Catalyst for the selective reduction of nitrogen oxides in waste gases and process for the manufacture of such a catalyst

US4695559A · kind A · utility

Assignees

• Didier-Werke AG · DE
• Didier Engineering GmbH · DE

Inventors

• Dietrich Wagener · Essen, DE
• Karl H. Laue
• Egmar Wunderlich · Pulheim, DE
• Theo Sander · Essen, DE
• Claus Flockenhaus · Essen, DE
• Erich Hackler · Essen, DE
• Biagoje Levkov · Wiesbaden, DE
• Daniel Grimm · Schlangenbad, DE
• Hartmut Kainer · Wiesbaden, DE
• Hermann Stein · Taunusstein, DE
• Hans-Eugen Buhler · Königstein, DE
• Horst Kalfa · Idstein, DE
• Johann Jansen · Duisburg, DE
• Werner Stender · Raesfeld, DE
• Arnold Max · Bottrop, DE

Key dates

• Filing date: Feb 19, 1986
• Grant date: Sep 22, 1987
• Expiry date: Feb 19, 2006

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J23/862
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A catalyst for use with ammonia for the selective reduction of nitrogen oxides in waste gases. The catalyst comprises a mixture of substances which has high activity and selectivity with regard to nitrogen oxide conversion and high sorption capabilities with regard to ammonia, but low oxidation capabilities with regard to sulfur dioxide, ammonia, or similar substances. The invention also provides a process for the manufacture and use of such catalysts.