Cerium oxide powder

US7264787B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Stipan Katusic · Bad Soden, DE
• Stefan Heberer · Gelnhausen, DE
• Michael Kraemer · Nidderau, DE
• Peter Kress · Alzenau, DE
• Michael Kroell · Gelnhausen, DE
• Edwin Staab · Geiselbach, DE

Key dates

• Filing date: Jul 12, 2004
• Grant date: Sep 4, 2007
• Expiry date: Dec 5, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S977/811
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Polycrystalline cerium oxide powder in the form of aggregates of primary particles with a specific surface of between 70 and 150 m2/g, an average primary particle diameter of between 5 and 20 nm and an average, projected aggregate diameter of between 20 and 100 nm. It is produced in that an aerosol is reacted in a flame obtained from a hydrogen-containing combustible gas and primary air and the solid obtained is then separated from the gaseous substances.