公开(公告)号：US09428441B2

公开(公告)日：2016-08-30

申请号：US14916210

申请日：2014-09-01

Applicant: BASF SE

Inventor： Yuan Shen Dai ,  Katharina Spuhl ,  Renate Hempel

IPC: C07C205/00 ,  C07C201/16 ,  C07C201/08 ,  C07C205/06

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

Abstract: A process for the preparation of dintrotoluene which comprises (a) nitrating toluene with a nitrating acid, wherein said nitrating acid is a mixture of nitric acid and sulfuric acid, in one or more nitration steps, and separating the nitrating acid from the process stream thus formed, wherein a crude mixture comprising dinitrotoluene and a fraction of said nitrating acid dissolved therein is obtained, said crude mixture further comprising at least 50 ppm of HCN, and (b) washing the crude dinitrotoluene containing mixture in one or more washing steps, wherein, before the first washing step is carried out, the crude mixture is distilled and/or stripped to remove HCN therefrom, wherein a crude dinitrotoluene containing mixture which is essentially free of HCN is obtained.

Abstract translation: 一种制备二苯并芴的方法，其包括（a）在一个或多个硝化步骤中将硝酸与硝酸反应，其中所述硝酸是硝酸和硫酸的混合物，并将硝酸与工艺流分离，因此 形成，其中获得包含二硝基甲苯和所述硝酸的一部分溶解在其中的粗混合物，所述粗混合物还包含至少50ppm的HCN，和（b）在一个或多个洗涤步骤中洗涤含有二硝基甲苯的粗混合物，其中 ，在进行第一洗涤步骤之前，将粗混合物蒸馏和/或汽提以从其中除去HCN，其中获得基本上不含HCN的粗二硝基甲苯混合物。

公开(公告)号：US09340486B2

公开(公告)日：2016-05-17

申请号：US13854491

申请日：2013-04-01

Applicant: ANGUS Chemical Company

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

IPC: B01J19/00 ,  C07C201/08 ,  C07C201/16 ,  C07C201/06 ,  B01J10/00

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.

公开(公告)号：US20160083332A1

公开(公告)日：2016-03-24

申请号：US14785763

申请日：2014-04-24

Applicant: Covestro Deutschland AG

Inventor： Antoni Mairata ,  Thomas Knauf

IPC: C07C201/08 ,  C07C201/16

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

Abstract: The present invention relates to a continuously operated adiabatic process for the preparation of nitrobenzene by nitration of benzene with nitric acid and sulfuric acid, in which the dilute sulfuric acid obtained after the nitration has taken place and the crude nitrobenzene has been separated off from the aqueous phase is concentrated for the purpose of re-use in the nitration, and after its concentration, at least one minute before it comes into contact with fresh nitric acid again an oxidizing agent is added such that a concentration of the oxidizing agent of from 10 ppm to 5,000 ppm, based on the total weight of the concentrated sulfuric acid to be recycled into the nitration, is established.

Abstract translation: 本发明涉及用硝酸和硫酸硝化苯来制备硝基苯的连续操作的绝热方法，其中在硝化发生后获得的稀硫酸和粗硝基苯已从水溶液中分离出来 浓缩的浓度是为了在硝化中重复使用，并且在其浓缩之后，再次与新鲜硝酸接触至少一分钟，加入氧化剂使得氧化剂的浓度为10ppm 至5,000ppm，基于要再循环到硝化中的浓硫酸的总重量。

公开(公告)号：US20150336875A9

公开(公告)日：2015-11-26

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 metre, preferably 60 to 120 drip points per square metre, 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：US20150174551A1

公开(公告)日：2015-06-25

申请号：US14632086

申请日：2015-02-26

Applicant: JOSEF MEISSNER GMBH & CO. KG

Inventor： Jürgen PÖHLMANN ,  Mirko HÄNDEL ,  Jürgen GEBAUER ,  Heinrich HERMANN

IPC: B01J19/24

CPC classification number: C07C201/16 ,  B01J19/24 ,  B01J2219/24 ,  C07C205/06

Abstract: The present invention relates to a method for removing impurities from nitrated crude products obtained during the nitration of nitratable aromatic compounds, after removal of the final nitrating acid, by treatment with a washing medium, and also to a plant or apparatus suitable for implementing this method. Further provided by the invention is a production plant for the nitration of nitratable aromatic compounds with subsequent purification of the nitrated products.

Abstract translation: 本发明涉及一种从硝化硝化硝酸中除去硝化酸后，通过用洗涤介质处理而得到的硝化粗产物中除去杂质的方法，以及适用于实施该方法的设备或装置 。 本发明进一步提供了一种用于硝化硝化的芳族化合物的生产设备，随后硝化产物的纯化。

公开(公告)号：US09050581B2

公开(公告)日：2015-06-09

申请号：US12808073

申请日：2008-12-16

Applicant: Ludivine Bouvier ,  Stéphane Kieger ,  Catherine Laroche ,  Philibert Leflaive ,  Tom Frising

Inventor： Ludivine Bouvier ,  Stéphane Kieger ,  Catherine Laroche ,  Philibert Leflaive ,  Tom Frising

IPC: B01J20/18 ,  B01J29/80 ,  C07C7/13 ,  C07C17/389 ,  B01J20/28 ,  C07C29/76 ,  C07C37/82 ,  C07C201/16

CPC classification number: B01J20/18 ,  B01J20/183 ,  B01J20/186 ,  B01J20/28004 ,  B01J20/2803 ,  C07C7/13 ,  C07C17/389 ,  C07C29/76 ,  C07C37/82 ,  C07C201/16 ,  Y02P20/52 ,  C07C15/08 ,  C07C25/08 ,  C07C31/18 ,  C07C39/07 ,  C07C205/06

Abstract: The present invention relates to aggregate zeolitic adsorbents based on zeolite X and zeolite LSX.These adsorbents are particularly suitable for separating C8 aromatic isomers and in particular xylenes, separating sugars, separating polyhydric alcohols, separating isomers of substituted toluenes, separating cresols, separating dichlorobenzenes.

Abstract translation: 本发明涉及基于沸石X和沸石LSX的聚合沸石吸附剂。 这些吸附剂特别适用于分离C8芳族异构体，特别是二甲苯，分离糖，分离多元醇，分离取代甲苯的异构体，分离甲酚，分离二氯苯。

公开(公告)号：US20140031594A1

公开(公告)日：2014-01-30

申请号：US14007531

申请日：2012-04-05

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

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

IPC: C07C205/02

CPC classification number: C07C205/02 ,  C07C201/08 ,  C07C201/16

Abstract: Disclosed are processes and apparatuses for concentrating at least one organic acid using an alkyl acetate as an entrainer. The processes and apparatuses may use the same alkyl acetate as an entrainer to concentrate a mixture of organic acids.

Abstract translation: 公开了使用乙酸烷基酯作为夹带剂浓缩至少一种有机酸的方法和装置。 方法和装置可以使用相同的乙酸烷基酯作为夹带剂来浓缩有机酸的混合物。

公开(公告)号：US08431754B2

公开(公告)日：2013-04-30

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: C07C205/00

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：US20130041189A1

公开(公告)日：2013-02-14

申请号：US13569806

申请日：2012-08-08

Applicant: Petra DECKERT ,  Leo Denissen ,  Bart Van De Voorde ,  Julia Leschinski ,  Stefan Robert Deibel ,  Matthias Fankhänel ,  Samuel Neto

Inventor： Petra DECKERT ,  Leo Denissen ,  Bart Van De Voorde ,  Julia Leschinski ,  Stefan Robert Deibel ,  Matthias Fankhänel ,  Samuel Neto

IPC: C07C201/16

CPC classification number: C07C201/16 ,  C07C205/06

Abstract: The invention relates to a process for purifying crude aromatic nitro compounds which originate from the nitration of aromatic compounds, comprising the single or multiple performance of the following wash stage (a):(a) contacting the crude aromatic nitro compound (N-in) with an aqueous phase (W-res) and then separating the phases to obtain an organic phase (N-res) and an aqueous phase (W-res),wherein at least one demulsifier (D) is present in one or more of the wash stages (a).

Abstract translation: 本发明涉及一种用于纯化源自芳族化合物硝化的粗芳族硝基化合物的方法，其包括以下洗涤阶段（a）的单次或多次性能：（a）使粗芳族硝基化合物（N-in） （W-res），然后分离相以获得有机相（N-res）和水相（W-res），其中至少一个破乳剂（D）存在于一个或多个 洗涤阶段（a）。

公开(公告)号：US20120197047A1

公开(公告)日：2012-08-02

申请号：US13362607

申请日：2012-01-31

Applicant: Holger ALLARDT ,  Andreas RAICHLE ,  Reiner REETZ ,  Johannes BÜTTNER ,  Michael ZÖLLINGER ,  Stefanie HAASE ,  Rüdiger FRITZ

Inventor： Holger ALLARDT ,  Andreas RAICHLE ,  Reiner REETZ ,  Johannes BÜTTNER ,  Michael ZÖLLINGER ,  Stefanie HAASE ,  Rüdiger FRITZ

IPC: C07C201/12 ,  B01J47/00

CPC classification number: B01J39/02 ,  B01J39/05 ,  B01J47/026 ,  B01J49/06 ,  B01J49/60 ,  B01J2220/56 ,  C07C201/16 ,  C07C205/06

Abstract: 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.

Abstract translation: 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。