公开(公告)号：US20110092748A1

公开(公告)日：2011-04-21

申请号：US12879824

申请日：2010-09-10

Applicant: Mahesh Sawant ,  Daniel M. Trauth ,  John G. Pendergast, JR.

Inventor： Mahesh Sawant ,  Daniel M. Trauth ,  John G. Pendergast, JR.

IPC: C07C201/16 ,  F28D21/00

CPC classification number: C07C201/06 ,  B01J10/00 ,  B01J19/00 ,  C07C201/08 ,  C07C201/16 ,  C07C205/02

Abstract: Disclosed are a process and an apparatus for synthesizing nitroalkanes by reaction of a hydrocarbon feedstock with aqueous nitric acid. Energy and capital costs may be reduced by recycling a majority of the aqueous phase back to the reactor.

Abstract translation: 公开了通过烃原料与硝酸水溶液反应来合成硝基烷烃的方法和装置。 通过将大部分水相回收到反应器中，可以减少能源和资本成本。

公开(公告)号：US20090043135A1

公开(公告)日：2009-02-12

申请号：US12280176

申请日：2007-03-06

Applicant: Ulrich Penzel ,  Rudiger Fritz ,  Holger Allardt ,  Johannes Adam ,  Anne-Kathrin Merten

Inventor： Ulrich Penzel ,  Rudiger Fritz ,  Holger Allardt ,  Johannes Adam ,  Anne-Kathrin Merten

IPC: C07C201/16

CPC classification number: B01D3/38 ,  C07C201/16 ,  C07C205/06

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20070088183A1

公开(公告)日：2007-04-19

申请号：US11581523

申请日：2006-10-16

Applicant: Heinrich Hermann ,  Jurgen Gebauer ,  Peter Konieczny ,  Mirko Handel

Inventor： Heinrich Hermann ,  Jurgen Gebauer ,  Peter Konieczny ,  Mirko Handel

IPC: C07C205/06

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

Abstract: The invention relates to a process for removing and recovering nitrating acid mixtures, in particular nitric acid, sulphuric acid and oxides of nitrogen, from the nitrated crude products occurring in the nitration of nitratable aromatic compounds after the nitrating acid has been separated off, by acidic scrubbing by means of a multistage extraction process, the extraction process comprising a cross-flow extraction with downstream countercurrent extraction. The process permits essentially complete recovery of the abovementioned acids, including the oxides of nitrogen, in high concentrations, so that they can be recycled to the nitration and no longer pollute the wastewater.

Abstract translation: 本发明涉及一种从硝化酸分离后硝化酸性混合物，特别是硝酸，硫酸和氮氧化物的硝化粗产物硝化硝酸化硝酸的硝化产物中除去和回收的方法。 通过多级提取方法进行洗涤，提取方法包括具有下游逆流提取的交叉流提取。 该方法允许基本上完全回收上述酸，包括高浓度的氮氧化物，使得它们可以再循环到硝化中，并且不再污染废水。

公开(公告)号：US06984762B2

公开(公告)日：2006-01-10

申请号：US10780266

申请日：2004-02-17

Applicant: Erwin Dieterich ,  Anke Hielscher ,  Berthold Keggenhoff ,  Manfred Keller-Killewald ,  Jürgen Münnig ,  Dietmar Wastian

Inventor： Erwin Dieterich ,  Anke Hielscher ,  Berthold Keggenhoff ,  Manfred Keller-Killewald ,  Jürgen Münnig ,  Dietmar Wastian

IPC: C07C205/00

CPC classification number: C07C201/16 ,  C07C201/08 ,  C07C205/06

Abstract: The invention relates to a process for the production of dinitrotoluene by the two-stage nitration of toluene. In the first stage of this process, toluene was reacted adiabatically with nitrating acid so that at least 90% of the toluene was reacted off and no more than 70% of the toluene formed dinitrotoluene. The resulting organic phase containing mononitrotoluene and the aqueous acid phase containing sulfuric acid were separated, and the aqueous acid phase containing sulfuric acid was concentrated by flash evaporation. The resulting concentrated sulfuric acid was recycled into the reaction in the first stage, and/or into the reaction in the second stage, and/or into the concentration in the second stage.In the second stage, the organic phase containing mononitrotoluene from the first stage was completely reacted isothermally with nitrating acid. The organic phase and the aqueous acid phase containing sulfuric acid were then separated, and the aqueous acid phase containing sulfuric acid was concentrated by vacuum evaporation. The resulting concentrated sulfuric acid was recycled into the reaction in the first stage and/or the second stage.

Abstract translation: 本发明涉及通过甲苯二段硝化生产二硝基甲苯的方法。 在该方法的第一阶段，将甲苯与硝酸进行绝热反应，使得甲苯的至少90％反应，并且不超过70％的甲苯形成二硝基甲苯。 分离含有单硝基甲苯和含硫酸水相的所得有机相，通过闪蒸浓缩含硫酸水相。 将所得浓硫酸在第一阶段循环进入反应，和/或在第二阶段进入反应，和/或在第二阶段中浓缩。 在第二阶段，含有来自第一阶段的一硝基甲苯的有机相与硝酸一起等温共同反应。 然后分离含有硫酸的有机相和含水酸相，真空蒸发浓缩含硫酸的酸水溶液。 所得浓硫酸在第一阶段和/或第二阶段循环进入反应。

公开(公告)号：US20050224424A1

公开(公告)日：2005-10-13

申请号：US11101261

申请日：2005-04-07

Applicant: Thomas Knauf ,  Franz-Ulrich Von Gehlen ,  Wolfgang Dohmen ,  Jorg Schmiedler

Inventor： Thomas Knauf ,  Franz-Ulrich Von Gehlen ,  Wolfgang Dohmen ,  Jorg Schmiedler

IPC: C02F1/00 ,  C02F1/02 ,  C02F1/04 ,  C02F1/20 ,  C02F1/40 ,  C02F1/66 ,  C02F9/00 ,  C07C201/16 ,  C02F1/58

CPC classification number: C02F1/025 ,  C02F1/02 ,  C02F1/20 ,  C02F1/40 ,  C02F1/66 ,  C02F9/00 ,  C02F2001/007 ,  C02F2101/322 ,  C02F2101/38 ,  C02F2103/18 ,  C02F2301/066 ,  C07C201/16 ,  Y10S210/909 ,  Y10S210/919 ,  C07C205/06

Abstract: Alkaline waste waters formed in the washing of crude nitrobenzene which has been prepared by the adiabatic nitration of benzene with nitrating acid, washed in an acidic washing process, and then washed in an alkaline washing process are treated. The alkaline waste water being treated generally contains benzene in a concentration of from about 100 to about 3000 ppm and nitrobenzene in a concentration of from about 1000 to about 10,000 ppm. In the process of the present invention, undissolved benzene and/or nitrobenzene are separated from the alkaline waste water, residual benzene and/or nitrobenzene is/are then optionally stripped out of the alkaline waste water, and the alkaline waste water from which benzene and/or nitrobenzene has been removed is heated to a temperature of from 150 to 500° C. under excess pressure with the exclusion of oxygen.

Abstract translation: 通过用硝酸将绝热硝化苯，在酸性洗涤过程中洗涤，然后在碱性洗涤过程中洗涤而制备的粗硝基苯洗涤中形成的碱性废水被处理。 被处理的碱性废水通常含有浓度为约100至约3000ppm的苯和浓度为约1000至约10,000ppm的硝基苯。 在本发明的方法中，将未溶解的苯和/或硝基苯从碱性废水中分离出来，然后将残留的苯和/或硝基苯任选地从碱性废水中除去，将碱和/ /或硝基苯已被除去时，在过量压力下加热到150-500℃，排除氧气。

公开(公告)号：US20040267062A1

公开(公告)日：2004-12-30

申请号：US10878079

申请日：2004-06-28

Inventor： Jurgen Munnig ,  Dietmar Wastian ,  Wolfgang Lorenz ,  Berthold Keggenhoff

IPC: C07C25/06

CPC classification number: C02F1/26 ,  C02F1/66 ,  C02F9/00 ,  C02F2103/36 ,  C07C201/16 ,  C07C205/06

Abstract: The present invention relates to a process for working up organic secondary components which are formed in the one-stage or two-stage nitration of toluene to dinitrotoluene. These organic secondary components are present in the acidic and alkaline waste water from the dinitrotoluene washing step and in the aqueous distillate from the sulfuric acid concentration step, together with small amounts of mononitrotoluene and dinitrotoluene. This process comprises a) combining the acidic and alkaline waste waters from the washing step and the aqueous distillate from the sulfuric acid concentration step such that the resulting mixture has a pH below 5, b) separating the aqueous and organic phases which form by phase separation, and c) recycling the organic phase from step b) into the nitration process.

Abstract translation: 本发明涉及一种处理甲苯一硝基甲苯硝化成二硝基甲苯形成有机二次成分的方法。 这些有机次要组分存在于来自二硝基甲苯洗涤步骤的酸性和碱性废水中以及来自硫酸浓缩步骤的含水馏出物中，以及少量的一硝基甲苯和二硝基甲苯。 该方法包括：a）从硫酸浓缩步骤中将洗涤步骤的酸性和碱性废水与含水馏出物混合，使得所得混合物的pH值低于5，b）分离通过相分离形成的水相和有机相 ，和c）将来自步骤b）的有机相再循环到硝化过程中。

公开(公告)号：US06673942B1

公开(公告)日：2004-01-06

申请号：US10181411

申请日：2002-07-23

Applicant: Matthias Kottenhahn ,  Guenter Knaup ,  Karlheinz Drauz ,  Meir Lahav ,  David Zbaida

Inventor： Matthias Kottenhahn ,  Guenter Knaup ,  Karlheinz Drauz ,  Meir Lahav ,  David Zbaida

IPC: C07D23390

CPC classification number: C07D233/64 ,  C07B57/00 ,  C07B2200/07 ,  C07C201/16 ,  C07C227/34 ,  C07C231/20 ,  C07C319/28 ,  C07C229/08 ,  C07C229/22 ,  C07C229/24 ,  C07C237/06 ,  C07C323/58 ,  C07C205/57

Abstract: The present invention relates to a process for the resolution of DL-racemic mixtures of compounds which crystalize in the form of a conglumerate. Both, the D and L-enantiomers are obtained according to the invention in a industrially feasable process by adding chiral enantioselective polymers to the supersaturated solution of the racemat to inhibit crystalization of one enantiomer. Next a DL-racemic mixture of said compound is suspended in about twice the amount of the crystallized enantiomer. Consequently, the opposite enantiomer could be recovered by said suspension by physical separation.

Abstract translation: 本发明涉及一种分解化合物的DL-外消旋混合物的方法，所述化合物以共聚物的形式结晶。 根据本发明，在工业上可行的方法中，D和L-对映异构体都是通过向消旋体的过饱和溶液中加入手性对映选择性聚合物以抑制一种对映异构体的结晶而获得的。 接下来将所述化合物的DL-外消旋混合物悬浮在约两倍量的结晶对映异构体中。 因此，相反的对映异构体可以通过物理分离由所述悬浮液回收。

公开(公告)号：US5877353A

公开(公告)日：1999-03-02

申请号：US7612

申请日：1998-01-15

Applicant: Jurg Bruhin

Inventor： Jurg Bruhin

IPC: C07B63/04 ,  C07C45/46 ,  C07C45/67 ,  C07C45/81 ,  C07C45/86 ,  C07C49/84 ,  C07C201/12 ,  C07C205/45

CPC classification number: C07C205/45 ,  C07C201/08 ,  C07C201/12 ,  C07C201/16 ,  C07C45/46 ,  C07C45/673 ,  C07C45/81

Abstract: The present invention relates to a process for the preparation of benzophenone derivatives and comprises a selective crystallization of alkali salts of compounds of formula (I) ##STR1## wherein R.sup.1 is lower-alkyl and R.sup.2 is hydrogen, lower-alkyl or halogen,from the isomeric alkali salts of the 3-hydroxy compounds of formula (II), ##STR2## wherein R.sup.1 and R.sup.2 are as defined above.

Abstract translation: 本发明涉及一种制备二苯甲酮衍生物的方法，包括式（I）化合物的碱金属盐的选择性结晶，其中R 1是低级烷基，R 2是氢，低级烷基或卤素， 式（II）的3-羟基化合物的异构碱式盐，其中R 1和R 2如上所定义。

公开(公告)号：US5820764A

公开(公告)日：1998-10-13

申请号：US959731

申请日：1997-10-28

Applicant: Faouzi Joulak ,  Louis Le Bris ,  Philippe Marion

Inventor： Faouzi Joulak ,  Louis Le Bris ,  Philippe Marion

IPC: C02F1/66 ,  C02F9/00 ,  C07C201/16 ,  C02F1/52

CPC classification number: C02F1/66 ,  C07C201/16 ,  C02F2103/36 ,  Y10S210/909

Abstract: Objectionable byproduct aqueous effluents containing contaminating amounts of hydroxynitroaromatic compounds, in particular those aqueous effluents produced during the synthesis of nitroaromatic compounds, e.g., dinitrotoluenes, via reaction of an aromatic compound with nitric acid in the presence of sulfuric acid, are efficiently, facilely and economically treated/removed by (a) intimately contacting a mixture of at least one nitroaromatic compound and at least one hydroxynitroaromatic compound with an aqueous wash medium containing a neutralizing agent, (b) separating the resulting admixture into an organic phase and an aqueous phase, (c) recycling a fraction of the separated aqueous phase to the aqueous wash medium to thus constitute a portion thereof, and (d) periodically draining a fraction of the wash medium, whether to destruction thereof or to waste.

Abstract translation: 含有污染量的羟基硝基芳族化合物的有害副产物含水废水，特别是在硫酸存在下通过芳族化合物与硝酸的反应合成硝基芳族化合物（例如二硝基甲苯）期间产生的含水废水，是有效，便利和经济的 通过（a）使至少一种硝基芳族化合物和至少一种羟基硝基芳族化合物的混合物与含有中和剂的水性洗涤介质紧密接触来处理/除去，（b）将所得混合物分离成有机相和水相（ c）将分离的水相的一部分循环到水性洗涤介质中，从而构成其一部分，和（d）定期排出洗涤介质的一部分，不管其是否破坏或浪费。

公开(公告)号：US5395995A

公开(公告)日：1995-03-07

申请号：US059783

申请日：1993-05-10

Applicant: Dieter Grenner ,  Thomas Schieb ,  Gerhard Wiechers

Inventor： Dieter Grenner ,  Thomas Schieb ,  Gerhard Wiechers

IPC: C07C201/08 ,  C07C201/16 ,  C07C205/06

CPC classification number: C07C201/16 ,  C07C201/08

Abstract: A process for the preparation and purification of nitroaromatics by nitration of the corresponding aromatics and subsequent melt crystallization. The residual melts which occur are recycled.

Abstract translation: 通过硝化相应的芳族化合物和随后的熔融结晶来制备和纯化硝基芳族化合物的方法。 发生的残余熔体被回收。