Method of treating vehicle exhaust gas and catalyst used therein

US4140749A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Detlef Baresel · Stuttgart, DE
• Peter Scharner · Leonberg, DE
• Gerhard Huth · Stuttgart, DE

Key dates

• Filing date: Jun 8, 1977
• Grant date: Feb 20, 1979
• Expiry date: Jun 8, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention provides a catalyst for converting the noxous CO, NO.sub.x and hydrocarbons found in the exhaust gases from internal combustion engines into less harmful gases, and to the method of treating said exhaust gases. The catalyst consists essentially of a solid solution of Fe.sub.2 O.sub.3, Cr.sub.2 O.sub.3, and Fe.sub.3 O.sub.4. The catalyst may be extended on a porous carrier such as aluminum oxide or aluminum silicate. The catalyst is particularly suited for treating the exhaust gas from internal combustion engines of motor vehicles.