Catalyst for purifying exhaust gas

Details Catalyst for purifying exhaust gas Catalyst for purifying exhaust gas

2007-07-20

2010-12-07

Nguyen, Cam N (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S261000, C502S262000, C502S304000, C502S326000, C502S332000, C502S333000, C502S334000, C502S339000, C502S349000, C502S350000, C502S351000, C502S415000, C502S439000, C502S527190

Reexamination Certificate

active

07846865

ABSTRACT:
In the present invention, it is an assignment to optimize a loading density of noble metal on catalyst.Pt is loaded in such an amount that a loading amount per 1 liter of a support substrate exceeds 0.75 g on an exhaust-gas upstream side of a coating layer, and a loading density of Rh in the coating layer is made so that it becomes higher on an exhaust-gas downstream side than on the exhaust-gas upstream side. The purifying performance after warming up improves by loading Rh with high density on the exhaust-gas downstream side that is likely to become rich atmosphere.

REFERENCES:
patent: 5376610 (1994-12-01), Takahata et al.
patent: 5459119 (1995-10-01), Abe et al.
patent: 5525307 (1996-06-01), Yasaki et al.
patent: 5556825 (1996-09-01), Shelef et al.
patent: 5597771 (1997-01-01), Hu et al.
patent: 5948377 (1999-09-01), Sung
patent: 5989507 (1999-11-01), Sung et al.
patent: 6047544 (2000-04-01), Yamamoto et al.
patent: 6087298 (2000-07-01), Sung et al.
patent: 6335305 (2002-01-01), Suzuki et al.
patent: 6375910 (2002-04-01), Deeba et al.
patent: 6634168 (2003-10-01), Yamamoto
patent: 6667018 (2003-12-01), Noda et al.
patent: 6764665 (2004-07-01), Deeba et al.
patent: 6777370 (2004-08-01), Chen
patent: 6806225 (2004-10-01), Ikeda et al.
patent: 6846466 (2005-01-01), Matsumoto et al.
patent: 6881384 (2005-04-01), Uenishi et al.
patent: 6967186 (2005-11-01), Takaya et al.
patent: 7045483 (2006-05-01), Noda et al.
patent: 7056859 (2006-06-01), Hachisuka
patent: 7071141 (2006-07-01), Gandhi et al.
patent: 7204965 (2007-04-01), Okawara et al.
patent: 7276212 (2007-10-01), Hu et al.
patent: 7374729 (2008-05-01), Chen et al.
patent: 7524465 (2009-04-01), Kumar et al.
patent: 7576031 (2009-08-01), Beutel et al.
patent: 7585478 (2009-09-01), Shirahata et al.
patent: 7737077 (2010-06-01), Kitamura et al.
patent: 2006/0270550 (2006-11-01), Shimizu et al.
patent: 2008/0044330 (2008-02-01), Chen et al.
patent: 2008/0081761 (2008-04-01), Suzuki
patent: 0 566 401 (1993-10-01), None
patent: 0 622 107 (1994-11-01), None
patent: 63-168032 (1988-11-01), None
patent: 5-293376 (1993-11-01), None
patent: 6-198181 (1994-07-01), None
patent: 8-332350 (1996-12-01), None
patent: 10-174866 (1998-06-01), None
patent: 2001-252565 (2001-09-01), None
patent: 2004-16931 (2004-01-01), None
patent: 2004-181374 (2004-07-01), None
patent: 2006-231204 (2006-09-01), None
patent: 2007-38072 (2007-02-01), None
patent: WO 2007/015387 (2007-02-01), None

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