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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 9339794 B1

PDFFull Text
Date of Patent:
May. 17, 2016

Filed:

May. 28, 2013

Catalyst composition for exhaust gas purification and exhaust gas purifying catalyst for automobiles

Applicant:

N.e. Chemcat Corporation, Tokyo, JP;

Inventor:

Ken Nagashima, Shizuoka, JP;

Assignee:

N.E. CHEMCAT CORPORATION, Tokyo, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Cam N Nguyen

Int. Cl.
CPC ...
B01J 23/00 (2006.01); B01J 23/02 (2006.01); B01J 23/08 (2006.01); B01J 23/10 (2006.01); B01J 23/40 (2006.01); B01J 23/42 (2006.01); B01J 23/44 (2006.01); B01J 23/56 (2006.01); B01J 21/04 (2006.01); B01J 23/63 (2006.01); B01J 37/02 (2006.01); B01J 35/02 (2006.01); B01D 53/94 (2006.01); B01J 23/46 (2006.01);
U.S. Cl.
CPC ...
B01J 23/63 (2013.01); B01D 53/945 (2013.01); B01J 35/023 (2013.01); B01J 37/0244 (2013.01); B01D 2255/1021 (2013.01); B01D 2255/1023 (2013.01); B01D 2255/1025 (2013.01); B01D 2255/2092 (2013.01); B01D 2255/407 (2013.01); B01D 2255/9022 (2013.01); B01D 2255/9202 (2013.01); B01D 2255/9207 (2013.01); B01D 2258/014 (2013.01); B01J 23/464 (2013.01); B01J 2523/00 (2013.01); Y02T 10/22 (2013.01);
Abstract

The present invention is to provide a catalyst composition for exhaust gas purification, which is superior in purification performance for nitrogen oxides (NO), carbon monoxide (CO) and hydrocarbons (HC) in exhaust gas to be discharged from an internal combustion engine of a gasoline vehicle or the like; and an catalyst for exhaust gas purification for automobiles. The present invention is a catalyst composition for exhaust gas purification for purifying nitrogen oxides, carbon monoxide, and hydrocarbons in exhaust gas, which includes a catalyst composition wherein rhodium is supported, together with an α-alumina particle, on a zirconia-type base material, characterized in that average particle size of the α-alumina particle is 10 nm to 1 μm, and also is smaller than average particle size of the zirconia (ZrO)-type base material.

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