Selective catalytic reduction type catalyst

Details Selective catalytic reduction type catalyst Selective catalytic reduction type catalyst

2011-03-15

2011-03-15

Silverman, Stanley (Department: 1736)

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

Zeolite or clay, including gallium analogs

And additional al or si containing component

C423S213200, C423S213500, C502S064000, C502S065000, C502S067000, C502S069000, C502S073000, C502S074000, C502S527120

Reexamination Certificate

active

07906449

ABSTRACT:
The present invention is a selective catalytic reduction type catalyst for purifying nitrogen oxides in exhaust gas exhausted from lean combustion engines using ammonia or urea as a reducing agent, it is provided with a selective catalytic reduction type catalyst The catalyst comprises a lower-layer catalyst layer (A) having an oxidative function for nitrogen monoxide (NO) in exhaust gas and an upper-layer catalyst layer (B) having an adsorbing function for ammonia on the surface of a monolithic structure type carrier (C), and that the lower-layer catalyst layer (A) comprises a noble metal component (i), an inorganic base material constituent (ii) and zeolite (iii), and the upper-layer catalyst layer (B) comprises substantially none of component (i) but the component (iii).

REFERENCES:
patent: 5376610 (1994-12-01), Takahata et al.
patent: 5409671 (1995-04-01), Takemoto et al.
patent: 5427989 (1995-06-01), Kanesaka et al.
patent: 6967186 (2005-11-01), Takaya et al.
patent: 2001/0053340 (2001-12-01), Noda et al.
patent: 2003/0181316 (2003-09-01), Hiramoto et al.
patent: 2004/0209761 (2004-10-01), Yoshikawa
patent: 1166854 (2002-01-01), None
patent: 3012249 (1989-12-01), None
patent: 10-005591 (1998-01-01), None
patent: 2002-502927 (2002-01-01), None
patent: 2004-524962 (2004-08-01), None
patent: 2005-238195 (2005-09-01), None
patent: WO-98/50151 (1998-11-01), None
patent: WO-2007/137675 (2007-12-01), None
patent: WO-2008/006427 (2008-01-01), None
European Search Report dated Aug. 4, 2008, issued on the corresponding European application.

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