Oxygen storing material with high thermal stability and a process for preparation and use thereof

US6576207B1 · kind B1 · utility

Assignee

• Degussa AG · DE

Inventors

• Lothar Mussmann · Offenbach, DE
• Renee Van Yperen · Wertingen, DE
• Dieter Lindner · Hanau, DE
• Thomas Kreuzer · Karben, DE
• Egbert Lox · Hanau, DE

Key dates

• Filing date: Apr 8, 1998
• Grant date: Jun 10, 2003
• Expiry date: Apr 8, 2018

Classification

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

Abstract

An oxygen storing material with high thermal stability is disclosed which contains cerium oxide and at least one stabilizer from the group praseodymium oxide, lanthanum oxide, yttrium oxide and neodymium oxide, wherein the stabilizer(s) and optionally cerium oxide are present in highly dispersed form on the specific surface area of a high surface area support material from the group aluminum oxide, zirconium oxide, titanium oxide, silicon dioxide, cerium oxide and mixed oxides thereof and the oxygen storing material still has a specific surface area of more than 20, preferably more than 30 m2/g, after calcination in air at 900° C. for a period of 10 hours.