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公开(公告)号：BR9612053A
公开(公告)日：1999-02-23
申请号：BR9612053
申请日：1996-12-20
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公开(公告)号：CA2299475A1
公开(公告)日：1999-02-18
申请号：CA2299475
申请日：1998-08-04
Applicant: BASF AG
Inventor： MAUER PETER , WATZENBERGER OTTO , STROFER ECKHARD , SCHNEIDER HANS-MICHAEL , SCHELLING HEINER
IPC: C01B21/14
Abstract: The invention relates to a method for producing an aqueous solution of free hydroxylamine by treating a hydroxylammonium salt with ammonia in the countercurrent in a stripping column. As a result, hydroxylamine is released and at the same time, the solution obtained is separated into an aqueous hydroxylamine solution and a salt fraction by distillation. The inventive method is simple and mild, and can be carried out on a large scale. The risk of decomposition is minimal due to the low thermal burden, the low concentration of hydroxylamine and the short residence time involved in the process.
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公开(公告)号：BR9612078A
公开(公告)日：1999-02-17
申请号：BR9612078
申请日：1996-12-20
Applicant: BASF AG
Inventor： SCHNEIDER HANS-MICHAEL , LEUTNER BERND
IPC: C01B21/14 , C07C20060101 , C07C215/00 , C07D521/00
Abstract: The present invention relates to stabilized hydroxylamine solutions comprising as stabilizer at least one compound of the formula I R1R2N-A-NR3R4 (I) in which A and R1 to R4 are as defined in the description.
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公开(公告)号：NO982847L
公开(公告)日：1998-08-17
申请号：NO982847
申请日：1998-06-19
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公开(公告)号：NO982848D0
公开(公告)日：1998-06-19
申请号：NO982848
申请日：1998-06-19
Applicant: BASF AG
Inventor： SCHNEIDER HANS-MICHAEL , LEUTNER BERND
IPC: C07C20060101 , C01B21/14 , C07C215/00 , C07D521/00 , C01B
Abstract: The present invention relates to stabilized hydroxylamine solutions comprising as stabilizer at least one compound of the formula I R1R2N-A-NR3R4 (I) in which A and R1 to R4 are as defined in the description.
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Patent Agency Ranking
公开(公告)号：CA2239253A1
公开(公告)日：1997-06-26
申请号：CA2239253
申请日：1996-12-20
Abstract: 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：CA2239253C
公开(公告)日：2006-01-31
申请号：CA2239253
申请日：1996-12-20
Abstract: 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 sho rt dwelling time during implementation of the process.
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公开(公告)号：NO319309B1
公开(公告)日：2005-07-11
申请号：NO982847
申请日：1998-06-19
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公开(公告)号：PT868399E
公开(公告)日：2003-01-31
申请号：PT96944616
申请日：1996-12-20
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公开(公告)号：DK0868399T3
公开(公告)日：2002-10-07
申请号：DK96944616
申请日：1996-12-20
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