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：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。