Process utilizing catalytic material for the reduction of nitrous oxides

US4812296A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Helmut Schmelz · Prien am Chiemsee, DE
• Helmut Thomann · Schwalbach am Taunus, DE
• Renate Kuschke · Feldkirchen-Westerham, DE
• Eva-Helga Wilbert · Munich, DE
• Wolfgang Gajewski · Buckenhof, DE
• Josef Sprehe · Erlangen, DE
• Norbert Landgraf · Dietenhofen, DE
• Hans Ranly · Marloffstein, DE
• Lothar Balling · Ergolding, DE
• Richard Reppisch · Herzogenaurach, DE
• Dietmar Hein · Nuremberg, DE

Key dates

• Filing date: Jan 22, 1988
• Grant date: Mar 14, 1989
• Expiry date: Jan 22, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02C20/10
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Catalytic material for reducing nitrous oxides in flue gases in the presence of ammonia in which titanium oxide is used as the starting material and the latter is milled together with vanadium oxide and one or more oxides of the elements tungsten, molybdenum, phosphorus, chromium, copper, iron, uranium and is thereafter subjected to at least one thermal treatment. Tungsten and molybdenum are substituted here entirely or partially by phosphorus in the form of its oxides or phosphates.