Title:
EXHAUST GAS PURIFICATION CATALYST
Document Type and Number:
WIPO Patent Application WO/2008/004385
Kind Code:
A1
Abstract:
An exhaust gas purification catalyst which is little deteriorated in activity even in a high-temperature atmosphere containing oxygen in a high concentration. This catalyst contains a double oxide catalyst containing the first solid solution consisting of a double oxide and Pd or the second solid solution consisting of a double oxide and Rh and/or Pt. The double oxides constituting the first and second solid solutions have perovskite structure and are represented by ABO3 and CDO3 respectively.The double oxide catalyst is supported by a double oxide carrier containing either a double oxide of spinel structure represented by EF2O4 or a double oxide represented by GAl12O19. A and B represent a rare earth element and a transition element respectively, while C and G are each an alkaline earth element. D is one or more of Ti, Zr, Hf and Ce, while E is an alkaline earth element and/or a transition element and F is at least one of Al, Mg, and transition elements.
Inventors:
MATSUEDA SATOSHI (JP)
KIMURA MAREO (JP)
HIRAI AKIMASA (JP)
NARITA KEIICHI (JP)
TANAKA HIROHISA (JP)
TAN ISAO (JP)
UENISHI MARI (JP)
TANIGUCHI MASASHI (JP)
KIMURA MAREO (JP)
HIRAI AKIMASA (JP)
NARITA KEIICHI (JP)
TANAKA HIROHISA (JP)
TAN ISAO (JP)
UENISHI MARI (JP)
TANIGUCHI MASASHI (JP)
Application Number:
PCT/JP2007/060913
Publication Date:
January 10, 2008
Filing Date:
May 29, 2007
Export Citation:
Assignee:
CATALER CORP (JP)
DAIHATSU MOTOR CO LTD (JP)
MATSUEDA SATOSHI (JP)
KIMURA MAREO (JP)
HIRAI AKIMASA (JP)
NARITA KEIICHI (JP)
TANAKA HIROHISA (JP)
TAN ISAO (JP)
UENISHI MARI (JP)
TANIGUCHI MASASHI (JP)
DAIHATSU MOTOR CO LTD (JP)
MATSUEDA SATOSHI (JP)
KIMURA MAREO (JP)
HIRAI AKIMASA (JP)
NARITA KEIICHI (JP)
TANAKA HIROHISA (JP)
TAN ISAO (JP)
UENISHI MARI (JP)
TANIGUCHI MASASHI (JP)
International Classes:
B01D53/94; B01J23/89; B01J23/58; B01J32/00
Domestic Patent References:
| WO2005058490A1 | 2005-06-30 |
Foreign References:
| JP2004243305A | 2004-09-02 | |||
| JP2006131457A | 2006-05-25 | |||
| JP2006021091A | 2006-01-26 | |||
| JP2000189799A | 2000-07-11 | |||
| JP3377676B2 | 2003-02-17 | |||
| JP2004041866A | 2004-02-12 |
Other References:
NAITO K. ET AL.: "Development of a Rh-Intelligent Catalyst", SAE TECHNICAL PAPER SERIES (SOCIETY OF AUTOMATIVE ENGINEERS), April 2006 (2006-04-01), pages 1 - 8, XP003020570
TANAKA H. ET AL.: "LaFePdO3 perovskite automotive catalyst having a self-regenerative function", JOURNAL OF ALLOYS AND COMPOUNDS, vol. 408-412, February 2006 (2006-02-01), pages 408 - 412, XP005264292
See also references of EP 2039426A4
TANAKA H. ET AL.: "LaFePdO3 perovskite automotive catalyst having a self-regenerative function", JOURNAL OF ALLOYS AND COMPOUNDS, vol. 408-412, February 2006 (2006-02-01), pages 408 - 412, XP005264292
See also references of EP 2039426A4
Attorney, Agent or Firm:
SUZUYE, Takehiko et al. (1-12-9 Toranomo, Minato-kuTokyo 01, JP)
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