Process for the reduction of concentration of nitrates and/or nitrogen-containing compounds by means of SO2

US6761828B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Jürgen Heuser · Krefeld, DE
• Werner Verhoeven · Kalmthout, BE
• Domien Sluyts · Stabroek, BE
• Gabriel Denecker · Kalmthout, BE

Key dates

• Filing date: Mar 13, 2002
• Grant date: Jul 13, 2004
• Expiry date: Nov 8, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/903
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

Nitrate-containing (contaminated) solutions are reduced with SO2 gas in the presence of an at least equimolar amount of NH4+ or ammonium salt.