公开(公告)号：US09290438B2

公开(公告)日：2016-03-22

申请号：US14394139

申请日：2013-04-12

Applicant: Bayer MaterialScience AG

Inventor： Michael Merkel ,  Thomas Knauf ,  Cliff Andre Peters ,  Thorsten Schmidt

IPC: C07C209/36 ,  C07C209/84

CPC classification number: C07C209/36 ,  C07C209/84 ,  Y02P20/584 ,  C07C211/46 ,  C07C211/47

Abstract: The present invention relates to a method of producing aromatic amines by hydrogenation of aromatic nitro compounds. This method provides a reactor containing a hydrogenation catalyst; supplies aromatic nitro compounds and hydrogen to the reactor and contacts them with a hydrogenation catalyst, in which the hydrogen which is supplied to the reactor is by a compressor and the compressor contains an operating fluid which at least partially contacts the hydrogen; and regenerates the hydrogenation catalyst by heating and contacting it with oxygen. Particular operating liquids are subsequently exchanged.

Abstract translation: 本发明涉及通过芳族硝基化合物的氢化生产芳族胺的方法。 该方法提供含有氢化催化剂的反应器; 向反应器中提供芳族硝基化合物和氢气，并与氢化催化剂接触，氢化催化剂中，通过压缩机供给反应器的氢气，压缩机含有至少部分接触氢气的工作流体; 并通过加热和与氧接触来再生氢化催化剂。 随后更换特殊的操作液体。

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：US09682917B2

公开(公告)日：2017-06-20

申请号：US14397914

申请日：2013-04-29

Applicant: Bayer MaterialScience AG

Inventor： Michael Merkel ,  Thomas Knauf ,  Cliff Andre Peters ,  Thorsten Schmidt

IPC: C07C209/84

CPC classification number: C07C209/84 ,  C07C211/46 ,  C07C211/50

Abstract: The present invention relates to a method for treating a substance mixture comprising an aromatic amine, wherein the aromatic amine is aniline or 2,4-diaminotoluene, preferably aniline. The substance mixture comprises an aromatic amine and compounds having a higher boiling point than the aromatic amine. The method for treating the substance mixture requires I) separating the first substance mixture by means of distillation in a first distillation unit (110, 1130), to at least partially remove some of the aromatic amine in the process, and to obtain a first bottom product which is removed from the first distillation unit (110, 1130). After removal from the first distillation unit (110, 1130), the bottom product is diluted with a condensed top product from a distillation unit that is different from the first distillation unit and/or with a composition that comprises methanol.

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。

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％。

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。

公开(公告)号：US20150166460A1

公开(公告)日：2015-06-18

申请号：US14415794

申请日：2013-07-23

Applicant: Bayer MaterialScience AG

Inventor： Thomas Knauf ,  Michael Merkel

IPC: C07C201/08 ,  C07C201/16

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

Abstract: The present invention provides a continuous process for the production of nitrobenzene by nitration of benzene with mixtures of sulfuric and nitric acid using a stoichiometric excess of benzene, in which the content of aliphatic organic compounds in the feed benzene during the start-up period of the production plant is always maintained at less than 1.5 wt. %, based on the total mass of the feed benzene. This is achieved either by mixing the feed benzene comprising recycled unreacted benzene (recycled benzene) and benzene newly supplied to the reaction (fresh benzene) in appropriate quantitative ratios during the start-up period, depending on the purity of the two streams, or by completely omitting the recycling of unreacted benzene during the start-up period, i.e. the feed benzene consists only of benzene newly supplied to the reaction.

Abstract translation: 本发明提供了一种使用化学计量过量的苯硝化苯与硫酸和硝酸的混合物来生产硝基苯的连续方法，其中在起始时期的进料苯中的脂族有机化合物的含量 生产厂总是维持在1.5重量％以下。 ％，基于进料苯的总质量。 这可以通过在启动期间将包含再循环的未反应苯（再循环苯）和新提供给反应的苯（新鲜苯）的进料苯与合适的定量比例混合，取决于两个流的纯度，或者通过 在启动期间完全省略未反应苯的再循环，即进料苯仅由新提供给反应的苯组成。

公开(公告)号：US09469594B2

公开(公告)日：2016-10-18

申请号：US14394142

申请日：2013-04-12

Applicant: Bayer MaterialScience AG

Inventor： Michael Merkel ,  Thomas Knauf ,  Cliff Andre Peters ,  Thorsten Schmidt ,  Karl-Heinz Wilke

IPC: C07C209/36 ,  C07C209/84

CPC classification number: C07C209/36 ,  C07C209/84 ,  C07C211/46 ,  C07C211/47

Abstract: The present invention relates to a method for producing aromatic amines by the hydrogenation of aromatic nitro compounds. This method supplies aromatic nitro compounds and hydrogen to a reactor and contacts them with a hydrogenation catalyst; and stops the supply of aromatic nitro compounds and hydrogen to the reactor. The supply of aromatic nitro compounds and hydrogen to the reactor is stopped to ensure safe shutdown of the reactor.

Abstract translation: 本发明涉及通过芳族硝基化合物的氢化生产芳族胺的方法。 该方法将芳香族硝基化合物和氢气供给反应器，并与氢化催化剂接触; 并停止向反应器供应芳族硝基化合物和氢气。 停止向反应器供应芳族硝基化合物和氢气，以确保反应器的安全关闭。

公开(公告)号：US20150175522A1

公开(公告)日：2015-06-25

申请号：US14415788

申请日：2013-07-23

Applicant: Bayer MaterialScience AG

Inventor： Thomas Knauf ,  Michael Merkel ,  Antoni Mairata

IPC: C07C201/06

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。

公开(公告)号：US20150175521A1

公开(公告)日：2015-06-25

申请号：US14413277

申请日：2013-07-23

Applicant: Bayer MaterialScience AG

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

IPC: C07C201/06

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％。