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公开(公告)号：EP1534630B1
公开(公告)日：2006-04-26
申请号：EP04710790.9
申请日：2004-02-13
申请人： Domo Caproleuna GmbH
IPC分类号： C01B21/14
CPC分类号： C01B21/1445 , B01D3/343 , Y10S203/06
摘要： The invention relates to a method for producing an aqueous solution of free hydroxylamine (HA) by simultaneously treating an HA salt with ammonia or ammonia water in a countercurrent and separating by distillation and concentrating the aqueous HA solution in the countercurrent by means of a stripping medium. According to the invention, a mixture of water vapor and a noncondensable inert gas is used as a stripping medium while the temperature of the process at a defined pressure is regulated by means of the quantity of noncondensable inert gas provided at the inlet of the column. Preferably, nitrogen is used as a noncondensable inert gas, whereby the method for producing aqueous solutions of free HA is made safer and losses are reduced.
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公开(公告)号：EP1406832A1
公开(公告)日：2004-04-14
申请号：EP02745423.0
申请日：2002-07-02
发明人： WOSTBROCK, Karl-Heinz , THIEL, Joachim , KRÜGER, Heinz , STRÖFER, Eckhard , WEBER, Markus , GERBER, Bernd , RUMPF, Bernd , SACHWEH, Bernd , KERTH, Steffen
CPC分类号： C01B21/1445 , B01D3/16 , B01J19/30 , B01J19/32 , B01J2219/30215 , B01J2219/30466 , B01J2219/3221 , B01J2219/32483 , Y10S203/20 , Y10S261/72
摘要： The invention relates to a method for the production of a salt-free aqueous hydroxylamine solution by distilling an aqueous solution of an hydroxylammonium salt and a base in a plate column having at least two mechanical plates. The invention is characterized in that packings or structured packings are placed above at least one of the plates of the plate column along the cross section of said column.
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公开(公告)号：EP0868399A1
公开(公告)日：1998-10-07
申请号：EP96944616.0
申请日：1996-12-20
CPC分类号： C01B21/1445 , B01D3/146 , B01D3/38 , C01B21/1463 , C01B21/1472
摘要： A process is disclosed for producing an aqueous solution of free hydroxylamine. A solution obtained by treating an hydroxylammonium salt with a base is treated with water or water vapour at a temperature ≥ 80 °C, so as to separate the solution into an aqueous hydroxylamine fraction and a salt fraction. This process is soft and easy to implement on a large scale. The risk of decomposition is minimised because of the low thermal stresses, the low hydroxylamine concentration and the short dwelling time during implementation of the process.
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公开(公告)号：EP0230958B1
公开(公告)日：1990-05-09
申请号：EP87100688.8
申请日：1987-01-20
IPC分类号： C01B21/14
CPC分类号： C01B21/1445
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5.发明公开Preparation from hydroxylammonium sulfate of alcoholic hydroxylamine solutions and of oximes, hydroxamic acids and other hydroxylammonium salts via alcoholic hydroxylamine solutions 失效醇溶性羟基苯胺解决方案的羟基磺酸钠的制备及其盐，羟基酸和其他羟基磺酸盐的制备通过醇性羟基胺溶液
公开(公告)号：EP0108294A3
公开(公告)日：1986-08-13
申请号：EP83110342
申请日：1983-10-17
申请人： ALLIED CORPORATION
IPC分类号： C01B21/14 , C07C51/41 , C07C83/10 , C07C131/00
CPC分类号： C07C51/412 , C01B21/1445 , C01B21/1454 , C07C63/08 , C07C53/10 , C07C55/07 , C07C53/06
摘要： Solid hydroxylammonium sulfate is reacted with an alcohol solution of an alkali metal hydroxide or alkoxide to produce an alcoholic hydroxylamine liquid phase and a sulfate-containing solid phase. The liquid phase is used for further reactions such as oximations and hydroxamic acid production, or for the production of other hydroxylammonium salts such as the nitrate, perchlorate, formate or oxalate. The different bases behave differently with regard to suitable and preferable solvents and temperatures.
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6.发明公开
公开(公告)号：EP0108294A2
公开(公告)日：1984-05-16
申请号：EP83110342.9
申请日：1983-10-17
申请人： AlliedSignal Inc.
IPC分类号： C01B21/14 , C07C51/41 , C07C249/04 , C07C259/04
CPC分类号： C07C51/412 , C01B21/1445 , C01B21/1454 , C07C63/08 , C07C53/10 , C07C55/07 , C07C53/06
摘要： Solid hydroxylammonium sulfate is reacted with an alcohol solution of an alkali metal hydroxide or alkoxide to produce an alcoholic hydroxylamine liquid phase and a sulfate-containing solid phase. The liquid phase is used for further reactions such as oximations and hydroxamic acid production, or for the production of other hydroxylammonium salts such as the nitrate, perchlorate, formate or oxalate. The different bases behave differently with regard to suitable and preferable solvents and temperatures.
摘要翻译： 固体硫酸羟铵在碱金属氢氧化物或醇盐的醇溶液反应以产生对酒精羟胺液相和含硫酸盐的固相。 将液相用于进一步的反应：如逼近与异羟肟酸的生产，或用于生产其他羟铵盐的：如硝酸盐，高氯酸盐，甲酸盐或草酸盐。 不同的基地对于合适且优选的溶剂和温度表现不同。
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公开(公告)号：EP1663862A2
公开(公告)日：2006-06-07
申请号：EP04771815.0
申请日：2004-08-12
申请人： Showa Denko K.K.
IPC分类号： C01B21/14
CPC分类号： C01B21/1463 , C01B21/1445 , C01B21/1472 , C01B21/1481 , C01B21/149
摘要： It is an object of the present invention to provide a process for producing a hydroxylamine by reacting a salt of hydroxylamine with an alkali compound, where the yield reduction due to formation of a complex between the produced hydroxylamine and a salt produced as a by-product or adsorption of the hydroxylamine to the by-product salt is decreased, and a high-concentration and high-purity hydroxylamine is safely produced at a high yield. The process for producing a hydroxylamine of the present invention comprises a reaction step of reacting a salt of hydroxylamine with an alkali compound to obtain a hydroxylamine while keeping the reaction solution at a pH of 7 or more, a purification step of purifying the hydroxylamine by ion exchange, and a concentration step of concentrating the hydroxylamine by distillation at the column bottom.
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8.发明公开VERFAHREN ZUR HERSTELLUNG EINER WÄSSRIGEN LÖSUNG VON HYDROXYLAMIN 有权VERFAHREN ZUR HERSTELLUNG EINERWÄSSRIGENLÖSUNGVON HYDROXYLAMIN
公开(公告)号：EP1534630A1
公开(公告)日：2005-06-01
申请号：EP04710790.9
申请日：2004-02-13
申请人： Domo Caproleuna GmbH
IPC分类号： C01B21/14
CPC分类号： C01B21/1445 , B01D3/343 , Y10S203/06
摘要： The invention relates to a method for producing an aqueous solution of free hydroxylamine (HA) by simultaneously treating an HA salt with ammonia or ammonia water in a countercurrent and separating by distillation and concentrating the aqueous HA solution in the countercurrent by means of a stripping medium. According to the invention, a mixture of water vapor and a noncondensable inert gas is used as a stripping medium while the temperature of the process at a defined pressure is regulated by means of the quantity of noncondensable inert gas provided at the inlet of the column. Preferably, nitrogen is used as a noncondensable inert gas, whereby the method for producing aqueous solutions of free HA is made safer and losses are reduced.
摘要翻译： 本发明涉及通过与氨或氨水同时逆流处理HA盐，然后通过蒸馏分离HA和将HA水溶液再次与汽提介质逆流再浓缩来生产游离羟胺（HA）的水溶液的方法 。 根据本发明使用的汽提介质是蒸汽和不可冷凝的惰性气体的混合物，并且在限定压力下的工艺温度由塔入口处的不可冷凝惰性气体的量来控制。 优选的不可冷凝惰性气体是氮气。 这导致提高游离HA的水溶液的安全性和减少生产水溶液的方法的损失。
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公开(公告)号：EP0868399B1
公开(公告)日：2002-08-21
申请号：EP96944616.0
申请日：1996-12-20
IPC分类号： C01B21/14
CPC分类号： C01B21/1445 , B01D3/146 , B01D3/38 , C01B21/1463 , C01B21/1472
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公开(公告)号：EP0989952A1
公开(公告)日：2000-04-05
申请号：EP98934975.8
申请日：1998-06-18
IPC分类号： C01B21/14
CPC分类号： C01B21/1481 , C01B21/1445 , C01B21/1463
摘要： The invention relates to a method for the production of highly pure aqueous solution from free hydroxylamine, wherein the diluted aqueous hydroxylamine solution is concentrated in a column, the vapor containing hydroxylamine is removed from the bottom of the column via a side-stream and highly pure hydroxylamine is obtained through condensation of the vapors. The inventive method is simple and mild, can be used in large-scale production and yields 'electronic grade' hydroxylamine.
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