Title:
セラミックハニカム体を触媒により被覆する方法
Document Type and Number:
Japanese Patent JP2009521303
Kind Code:
A
Abstract:
In the application of a catalytic washcoat to an automotive ceramic catalytic converter with a honeycomb structure, the pore inlets and outlets are opened and closed alternately at the end-faces. The catalytic washcoat flows from the inlet to the outlet prior to flow reversal. The washcoat is driven through the honeycomb either by suction or pump action. Alternatively, the catalytic converter is dunked in a washcoat bath, or doused with washcoat. Alternatively, the inlet/outlet pores are closed with a wax plug that is solid at the normal honeycomb processing temperature, and which melts or evaporates at higher temperatures, or is removed by a solvent. The wax melts at above 80[deg]C. The honeycomb body porosity is 30-90 and has a median pore diameter of 10-50 m. The washcoat concentration is 240 g/l.
Inventors:
Marx Pfeiffer
Paul Spruku
Marx Kegel
Egbert S. Yacht. Rocks
Thomas Kreuzer
Paul Spruku
Marx Kegel
Egbert S. Yacht. Rocks
Thomas Kreuzer
Application Number:
JP2008546160A
Publication Date:
June 04, 2009
Filing Date:
November 22, 2006
Export Citation:
Assignee:
Umicore AG & Co.KG
International Classes:
B01J37/02; B01J23/30; F01N3/02; F01N3/28
Domestic Patent References:
| JPH11314041A | 1999-11-16 | |||
| JP2002173381A | 2002-06-21 |
Foreign References:
| WO2005044422A1 | 2005-05-19 |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Hiroshi Sugimoto
Kimihiro Hoshi
Hiroyasu Ninomiya
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Hiroshi Sugimoto
Kimihiro Hoshi
Hiroyasu Ninomiya
Einzel Felix-Reinhard
Reinhard Einsel