Preparation of aqueous solutions of hydroxylammonium carbonate

US4601800A · kind A · utility

Assignee

• BASF SE

Inventors

• Franz-Josef Weiss · Schifferstadt, DE
• Wolfgang Habermann
• Peter Hammes · Ruppertsberg, DE
• Josef Ritz · Ludwigshafen, DE
• Erwin Thomas · Freinsheim, DE
• Peter Thoma · Mannheim, DE

Key dates

• Filing date: Dec 24, 1984
• Grant date: Jul 22, 1986
• Expiry date: Dec 24, 2004

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D61/44
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Aqueous solutions of hydroxylammonium carbonate are prepared from aqueous hydroxylammonium salt solutions by electrodialysis by a method in which the aqueous hydroxylammonium salt solution is fed into the middle zone of an electrolysis cell, which is divided into a cathode zone, an anode zone and a middle zone by means of semipermeable membranes, and is electrolyzed, and the catholyte used is an aqueous solution of an ammonium carbonate or an alkali metal carbonate or of one of the corresponding bicarbonates.