Catalyst in the form of a plate for nitrogen oxide reduction in exhaust gases

US4771026A · kind A · utility

Assignees

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

Inventors

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

Key dates

• Filing date: Sep 1, 1987
• Grant date: Sep 13, 1988
• Expiry date: Sep 1, 2007

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J37/0009
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a catalyst in the form of a plate for nitrogen oxide reduction in exhaust gases manufactured by molding granular Cr.sub.2 O.sub.3 or a mixture of granular Fe.sub.2 O.sub.3 with Cr.sub.2 O.sub.3 with phosphoric acid or sulphuric acid as binder, characterized by the fact that a combination is molded of separately prepared mixtures of Cr.sub.2 O.sub.3 or (Fe.sub.2 O.sub.3 +Cr.sub.2 O.sub.3) with phosphoric acid as binder, and of Cr.sub.2 O.sub.3 or (Fe.sub.2 O.sub.3 +Cr.sub.2 O.sub.3) with sulphuric acid as binder.