Process for the purification of exhaust gases containing oxides of nitrogen and sulfur

US4744967A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Reinhold Brand · Hanau, DE
• Bernd Engler · Hanau, DE
• Peter Kleine-Moellhoff · Alzenau, DE
• Edgar Koberstein · Alzenau, DE
• Herbert Voelker · Hanau, DE

Key dates

• Filing date: Jan 20, 1987
• Grant date: May 17, 1988
• Expiry date: Jan 20, 2007

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F23J2219/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process is described for the purification of exhaust gases containing oxides of nitrogen and sulfur obtained from combustion installations and industrial production processes by selective catalytic reduction of the nitric oxides with ammonia, subsequent catalytic oxidation of sulfur dioxide with oxygen and conversion into sulfuric acid of the sulfur trioxide obtained.