公开(公告)号：DE19733681A1

公开(公告)日：1999-02-11

申请号：DE19733681

申请日：1997-08-04

Applicant: BASF AG

Inventor： WATZENBERGER OTTO DR ,  MAUER PETER ,  STROEFER ECKHARD DR ,  SCHELLING HEINER ,  SCHNEIDER HANS-MICHAEL DR

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 counter-current 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.

公开(公告)号：NO327773B1

公开(公告)日：2009-09-21

申请号：NO20000551

申请日：2000-02-03

Applicant: BASF AG

Inventor： SCHNEIDER HANS-MICHAEL ,  WATZENBERGER OTTO ,  MAUER PETER ,  STROFER ECKHARD ,  SCHELLING HEINER

IPC: C01B21/14

Abstract: An aqueous solution of free hydroxylamine is prepared by treating a hydroxylammonium salt with ammonia by the countercurrent method in a stripping column by a process in which hydroxylamine is liberated and at the same time the solution obtained is separated by distillation into an aqueous hydroxylamine solution and a salt fraction. The novel process can be carried out in a simple and gentle manner and on a large scale. The danger of decomposition is minimized owing to the low thermal load, the low concentration of hydroxylamine and the short residence time in the process.

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.

公开(公告)号：CA2299475C

公开(公告)日：2008-12-02

申请号：CA2299475

申请日：1998-08-04

Applicant: BASF AG

Inventor： SCHNEIDER HANS-MICHAEL ,  STROFER ECKHARD ,  SCHELLING HEINER ,  WATZENBERGER OTTO ,  MAUER PETER

IPC: C01B21/14

Abstract: The invention relates to a method for producing an aqueous solution of free hydroxy-lamine by treating a hydroxylammonium salt with ammonia in the counter-current 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.

公开(公告)号：RU2189350C2

公开(公告)日：2002-09-20

申请号：RU2000106063

申请日：1998-08-04

Applicant: BASF AG

Inventor： VATTSENBERGER OTTO ,  MAUER PETER ,  SHTREFER EHKKHARD ,  SHELLING KHAJNER ,  SHNAJDER KHANS-MIKHAEL

IPC: C01B21/14

Abstract: chemical technology. SUBSTANCE: invention relates to preparing aqueous solutions of hydroxylamine no containing metal ions. Method of preparing free hydroxylamine an aqueous solution involves treatment of hydroxylammonium salt with ammonia or ammonium hydroxide by countercurrent in a stripping tower that results to release of hydroxylamine and the obtained solution is subjected for distillation fractionation for hydroxylamine an aqueous solution and salt fraction simultaneously. The claimed method is carried out simple under mild conditions under pressure from 5 to 300 kPa in a stripping tower and from 1 to 200 kPa in a distillation column. Method is characterized by a nonsignificant thermal loading, low concentration of hydroxylamine and short time stay in a process that provides a minimal danger of decomposition that is estimated to be about 4.4 wt.%. The yield of hydroxylamine is about 94 wt.%. EFFECT: improved method of preparing, increased yield. 11 cl, 2 dwg, 3 ex

公开(公告)号：MY123175A

公开(公告)日：2006-05-31

申请号：MYPI9803533

申请日：1998-07-31

Applicant: BASF AG

Inventor： STROFER ECKHARD DR ,  WATZENBERGER OTTO DR ,  SCHNEIDER HANS-MICHAEL DR ,  SCHELLING HEINER ,  MAUER PETER

IPC: C01B21/14

Abstract: AN AQUEOUS SOLUTION OF FREE HYDROXYLAMINE IS PREPARED BY TREATING A HYDROXYLAMMONIUM SALT WITH AMMONIA BY THE COUNTERCURRENT METHOD IN A STRIPPING COLUMN BY A PROCESS IN WHICH HYDROXYLAMINE IS LIBERATED AND AT THE SAME TIME THE SOLUTION OBTAINED IS SEPARATED BY DISTILLATION INTO AN AQUEOUS HYDROXYLAMINE SOLUTION AND A SALT FRACTION. THE NOVEL PROCESS CAN BE CARRIED OUT IN A SIMPLE AND GENTLE MANNER AND ON A LARGE SCALE. THE DANGER OF DECOMPOSITION IS MINIMIZED OWING TO THE LOW THERMAL LOAD, THE LOW CONCENTRATION OF HYDROXYLAMINE AND THE SHORT RESIDENCE TIME IN THE PROCESS.

公开(公告)号：DE59804740D1

公开(公告)日：2002-08-14

申请号：DE59804740

申请日：1998-08-04

Applicant: BASF AG

Inventor： WATZENBERGER OTTO ,  MAUER PETER ,  STROEFER ECKHARD ,  SCHELLING HEINER ,  SCHNEIDER HANS-MICHAEL

IPC: C01B21/14

Abstract: An aqueous solution of free hydroxylamine is prepared by treating a hydroxylammonium salt with ammonia by the countercurrent method in a stripping column by a process in which hydroxylamine is liberated and at the same time the solution obtained is separated by distillation into an aqueous hydroxylamine solution and a salt fraction. The novel process can be carried out in a simple and gentle manner and on a large scale. The danger of decomposition is minimized owing to the low thermal load, the low concentration of hydroxylamine and the short residence time in the process.

公开(公告)号：AU748827B2

公开(公告)日：2002-06-13

申请号：AU9158698

申请日：1998-08-04

Applicant: BASF AG

Inventor： WATZENBERGER OTTO ,  MAUER PETER ,  STROFER ECKHARD ,  SCHELLING HEINER ,  SCHNEIDER HANS-MICHAEL

IPC: C01B21/14

Abstract: An aqueous solution of free hydroxylamine is prepared by treating a hydroxylammonium salt with ammonia by the countercurrent method in a stripping column by a process in which hydroxylamine is liberated and at the same time the solution obtained is separated by distillation into an aqueous hydroxylamine solution and a salt fraction. The novel process can be carried out in a simple and gentle manner and on a large scale. The danger of decomposition is minimized owing to the low thermal load, the low concentration of hydroxylamine and the short residence time in the process.

公开(公告)号：NO20000551D0

公开(公告)日：2000-02-03

申请号：NO20000551

申请日：2000-02-03

Applicant: BASF AG

Inventor： WATZENBERGER OTTO ,  MAUER PETER ,  STROEFER ECKHARD ,  SCHELLING HEINER ,  SCHNEIDER HANS-MICHAEL

IPC: C01B21/14 ,  C01B

Abstract: An aqueous solution of free hydroxylamine is prepared by treating a hydroxylammonium salt with ammonia by the countercurrent method in a stripping column by a process in which hydroxylamine is liberated and at the same time the solution obtained is separated by distillation into an aqueous hydroxylamine solution and a salt fraction. The novel process can be carried out in a simple and gentle manner and on a large scale. The danger of decomposition is minimized owing to the low thermal load, the low concentration of hydroxylamine and the short residence time in the process.

公开(公告)号：ES2180194T3

公开(公告)日：2003-02-01

申请号：ES98943835

申请日：1998-08-04

Applicant: BASF AG

Inventor： WATZENBERGER OTTO ,  MAUER PETER ,  STROFER ECKHARD ,  SCHELLING HEINER ,  SCHNEIDER HANS-MICHAEL

IPC: C01B21/14

Abstract: An aqueous solution of free hydroxylamine is prepared by treating a hydroxylammonium salt with ammonia by the countercurrent method in a stripping column by a process in which hydroxylamine is liberated and at the same time the solution obtained is separated by distillation into an aqueous hydroxylamine solution and a salt fraction. The novel process can be carried out in a simple and gentle manner and on a large scale. The danger of decomposition is minimized owing to the low thermal load, the low concentration of hydroxylamine and the short residence time in the process.