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    METHOD FOR REMOVING HCN FROM CRUDE DINITRO TOLUENE
    154.
    发明申请
    METHOD FOR REMOVING HCN FROM CRUDE DINITRO TOLUENE 有权
    从原料中除去HCN的方法

    公开(公告)号：US20160194270A1

    公开(公告)日：2016-07-07

    申请号：US14916210

    申请日：2014-09-01

    Applicant: BASF SE

    Inventor： Yuan Shen DAI ,  Katharina SPUHL ,  Renate HEMPEL

    IPC: C07C201/16 ,  C07C201/08

    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。

    Method and apparatus for denenoxing waste gases from nitration
    155.
    发明授权
    Method and apparatus for denenoxing waste gases from nitration 有权
    用于硝化硝化废气的方法和装置

    公开(公告)号：US09346012B2

    公开(公告)日：2016-05-24

    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: C07C209/00 ,  B01D53/56 ,  B01D53/77 ,  C07C209/32 ,  C07C209/76 ,  C07C201/08 ,  C07C209/36

    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。

    PROCESS FOR WORKING UP WASTE WATER FROM NITROBENZENE PREPARATION
    156.
    发明申请
    PROCESS FOR WORKING UP WASTE WATER FROM NITROBENZENE PREPARATION 有权
    从硝基苯制备工作废水的工艺

    公开(公告)号：US20160075582A1

    公开(公告)日：2016-03-17

    申请号：US14784443

    申请日：2014-04-15

    Applicant: BAYER MATERIALSCIENCE AG

    Inventor： Thomas Knauf ,  Antoni Mairata ,  Erik Sluyts ,  Jan Van Tricht

    IPC: C02F9/00 ,  C07C201/08

    CPC classification number: C02F9/00 ,  C02F1/025 ,  C02F1/20 ,  C02F1/66 ,  C02F2101/16 ,  C02F2101/322 ,  C02F2101/38 ,  C02F2103/18 ,  C02F2103/36 ,  C02F2301/066 ,  C07C201/08 ,  C07C201/16 ,  C07C205/06

    Abstract: The present invention provides a process for working up alkaline waste water which is formed during washing of crude nitrobenzene obtained by nitration of benzene, wherein(i) the alkaline waste water is heated to a temperature of from 150° C. to 500° C. under an increased pressure with respect to atmospheric pressure with exclusion of oxygen;(ii) a base is added to the waste water obtained in (i); and(iii) the waste water obtained in (ii) is purified further by stripping with a stripping gas and the stripping gas strewn loaded with impurities is then cooled to a temperature of from 10° C. to 60° C.

    Abstract translation: 本发明提供一种处理在通过硝化苯获得的粗硝基苯洗涤过程中形成的碱性废水的方法，其中（i）将碱性废水加热至150℃至500℃的温度。 在相对于排除氧气的大气压力的增加的压力下; （ii）向（i）中获得的废水中加入碱; 和（iii）通过汽提气体进一步纯化在（ii）中获得的废水，并将载有杂质的汽提气体冷却至10℃至60℃的温度。

    Method for producing nitrobenzene by adiabatic nitriding
    157.
    发明授权
    Method for producing nitrobenzene by adiabatic nitriding 有权
    通过绝热氮化生产硝基苯的方法

    公开(公告)号：US09284255B2

    公开(公告)日：2016-03-15

    申请号：US14413277

    申请日：2013-07-23

    Applicant: Bayer MaterialScience AG

    Inventor： Thomas Knauf ,  Alexandre Racoes ,  Wolfgang Dohmen ,  Antoni Mairata

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

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

    Abstract: The invention relates to an adiabatic process for producing nitrobenzene by nitrating benzene with sulphuric acid mixtures and nitric acid mixtures using a stoichiometric excess of benzene and reusing non-reacted benzene, the content of the aliphatic organic compounds in the feed benzene being limited, by the targeted evacuation of aliphatic organic compounds to at least one step in the process, to a content of less than 1.5 mass-%, in relation to the total amount of feed benzene.

    Abstract translation: 本发明涉及通过使用化学计量过量的苯用硝酸混合物和硝酸混合物硝化苯并重新使用未反应的苯来生产硝基苯的绝热方法，所述进料苯中的脂肪族有机化合物的含量受到限制， 将脂肪族有机化合物定向排出至该步骤中的至少一个步骤，其含量相对于进料苯的总量小于1.5质量％。

    Method for producing nitrobenzene by adiabatic nitriding
    158.
    发明授权
    Method for producing nitrobenzene by adiabatic nitriding 有权
    通过绝热氮化生产硝基苯的方法

    公开(公告)号：US09260377B2

    公开(公告)日：2016-02-16

    申请号：US14415788

    申请日：2013-07-23

    Applicant: Bayer MaterialScience AG

    Inventor： Thomas Knauf ,  Michael Merkel ,  Antoni Mairata

    IPC: C07C201/06 ,  C07C201/08

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

    Abstract: The invention provides a continuous adiabatic process for the preparation of nitrobenzene by nitrating benzene with mixtures of sulfuric and nitric acids using a stoichiometric excess of benzene, wherein the content of organic compounds in the circulating sulfuric acid, at least during the start-up period of the production plant, is always kept below 1.0 mass percent, based on the total mass of circulating sulfuric acid. This is preferably achieved by a procedure in which, either after the end or before the beginning of a production cycle, the circulating sulfuric acid is circulated at elevated temperature so that the organics contained in the sulfuric acid, preferably comprising nitrobenzene and traces of benzene, dinitrobenzene and nitrophenols, are separated off in the evaporation apparatus for concentrating the sulfuric acid.

    Abstract translation: 本发明提供了一种连续的绝热方法，用于通过使用化学计量过量的苯将硫与硝酸的混合物硝化苯来制备硝基苯，其中循环硫酸中有机化合物的含量至少在启动期间 基于循环硫酸的总质量，生产厂总是保持在1.0质量％以下。 这优选通过以下程序来实现，其中，在生产周期结束或开始之前循环硫酸在升高的温度下循环，使得包含在硫酸中的有机物，优选包含硝基苯和痕量的苯， 二硝基苯和硝基苯酚在用于浓缩硫酸的蒸发装置中分离出来。

    SEPARATION METHOD FOR DINITROTOLUENE AND MIXED ACID IN A TOLUENE TO DINITROTOLUENE PROCESS
    160.
    发明申请
    SEPARATION METHOD FOR DINITROTOLUENE AND MIXED ACID IN A TOLUENE TO DINITROTOLUENE PROCESS 有权

    公开(公告)号：US20150329469A1

    公开(公告)日：2015-11-19

    申请号：US14653687

    申请日：2013-12-10

    Applicant: BASF SE ,  SHANGHAI BASF POLYURETHANE COMPANY LIMITED

    Inventor： Yuanshen DAI ,  Da Peng LI ,  Pei Shi JIA ,  Zhan CAI ,  Samuel NETO

    IPC: C07C201/08

    CPC classification number: C07C201/08 ,  B01D17/0217 ,  C07C201/16 ,  C07C205/06

    Abstract: Proposed is a separation method in a toluene to dinitrotoluene process, wherein said method with a first process step comprising feeding a toluene comprising first stream (1) and a nitric acid comprising second stream (2) into a first reactor (R1), re acting of the toluene comprising first stream (1) and the nitric acid comprising second stream (2) within the first reactor (R1) to a first reaction mixture (3), said first reaction mixture (3) comprising a first liquid/liquid mixed phase of an acid phase and an organic in phase comprising mononitrotoluene, feeding the first reaction mixture (3) into a first separation device (S1), separating the first reaction mixture (3) within the first separation device (S1) into a first forward stream (4) having a flow direction to a second process step and a first backward stream (5) having a flow direction back to the first reactor (R1), said method having a second process step comprising feeding the first forward stream (4) into a second reactor (R2), feeding a nitric acid comprising third stream (6) and a sulfuric acid comprising fourth stream (7) into the second reactor (R2), reacting of the first forward stream (4), the nitric acid comprising third stream (6) and the sulfuric acid comprising fourth stream (7) within the second reactor (R2) to a second reaction mixture (8), said second reaction mixture (8) comprising a second liquid/liquid mixed acid phase and an organic phase comprising mononitrotoluene and dinitrotoluene, feeding the second reaction mixture (8) into a second separation device (S2), separating the second reaction mixture (8) within the second separation device (S2) into a second forward stream (9) having a flow direction to a process output and a second backward stream (10) having a flow direction back to the first reactor (R1), wherein fine separating of at least one of the streams (4, 5, 9,10) after the first separation step (S1) and/or the second separation step (S2) in a coalescer is carried out.

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