公开(公告)号：US20170174612A1

公开(公告)日：2017-06-22

申请号：US15320804

申请日：2015-06-22

Applicant: Covestro Deutschland AG

Inventor： Thomas Knauf ,  Peter Drinda

IPC: C07C201/08 ,  B01J19/24 ,  C07C201/16

CPC classification number: C07C201/08 ,  B01J19/0006 ,  B01J19/002 ,  B01J19/1881 ,  B01J19/24 ,  B01J19/2465 ,  B01J2219/00006 ,  B01J2219/0004 ,  B01J2219/00268 ,  C07C201/16 ,  C07C205/06

Abstract: The present invention relates to a process for the continuous production of nitrobenzene by the nitration of benzene with nitric acid and sulphuric acid under adiabatic conditions, not the entire production plant being shut down during a production stop, but the production plant being entirely or at least partly operated in recirculation mode. The invention further relates to a plant for producing nitrobenzene and to a method for operating a plant for producing nitrobenzene.

公开(公告)号：US20170174603A1

公开(公告)日：2017-06-22

申请号：US15311951

申请日：2015-05-18

Applicant: BASF SE

Inventor： Andreas PLETSCH ,  Nicole HOLUB ,  Thomas ULRICH ,  Petr KVITA ,  Laurent CAVIN

IPC: C07C51/353 ,  C07C37/76 ,  C07C67/00 ,  C07C209/36 ,  C07C201/08 ,  C07C51/00 ,  C07C37/045 ,  C07C241/02

CPC classification number: C07C51/353 ,  C07C37/045 ,  C07C37/76 ,  C07C51/00 ,  C07C51/15 ,  C07C51/367 ,  C07C67/00 ,  C07C201/08 ,  C07C209/365 ,  C07C241/02 ,  C07C39/30 ,  C07C65/05 ,  C07C65/21

Abstract: The present invention relates to a process for reacting chemical compounds comprising the step of reacting a compound of formula (IV) wherein Hal is independently selected from CI or Br, and X″ is a monovalent anion, in the presence of an inorganic acid, wherein the aqueous inorganic acid has a concentration of at least about 60%, at a temperature of about 140° C. to Cabout 250° C., to obtain a compound of formula (V) wherein Hal is as defined above.

公开(公告)号：US09630866B2

公开(公告)日：2017-04-25

申请号：US13511256

申请日：2010-12-13

Applicant: Ruediger Fritz ,  Renate Hempel ,  Michael Zoellinger ,  Holger Allardt ,  Reiner Reetz

Inventor： Ruediger Fritz ,  Renate Hempel ,  Michael Zoellinger ,  Holger Allardt ,  Reiner Reetz

IPC: C02F1/66 ,  C02F9/00 ,  C01B21/40 ,  C07C201/08 ,  C02F1/20 ,  C02F1/78 ,  C02F103/36

CPC classification number: C02F9/00 ,  C01B21/40 ,  C02F1/20 ,  C02F1/78 ,  C02F2103/36 ,  C02F2209/008 ,  C02F2209/02 ,  C02F2209/06 ,  C07C201/08 ,  C07C205/06

Abstract: 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.

公开(公告)号：US09527801B2

公开(公告)日：2016-12-27

申请号：US14978556

申请日：2015-12-22

Applicant: Zhejiang Rongyao Biotech CO., LTD.

Inventor： Rener Chen ,  Fei Shi ,  Jianhua Chen ,  Na Zhang

IPC: C07C231/02 ,  C07C201/08 ,  C07C201/12 ,  B01J19/18 ,  C01B17/94

CPC classification number: C07C231/02 ,  C01B17/94 ,  C07C201/08 ,  C07C201/12 ,  C07C205/57

Abstract: A process and a device for recycling waste acid produced in the process of producing Zoalene. The process comprises steps: heating, depressurizing and distilling the waste acid recycled after nitration reaction; collecting acid liquid A and distilled water A; mixing the acid liquid A with new concentrated sulfuric acid in proportion, and putting the mixture to a new Zoalene nitration reaction process; and putting the distilled water A into a diluting pot for diluting the liquid produced in the nitration reaction. The waste acid produced in the process of producing Zoalene is recycled and not directly discharged; water resources are recycled, waste of the water resources is reduced, and discharge of waste water produced in the process of producing Zoalene is greatly reduced, so that not only production cost is saved, but also environment pressure is reduced.

Abstract translation: 用于回收在生产Zoalene过程中产生的废酸的方法和装置。 该方法包括以下步骤：对硝化反应后再循环的废酸进行加热，减压和蒸馏; 收集酸性液体A和蒸馏水A; 将酸性液体A与新的浓硫酸成比例混合，并将混合物置于新的Zoalene硝化反应过程中; 并将蒸馏水A放入用于稀释硝化反应中产生的液体的稀释罐中。 在生产Zoalene过程中产生的废酸被回收利用，不能直接排放; 水资源循环利用，水资源浪费减少，生产Zoalene过程中产生的废水排放量大大减少，不仅节省了生产成本，而且降低了环境压力。

公开(公告)号：US09504933B2

公开(公告)日：2016-11-29

申请号：US13973142

申请日：2013-08-22

Applicant: ANGUS Chemical Company

Inventor： Mahesh Sawant ,  Daniel M. Trauth ,  John G. Pendergast, Jr. ,  Ravindra S. Dixit

IPC: B01J19/00 ,  B01J19/24 ,  B01D3/00 ,  C07C201/00 ,  C07C201/06 ,  C07C201/08 ,  C07C205/00 ,  C07C205/01 ,  C07C205/02 ,  C07C205/05

CPC classification number: B01D3/009 ,  B01J2219/00006 ,  C07C201/08 ,  C07C205/02 ,  C07C205/05

Abstract: Disclosed is an apparatus for synthesizing nitroalkanes by reaction of a hydrocarbon feedstock with aqueous nitric acid. The apparatus may be designed such that it can synthesize more than one nitroalkane using the same equipment.

公开(公告)号：US20160185711A1

公开(公告)日：2016-06-30

申请号：US14978556

申请日：2015-12-22

Applicant: Zhejiang Rongyao Biotech CO., LTD.

Inventor： RENER CHEN ,  FEI SHI ,  JIANHUA CHEN ,  NA ZHANG

IPC: C07C231/02 ,  B01J19/18 ,  C07C201/08 ,  C01B17/94 ,  C07C201/12

CPC classification number: C07C231/02 ,  C01B17/94 ,  C07C201/08 ,  C07C201/12 ,  C07C205/57

Abstract: A process and a device for recycling waste acid produced in the process of producing Zoalene. The process comprises steps: heating, depressurizing and distilling the waste acid recycled after nitration reaction; collecting acid liquid A and distilled water A; mixing the acid liquid A with new concentrated sulfuric acid in proportion, and putting the mixture to a new Zoalene nitration reaction process; and putting the distilled water A into a diluting pot for diluting the liquid produced in the nitration reaction. The waste acid produced in the process of producing Zoalene is recycled and not directly discharged; water resources are recycled, waste of the water resources is reduced, and discharge of waste water produced in the process of producing Zoalene is greatly reduced, so that not only production cost is saved, but also environment pressure is reduced.

Abstract translation: 用于回收在生产Zoalene过程中产生的废酸的方法和装置。 该方法包括以下步骤：对硝化反应后再循环的废酸进行加热，减压和蒸馏; 收集酸性液体A和蒸馏水A; 将酸性液体A与新的浓硫酸成比例混合，并将混合物置于新的Zoalene硝化反应过程中; 并将蒸馏水A放入用于稀释硝化反应中产生的液体的稀释罐中。 在生产Zoalene过程中产生的废酸被回收利用，不能直接排放; 水资源循环利用，水资源浪费减少，生产Zoalene过程中产生的废水排放量大大减少，不仅节省了生产成本，而且降低了环境压力。

公开(公告)号：US09227909B2

公开(公告)日：2016-01-05

申请号：US14046068

申请日：2013-10-04

Applicant: Bayer MaterialScience AG

Inventor： Thomas Knauf ,  Jurgen Munnig ,  Joerg Schmiedler

IPC: C07C201/08

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

Abstract: The present invention relates to a method for producing nitrobenzene, in which the waste gas streams accruing in the process and containing benzene and (traces of) nitrobenzene, possibly low- and medium-boiling components, possibly non-condensable gases and possibly water, optionally after removal of nitrogen oxides, are scrubbed in an absorption column with nitrobenzene, which comprises only very small amounts (maximum 50 ppm) of benzene and is distributed by means of a liquid distributor at a rate of 50 to 200 drip points per square meter, preferably 60 to 120 drip points per square meter, wherein (i) a liquid stream containing benzene and nitrobenzene, possibly organic low- and medium-boiling components and additionally containing sulfuric acid if sulfuric acid is used as the scrubbing agent and (ii) waste gas depleted in benzene and possibly in organic low- and medium-boiling components are obtained. A waste gas purified by the method according to the invention is particularly suitable for burning in a thermal exhaust air treatment process.

Abstract translation: 本发明涉及生产硝基苯的方法，其中在该方法中产生的含有苯和（痕量）硝基苯的废气流，可能是低沸点和中沸点组分，可能是不可冷凝气体和可能的水，任选地 在除去氮氧化物之后，用硝基苯洗涤吸收塔，硝基苯仅包含极少量（最大50ppm）的苯，并以50至200滴每平方米的液滴分配器分配， 优选60至120滴/平方米，其中（i）含有苯和硝基苯的液体流，可能是有机低沸点和中沸点组分，如果使用硫酸作为洗涤剂，另外含有硫酸，和（ii）废物 获得了在苯中以及可能在有机低沸点和中沸点组分中贫化的气体。 通过根据本发明的方法净化的废气特别适用于在热排气处理过程中燃烧。

公开(公告)号：US20150352488A1

公开(公告)日：2015-12-10

申请号：US14300504

申请日：2014-06-10

Applicant: Bayer MaterialScience LLC ,  Bayer MaterialScience AG

Inventor： Bernd Pennemann ,  Ulrich Westphal ,  Dieter Foertsch ,  Spotswood Miller

IPC: B01D53/56 ,  C07C201/08 ,  C07C209/76 ,  B01D53/77 ,  C07C209/32

CPC classification number: B01D53/56 ,  B01D53/77 ,  C07C201/08 ,  C07C209/32 ,  C07C209/36 ,  C07C209/76 ,  C07C209/34 ,  C07C211/49 ,  C07C211/47 ,  C07C205/06 ,  C07C211/46

Abstract: The invention relates to a method for reducing the concentration of nitrogen oxides in waste gases released dating the production of organic amino compounds, wherein an organic compound is first reacted with NOx and/or nitric acid to form an organic nitro compound with the formation of an NOx-containing waste gas stream and the organic nitro compound is converted to the organic ammo compound by means of hydrogen-containing reaction gas, the reaction of the organic nitro compound with the hydrogen-containing reduction gas taking place with the formation of a hydrogen-containing waste gas stream, the method being characterised in that the NOx-containing waste gas stream is combined with the hydrogen-containing waste gas stream and/or an externally supplied hydrogen stream and is reacted at a temperature of 800 to 1700° C. for the at least partial reduction of the NOx concentration. The invention additionally relates to an apparatus for carrying out the method.

Abstract translation: 本发明涉及一种用于降低生产有机氨基化合物释放的废气中的氮氧化物浓度的方法，其中有机化合物首先与NO x和/或硝酸反应以形成有机硝基化合物，形成 含有NOx的废气流和有机硝基化合物通过含氢反应气体转化为有机氨基化合物，有机硝基化合物与含氢还原气体的反应发生，形成氢 - 该方法的特征在于，将含NO x的废气流与含氢废气流和/或外部供应的氢气流合并，并在800至1700℃的温度下反应，以便 NOx浓度的至少部分降低。 本发明还涉及一种用于执行该方法的装置。

公开(公告)号：US09102586B2

公开(公告)日：2015-08-11

申请号：US14159875

申请日：2014-01-21

Applicant: Huntsman International LLC

Inventor： Arend-Jan Zeeuw ,  Mark Geoffrey Bent

IPC: C07C211/00 ,  C07C209/00 ,  C07C209/68 ,  C07C209/36 ,  C07C209/78 ,  C07C201/08 ,  C07C209/82 ,  C02F1/20 ,  C02F9/00 ,  C02F101/32 ,  C02F101/38

CPC classification number: C07C209/68 ,  C02F1/20 ,  C02F9/00 ,  C02F2101/322 ,  C02F2101/38 ,  C07C201/08 ,  C07C209/36 ,  C07C209/78 ,  C07C209/82 ,  C07C211/46 ,  C07C205/06 ,  C07C211/50

Abstract: According to the present invention, a method of producing DADPM is provided. The method comprises: converting benzene into nitrobenzene thereby providing a nitrobenzene stream and a first aqueous waste stream comprising nitrobenzene; converting said nitrobenzene from said nitrobenzene stream into aniline, thereby providing an aniline stream and a first part of a second aqueous waste stream comprising aniline; removing nitrobenzene from said aniline prior to converting said aniline from said aniline stream into DADPM; converting said aniline from said aniline stream into DADPM thereby providing a second part of said second aqueous waste stream comprising aniline; stripping aniline and nitrobenzene from said first and second aqueous waste stream by means of a stripping column; providing the stripped aniline and nitrobenzene to said aniline cleaning apparatus or to said nitrobenzene stream.

Abstract translation: 根据本发明，提供了一种生产DADPM的方法。 该方法包括：将苯转化为硝基苯，从而提供硝基苯料流和包含硝基苯的第一含水废液流; 将所述硝基苯从所述硝基苯流转化成苯胺，从而提供苯胺流和包含苯胺的第二含水废液流的第一部分; 在将所述苯胺从所述苯胺流转化为DADPM之前，从所述苯胺中除去硝基苯; 将所述苯胺从所述苯胺流转化成DADPM，从而提供包含苯胺的所述第二含水废液流的第二部分; 通过汽提塔从所述第一和第二废水流中汽提苯胺和硝基苯; 向所述苯胺清洁装置或所述硝基苯流提供汽提的苯胺和硝基苯。

公开(公告)号：US20130197268A1

公开(公告)日：2013-08-01

申请号：US13812653

申请日：2011-07-26

Applicant: Thomas Knauf ,  Alexandre Racoes ,  Andreas Karl Rausch ,  Dietrich Wulf

Inventor： Thomas Knauf ,  Alexandre Racoes ,  Andreas Karl Rausch ,  Dietrich Wulf

IPC: C07C201/08 ,  C07C209/32

CPC classification number: C07C201/08 ,  C07C209/325 ,  C07C209/36 ,  C07C205/06 ,  C07C211/46

Abstract: The invention relates to a process for the continuous production of nitrobenzene by nitration of benzene with a mixture of nitric acid and sulfuric acid under adiabatic conditions, in which unreacted benzene is separated from the crude product obtained after phase separation before washing thereof, using the adiabatic heat of reaction.

Abstract translation: 本发明涉及一种通过在绝热条件下用硝酸和硫酸的混合物硝化苯来连续生产硝基苯的方法，其中将未反应的苯与洗脱之前相分离后获得的粗产物分离，使用绝热 反应热。