Catalyst plate

US4742036A · kind A · utility

Assignee

• Didier-Werke AG · DE

Inventors

• Claus Flockenhaus · Essen, DE
• Daniel Grimm · Schlangenbad, DE
• Hartmut Kainer · Wiesbaden, DE
• Karl H. Laue

Key dates

• Filing date: Sep 5, 1986
• Grant date: May 3, 1988
• Expiry date: Sep 5, 2006

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J23/745
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to catalyst plates for reducing nitrogen oxide in exhaust gases. These plates are molded of granular Fe.sub.2 O.sub.3 catalyst material and a binder. To achieve high activity and strength in the plates, these are molded of a combination of a first mixture comprised of Fe.sub.2 O.sub.3 catalyst material and phosphoric acid as binder, and a second, separately-produced mixture comprised of Fe.sub.2 O.sub.3 catalyst material and sulphuric acid as binder. The plates can also be a molding having layers, which layers have alternate layers of the first and second mixtures.