公开(公告)号：US20150087862A1

公开(公告)日：2015-03-26

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

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 comprises: A) supplying aromatic nitro compounds and hydrogen to a reactor and contacting them with a hydrogenation catalyst; and B) stopping the supply of aromatic nitro compounds and hydrogen to the reactor. In addition, B) is carried out by: B1) stopping the supply of aromatic nitro compounds to the reactor such that any remaining aromatic nitro compounds present in the reactor and/or in parts of the installation that are fluidically connected to the reactor upstream react with the hydrogen that is still being supplied to the reactor, and B2) stopping the supply of hydrogen after a predetermined time interval and/or after the concentration of aromatic nitro compounds in the gas flow entering the reactor falls below a predetermined value.

Abstract translation: 本发明涉及芳香族硝基化合物的氢化制造芳香胺的方法。 该方法包括：A）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; 和B）停止向反应器供应芳族硝基化合物和氢气。 此外，B）通过以下方式进行：B1）停止向反应器供应芳族硝基化合物，使得存在于反应器中的任何剩余的芳族硝基化合物和/或流体连接到反应器上游的部分设备反应 其中仍然供应到反应器的氢气，以及B2）在预定时间间隔之后和/或在进入反应器的气流中的芳族硝基化合物的浓度之后停止氢气供应降低到预定值以下。

公开(公告)号：US09284256B2

公开(公告)日：2016-03-15

申请号：US14415794

申请日：2013-07-23

Applicant: Bayer MaterialScience AG

Inventor： Thomas Knauf ,  Michael Merkel

IPC: C07C201/00 ,  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：US20150099906A1

公开(公告)日：2015-04-09

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.

公开(公告)号：US20150080611A1

公开(公告)日：2015-03-19

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

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 comprises the steps: A) making a reactor containing a hydrogenation catalyst available; B) supplying aromatic nitro compounds and hydrogen to the reactor and contacting them with a hydrogenation catalyst, with at least the hydrogen which is supplied to the reactor is by means of a compressor and the compressor contains an operating fluid which at least partially contacts the hydrogen; and C) regenerating the hydrogenation catalyst by heating and contacting it with oxygen. After step C), steps D1) and/or D2) are carried out. Step D1) removes at least some of any fluids that are present in the reactor and/or in parts of the installation which are fluidically connected to the reactor downstream, with the fluids having been at least partially present in the reactor and/or in these parts of the installation during C).Step D2) at least partially replaces the operating fluid of the compressor which was present in the compressor and/or in recirculation devices connected to the compressor during step C) by an operating fluid which was not present in the compressor and/or in recirculation devices connected to the compressor during step C).

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。 该方法包括以下步骤：A）制备含有氢化催化剂的反应器; B）将芳基硝基化合物和氢气供应到反应器中并使其与氢化催化剂接触，至少提供给反应器的氢气是借助于压缩机，并且压缩机包含至少部分地接触氢气的工作流体 ; 和C）通过加热和使其与氧接触来再生氢化催化剂。 在步骤C）之后，执行步骤D1）和/或D2）。 步骤D1）除去反应器和/或在装置的流体连接到反应器下游的部分中的至少一些流体，其中流体至少部分地存在于反应器和/或这些 C）部分安装。 在步骤C）期间，步骤D2）至少部分地替换存在于压缩机中的压缩机的工作流体和/或在步骤C）期间连接到压缩机的再循环装置中的压缩机的工作流体，该工作流体不存在于压缩机和/或再循环装置 在步骤C）中连接到压缩机。

公开(公告)号：US09771290B2

公开(公告)日：2017-09-26

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 ,  C02F1/02 ,  C02F1/20 ,  C02F1/66 ,  C07C201/16 ,  C07C201/08 ,  C02F101/32 ,  C02F101/38 ,  C02F103/18 ,  C02F101/16 ,  C02F103/36

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 stream loaded with impurities is then cooled to a temperature of from 10° C. to 60° C.

公开(公告)号：US20160060152A1

公开(公告)日：2016-03-03

申请号：US14784699

申请日：2014-04-14

Applicant: BAYER MATERIALSCIENCE AG

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

IPC: C02F9/00 ,  C07C209/36 ,  C07C201/16 ,  C02F1/02 ,  C02F1/20

CPC classification number: C02F9/00 ,  C02F1/025 ,  C02F1/04 ,  C02F1/20 ,  C02F2101/322 ,  C02F2101/38 ,  C02F2103/18 ,  C02F2209/06 ,  C02F2301/046 ,  C07C201/08 ,  C07C201/16 ,  C07C209/36 ,  C07C205/06

Abstract: The invention relates to 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 under an increased pressure with respect to atmospheric pressure with exclusion of oxygen and is then cooled and expanded; (ii) the waste water obtained in (i) is purified further by stripping with a stripping gas and the stripping gas stream loaded with impurities is then cooled to a temperature of from 10° C. to 60° C.; and (iii) the liquid process product obtained in (ii) by cooling the stripping gas stream loaded with impurities is separated into an aqueous and an organic phase and the organic phase is used further in an aniline production process.

Abstract translation: 本发明涉及一种处理在通过硝化苯得到的粗硝基苯洗涤过程中形成的碱性废水的方法，其中（i）碱性废水在相对于大气压的增压下被加热而排除氧气， 然后冷却和膨胀; （ii）（i）中获得的废水通过汽提气体进一步纯化，然后将装有杂质的汽提气流冷却至10℃至60℃的温度; 和（iii）通过将负载有杂质的汽提气体冷却而获得的（ii）中获得的液体处理产物分离成水相和有机相，有机相进一步用于苯胺生产过程。

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：US20150094493A1

公开(公告)日：2015-04-02

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.

Abstract translation: 本发明涉及一种处理包含芳族胺的物质混合物的方法，其中芳族胺是苯胺或2,4-二氨基甲苯，优选苯胺。 物质混合物包含芳族胺和沸点高于芳族胺的化合物。 用于处理物质混合物的方法需要I）在第一蒸馏单元（110,1130）中通过蒸馏分离第一物质混合物，以至少部分地除去该方法中的一些芳族胺，并获得第一底部 从第一蒸馏单元（110,1130）除去的产物。 从第一蒸馏单元（110,1130）中除去后，用不同于第一蒸馏单元的蒸馏单元和/或包含甲醇的组合物的冷凝顶部产物稀释底部产物。