Catalyst featuring silicone dioxide based support material for the purification of exhaust gases

US7563744B2 · kind B2 · utility

Assignee

• UMICORE AG & CO. KG · DE

Inventors

• Harald Klein · Bessenbach, DE
• Ulrich Neuhausen · Kahl am Main, DE
• Egbert Lox · Hanau, DE
• Jurgen Gieshoff · Bad Orb, DE
• Thomas Kreuzer · Karben, DE

Key dates

• Filing date: Aug 8, 2002
• Grant date: Jul 21, 2009
• Expiry date: Oct 4, 2024

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2235/30
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to a catalyst for the purification of exhaust gases from an internal combustion engine, which comprises a catalytically active coating on an inert ceramic or metal honeycomb body, said coating comprising at least one platinum group metal selected from the group consisting of platinum, palladium, rhodium and iridium on a fine, oxidic support material. As an oxidic support material, the catalyst comprises a low-porosity material on the basis of silicon dioxide that comprises aggregates of essentially spherical primary particles having an average particle diameter of between 7 and 60 nm.