Oxygen storage material, process for its preparation and its application in a catalyst

US7485599B2 · kind B2 · utility

Assignee

• UMICORE AG & CO. KG · DE

Inventors

• Mamoun Muhammed · Djursholm, SE
• Othon Adamopoulos · Stockholm, SE
• Tassilo Bog · Hanau, DE
• Lothar Mussmann · Offenbach, DE
• Dieter Lindner · Hanau, DE
• Martin Votsmeier · Bruchköbel, DE
• Matthias Feger · Darmstadt, DE
• Egbert Lox · Hanau, DE
• Thomas Kreuzer · Karben, DE

Key dates

• Filing date: Apr 9, 2007
• Grant date: Feb 3, 2009
• Expiry date: Apr 9, 2027

Classification

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

Abstract

An oxygen storage material comprising cerium oxide and at least one second oxide of a metal M1 is disclosed as well as a process for manufacturing the material and the use of this material in an exhaust gas cleaning catalyst. In a preferred embodiment the oxygen storage material comprises particles from a Ce/M1 mixed oxide solid solution coated with an oxide of another metal M2. Metal M1 e.g. can be calcium or zirconium while metal M2 most preferably is aluminum.