Method for introducing a catalytic coating into the pores of a ceramic honeycomb flow body

US8491966B2 · kind B2 · utility

Assignee

• UMICORE AG & CO. KG · DE

Inventor

• Wolfgang Hasselmann · Rheinfelden (Baden), DE

Key dates

• Filing date: Mar 18, 2008
• Grant date: Jul 23, 2013
• Expiry date: Mar 8, 2030

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B05D7/22
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Disclosed herein is a process for coating ceramic honeycomb bodies with a catalyst suspension comprising catalyst components as solids and/or in dissolved form in a carrier liquid. Parallel flow channels run through the honeycomb bodies. The walls of the flow channels have an open pore structure. To coat the channel walls and in particular also the interior surfaces of the pores with the catalyst suspension, the entry and exit end faces of the vertically aligned honeycomb bodies are each brought into contact with a perforated mask, with the perforated masks being arranged so that the open regions of the perforated mask on the one end face are opposite the closed regions of the perforated mask on the other end face and vice versa. The catalyst suspension is then pumped or sucked from below into the honeycomb bodies until it exits at the upper end face. Excess suspension is then removed by blowing-out or sucking-out, the contact with the perforated masks is released and the honeycomb body is calcined to fix the coating.