Method for catalytically coating ceramic honeycomb bodies

US8278236B2 · kind B2 · utility

Assignee

• UMICORE AG & CO. KG · DE

Inventors

• Marcus Pfeifer · Mannheim, DE
• Paul Spurk · Weiterstadt, DE
• Markus Koegel · Brohl, DE
• Egbert Lox · Hanau, DE
• Thomas Kreuzer · Karben, DE

Key dates

• Filing date: Nov 22, 2006
• Grant date: Oct 2, 2012
• Expiry date: Dec 27, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24157
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a process for coating ceramic honeycomb bodies with a coating suspension containing, in a carrier liquid, catalyst components as solids and/or in dissolved form. The honeycomb bodies have parallel flow channels running through them. The walls of the flow channels generally have an open pore structure. To coat the channel walls and in particular also the interior surfaces of the pores with the coating suspension, it is proposed that the flow channels be temporarily alternately closed and the coating suspension be forced through the open pore structure of the channel walls. The coating is subsequently dried and calcined. To close the flow channels, it is possible to use thermally or chemically decomposable or soluble compositions which are decomposed or dissolved either during calcination or by means of a subsequent chemical treatment. The coated honeycomb bodies are preferably used for the purification of exhaust gases from automobiles.