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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9011809 B1

PDFFull Text
Date of Patent:
Apr. 21, 2015

Filed:

Feb. 24, 2012

Ammonia oxidation catalyst, exhaust gas purification device using same, and exhaust gas purification method

Applicants:

Tomoaki Ito, Shizuoka, JP;

Toshinori Okajima, Shizuoka, JP;

Takashi Hihara, Shizuoka, JP;

Makoto Nagata, Shizuoka, JP;

Inventors:

Tomoaki Ito, Shizuoka, JP;

Toshinori Okajima, Shizuoka, JP;

Takashi Hihara, Shizuoka, JP;

Makoto Nagata, Shizuoka, JP;

Assignee:

N.E. Chemcat Corporation, Tokyo, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Cam N Nguyen

Int. Cl.
CPC ...
B01D 53/56 (2006.01); B01D 53/86 (2006.01); B01J 8/00 (2006.01); C01B 21/00 (2006.01); B01J 29/00 (2006.01); B01J 29/06 (2006.01); B01J 21/00 (2006.01); B01J 21/04 (2006.01); B01J 23/00 (2006.01); B01J 23/02 (2006.01); B01J 23/10 (2006.01); B01J 23/40 (2006.01); B01J 23/42 (2006.01); B01J 23/56 (2006.01); B01J 20/00 (2006.01); B01D 50/00 (2006.01); B01D 53/34 (2006.01); B01J 29/88 (2006.01); B01D 53/94 (2006.01); B01J 23/63 (2006.01); B01J 37/02 (2006.01); B01J 35/00 (2006.01); B01J 21/06 (2006.01); B01J 21/08 (2006.01); B01J 23/44 (2006.01); B01J 29/72 (2006.01); B01J 35/04 (2006.01);
U.S. Cl.
CPC ...
B01J 29/88 (2013.01); Y02C 20/10 (2013.01); B01D 53/9436 (2013.01); B01D 53/9477 (2013.01); B01D 2255/1021 (2013.01); B01D 2255/2065 (2013.01); B01D 2255/20707 (2013.01); B01D 2255/20715 (2013.01); B01D 2255/20776 (2013.01); B01D 2255/30 (2013.01); B01D 2255/40 (2013.01); B01D 2255/407 (2013.01); B01D 2255/9022 (2013.01); B01D 53/945 (2013.01); B01J 23/63 (2013.01); B01J 37/0244 (2013.01); B01J 35/0006 (2013.01); B01J 21/04 (2013.01); B01J 21/063 (2013.01); B01J 21/08 (2013.01); B01J 23/42 (2013.01); B01J 23/44 (2013.01); B01J 29/7215 (2013.01); B01J 35/04 (2013.01); Y10S 502/52712 (2013.01); Y10S 502/52713 (2013.01);
Abstract

An ammonia oxidation catalyst being superior in heat resistance and capable of suppressing by-production of NO or NO. The ammonia oxidation catalyst is made by coating at least two catalyst layers having a catalyst layer (lower layer) including a catalyst supported a noble metal on an inorganic base material including any of a composite oxide (A) having at least titania and silica as main components, alumina, and a composite oxide (B) consisting of alumina and silica; and a catalyst layer (upper layer) including a composite oxide (C) consisting of at least silica, tungsten oxide, ceria and zirconia, at the surface of an integral structure-type substrate, wherein a composition of the composite oxide (C) is silica: 20% by weight or less, tungsten oxide: 1 to 50% by weight, ceria: 1 to 60% by weight, and zirconia: 30 to 90% by weight.

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