Method for the production of a salt-free aqueous hydroxylamine solution

US6942762B2 · 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: Sep 13, 2005
• 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

A process for preparing a salt-free aqueous hydroxylamine solution by distilling an aqueous solution of a hydroxylammonium salt and a base in a tray column having at least two mechanical trays, wherein random or structured packings are located above at least one tray of the tray column over the cross section of the column.