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％。

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：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。