Method for producing an aqueous hydroxylamine solution devoid of salt

US7029557B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Karl-Heinz Wostbrock · Bad Kötzting, DE
• Joachim Thiel · Neustadt, DE
• Heinz Krüger · Schifferstadt, DE
• Eckhard Ströfer · Mannheim, DE
• Markus Weber · Langenfeld, DE
• Bernd Gerber · Ludwigshafen, DE
• Bernd Rumpf · Hockenheim, DE
• Bernd Sachweh · Meckenheim, DE
• Steffen Kerth · Ludwigshafen, DE

Key dates

• Filing date: Jul 2, 2002
• Grant date: Apr 18, 2006
• Expiry date: Jul 2, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S261/72
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a method for producing a highly pure, aqueous hydroxylamine solution by distilling an aqueous solution, devoid of salt, of a hydroxyl ammonium salt in a plate column comprising at least two mechanical plates. Said method is characterised in that packing bodies are arranged between at least two plates of the plate column over the cross-section of said column.