Catalyst for the selective reduction of nitrogen oxides with ammonia

US4916107A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Reinhold Brand · Hanau, DE
• H. Bernd Engler · Hanau, DE
• Wolfgang Honnen · Bruchköbel, DE
• Peter Kleine-Moellhoff · Alzenau, DE
• Edgar Koberstein · Alzenau, DE

Key dates

• Filing date: Nov 17, 1988
• Grant date: Apr 10, 1990
• Expiry date: Nov 17, 2008

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J23/85
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A catalyst for the selective reduction with ammonia of nitrogen oxides from an intimate mixture of at least 3 metals in the form of their oxides, namely, titanium, tungsten and at least one of the metals vanadium, iron, niobium, molybdenum, with an atomic ratio of Ti to the other metals of 1:0.001 to 1, wherein there is used as oxide of the titanium a product obtained by flame hydrolysis, which product is impregnated with solutions of the salts of the other metals and is dried and calcined at a high temperature.