳香族化合物转化为pH为7.5至13的单，二和三硝基溴化物或碱性工艺废水的pH为6至10的混合物W和碱性工艺废水的含水馏出物 硫酸浓度，包括以下步骤：a）通过将从硝化中获得的含水硫酸相的后处理产生的浓硫酸加入到低于2的pH下，使碱性工艺废水或混合物W酸化，形成 由分离出酸性水相的有机相组成的混合物A，和b）用芳族萃取剂萃取混合物A.
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公开(公告)号：US20120197047A1
公开(公告)日：2012-08-02
申请号：US13362607
申请日：2012-01-31
申请人： Holger ALLARDT , Andreas RAICHLE , Reiner REETZ , Johannes BÜTTNER , Michael ZÖLLINGER , Stefanie HAASE , Rüdiger FRITZ
发明人： Holger ALLARDT , Andreas RAICHLE , Reiner REETZ , Johannes BÜTTNER , Michael ZÖLLINGER , Stefanie HAASE , Rüdiger FRITZ
IPC分类号： C07C201/12 , B01J47/00
CPC分类号： B01J39/02 , B01J39/05 , B01J47/026 , B01J49/06 , B01J49/60 , B01J2220/56 , C07C201/16 , C07C205/06
摘要： Precipitations of nitrohydroxyaromatic salts out of the nitrated crude products obtained in the nitration of aromatic compounds after alkaline scrubbing, for example mononitrotoluenes, are prevented by contacting the nitrated crude products with an acidic ion exchanger. The nitrated crude products are preferably selected from a feedstream to a distillation column, a bottoms circulation stream of a distillation column and a feedstream to a vaporizer.
摘要翻译： 通过使硝化粗产物与酸性离子交换剂接触，可以防止碱性洗涤后芳族化合物硝化的硝化羟基芳族化合物的沉淀，例如单硝基甲苯。 硝化粗产物优选选自蒸馏塔的进料流，蒸馏塔的塔底循环流和蒸发器的进料流。
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公开(公告)号：US20110284391A1
公开(公告)日：2011-11-24
申请号：US13111337
申请日：2011-05-19
申请人： Rüdiger FRITZ , Stefanie Haase , Holger Allardt , Michael Zoellinger , Reiner Reetz , Hans-Juergen Friedrich
发明人： Rüdiger FRITZ , Stefanie Haase , Holger Allardt , Michael Zoellinger , Reiner Reetz , Hans-Juergen Friedrich
CPC分类号： C25B13/08 , C02F1/4672 , C02F1/725 , C02F2001/46147 , C02F2001/46157 , C02F2101/166 , C02F2101/322 , C02F2101/345 , C02F2101/38 , C02F2103/36 , C02F2201/46115 , C02F2201/46135 , C02F2201/4614 , C02F2201/4617 , C02F2201/4618 , C02F2209/02 , C25B9/08 , C25B11/0415 , C25B11/0447
摘要： The invention relates to a process for the electrochemical treatment of aromatic nitro compounds, which comprises the steps: introducing an aqueous composition comprising at least one aromatic nitro compound into the anode space of an electrolysis cell and carrying out an electrolysis at an anodic current density in the range from 0.1 to 10 kA/m2 and a cell potential in the range from 4 to 15 V.
摘要翻译： 本发明涉及芳族硝基化合物的电化学处理方法，其包括以下步骤：将包含至少一种芳族硝基化合物的含水组合物引入电解池的阳极空间，并以阳极电流密度进行电解 0.1〜10kA / m2的范围，电池电位在4〜15V的范围内。
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5.发明授权公开(公告)号：US09630866B2
公开(公告)日：2017-04-25
申请号：US13511256
申请日：2010-12-13
IPC分类号： C02F1/66 , C02F9/00 , C01B21/40 , C07C201/08 , C02F1/20 , C02F1/78 , C02F103/36
CPC分类号： C02F9/00 , C01B21/40 , C02F1/20 , C02F1/78 , C02F2103/36 , C02F2209/008 , C02F2209/02 , C02F2209/06 , C07C201/08 , C07C205/06
摘要： The present invention relates to a process for workup of nitrite-comprising alkaline process wastewaters from the nitration of aromatic compounds, wherein the alkaline process wastewater is acidified by addition of acids and the offgas which comprises nitrogen oxides and escapes from the acidified process wastewater is worked up, comprising the steps of a) acidifying the process wastewater by adding acid to a pH below 5, which forms an organic phase which separates out, an acidic aqueous phase and a gaseous NOx-containing phase, and b) removing the gaseous NOx-containing phase.
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公开(公告)号：US08637712B2
公开(公告)日：2014-01-28
申请号：US13362607
申请日：2012-01-31
申请人： Holger Allardt , Andreas Raichle , Reiner Reetz , Johannes Büttner , Michael Zöllinger , Stefanie Haase , Rüdiger Fritz
发明人： Holger Allardt , Andreas Raichle , Reiner Reetz , Johannes Büttner , Michael Zöllinger , Stefanie Haase , Rüdiger Fritz
IPC分类号： C07C205/20
CPC分类号： B01J39/02 , B01J39/05 , B01J47/026 , B01J49/06 , B01J49/60 , B01J2220/56 , C07C201/16 , C07C205/06
摘要： Precipitations of nitrohydroxyaromatic salts out of the nitrated crude products obtained in the nitration of aromatic compounds after alkaline scrubbing, for example mononitrotoluenes, are prevented by contacting the nitrated crude products with an acidic ion exchanger. The nitrated crude products are preferably selected from a feedstream to a distillation column, a bottoms circulation stream of a distillation column and a feedstream to a vaporizer.
摘要翻译： 通过使硝化粗产物与酸性离子交换剂接触，可以防止碱性洗涤后芳族化合物硝化的硝化羟基芳族化合物的沉淀，例如单硝基甲苯。 硝化粗产物优选选自蒸馏塔的进料流，蒸馏塔的塔底循环流和蒸发器的进料流。
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7.发明授权Method for extracting nitrocresols from waste water produced in the manufacture of mononitrotoluene and use of said extract 有权用于在制造单硝基甲苯中生产的废水中提取硝基甲酚的方法和所述提取物的使用公开(公告)号：US07449610B2
公开(公告)日：2008-11-11
申请号：US10573020
申请日：2004-09-18
IPC分类号： C07C205/06 , C02F1/26
CPC分类号： C02F1/26 , C02F2101/38 , C02F2103/36 , C07C201/16 , C07C205/06 , C07C205/22
摘要： The invention provides a process for removing nitrocresols from wastewater of mononitrotoluene preparation, which comprises acidifying the alkaline wastewater of mononitrotoluene preparation with acids to a pH of at most 3 and treating the nitrocresols with an extractant.The invention further provides the preparation of dinitrotoluene by use of the nitrocresol-containing extracts as a feedstock.
摘要翻译： 本发明提供从一硝基甲苯制备废水中除去硝基甲酚的方法，该方法包括用酸将碱性废水酸化至pH为3以下，用萃取剂处理硝基甲酚。 本发明还提供了通过使用含有硝基甲酚的提取物作为原料制备二硝基甲苯。
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公开(公告)号：US08529771B2
公开(公告)日：2013-09-10
申请号：US13514648
申请日：2010-12-13
申请人： Ruediger Fritz , Renate Hempel , Michael Zoellinger , Anne-Kathrin Merten , Doris Zschieschang , Ina Homann , Annett Gersdorf , Holger Allardt , Reiner Reetz , Elvira Flegel
发明人： Ruediger Fritz , Renate Hempel , Michael Zoellinger , Anne-Kathrin Merten , Doris Zschieschang , Ina Homann , Annett Gersdorf , Holger Allardt , Reiner Reetz , Elvira Flegel
CPC分类号： C07C201/16 , C07C205/06 , C07C205/12
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US20120234773A1
公开(公告)日：2012-09-20
申请号：US13514648
申请日：2010-12-13
申请人： Ruediger Fritz , Renate Hempel , Michael Zoellinger , Anne-Kathrin Merten , Doris Zschieschang , Ina Homann , Annett Gersdorf , Holger Allardt , Reiner Reetz , Elvira Flegel
发明人： Ruediger Fritz , Renate Hempel , Michael Zoellinger , Anne-Kathrin Merten , Doris Zschieschang , Ina Homann , Annett Gersdorf , Holger Allardt , Reiner Reetz , Elvira Flegel
CPC分类号： C07C201/16 , C07C205/06 , C07C205/12
摘要： 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.
摘要翻译： 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。
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10.发明申请公开(公告)号：US20120228218A1
公开(公告)日：2012-09-13
申请号：US13511256
申请日：2010-12-13
IPC分类号： C02F1/20 , C02F9/14 , C02F1/26 , C02F101/16
CPC分类号： C02F9/00 , C01B21/40 , C02F1/20 , C02F1/78 , C02F2103/36 , C02F2209/008 , C02F2209/02 , C02F2209/06 , C07C201/08 , C07C205/06
摘要： The present invention relates to a process for workup of nitrite-comprising alkaline process wastewaters from the nitration of aromatic compounds, wherein the alkaline process wastewater is acidified by addition of acids and the offgas which comprises nitrogen oxides and escapes from the acidified process wastewater is worked up, comprising the steps of a) acidifying the process wastewater by adding acid to a pH below 5, which forms an organic phase which separates out, an acidic aqueous phase and a gaseous NOx-containing phase, and b) removing the gaseous NOx-containing phase.
摘要翻译： 本发明涉及一种用于处理来自硝化芳族化合物的亚硝酸盐碱性工艺废水的方法，其中碱性工艺废水通过加入酸而被酸化，并且包括氮氧化物和从酸化过程废水逸出的废气被加工 包括以下步骤：a）通过将酸加入到低于5的pH酸化所述工艺废水，所述pH低于5，其形成分离出的有机相，酸性水相和含NO x的气态相，以及b）除去所述NOx- 含有相。
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