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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 11504700 B1

PDFFull Text
Date of Patent:
Nov. 22, 2022

Filed:

Apr. 09, 2018

Exhaust gas purification catalyst

Applicant:

Cataler Corporation, Kakegawa, JP;

Inventors:

Shunsuke Oishi, Kakegawa, JP;

Shogo Kawamura, Kakegawa, JP;

Takahiro Nagata, Kakegawa, JP;

Hirotaka Ori, Kakegawa, JP;

Minoru Itou, Kakegawa, JP;

Assignee:

Cataler Corporation, Kakegawa, JP;

Attorney:

Occhiuti & Rohlicek LLP

Primary Examiner:

Cam N Nguyen

Int. Cl.
CPC ...
B01J 21/04 (2006.01); B01J 21/06 (2006.01); B01J 21/08 (2006.01); B01J 21/10 (2006.01); B01J 21/12 (2006.01); B01J 23/02 (2006.01); B01J 23/42 (2006.01); B01J 23/44 (2006.01); B01J 23/46 (2006.01); B01J 23/58 (2006.01); B01J 35/00 (2006.01); B01J 35/04 (2006.01); B01J 37/02 (2006.01); B01J 37/08 (2006.01); B01J 27/053 (2006.01); B01D 53/94 (2006.01); F01N 3/28 (2006.01);
U.S. Cl.
CPC ...
B01J 27/053 (2013.01); B01D 53/944 (2013.01); B01D 53/9413 (2013.01); B01D 53/9468 (2013.01); B01J 23/464 (2013.01); B01J 35/0006 (2013.01); B01J 35/04 (2013.01); B01J 37/0228 (2013.01); B01J 37/0236 (2013.01); B01J 37/086 (2013.01); F01N 3/2839 (2013.01); B01D 2255/1023 (2013.01); B01D 2255/1025 (2013.01); B01D 2255/2042 (2013.01); B01D 2255/908 (2013.01); B01D 2255/9022 (2013.01);
Abstract

The present invention provides an exhaust gas purification catalyst including an alkaline earth metal supported in a highly dispersed state on a porous carrier. A catalyst layer of the exhaust gas purification catalyst provided by the invention has an alkaline earth metal-supporting region including a porous carrier, a catalyst metal belonging to the platinum group, and a sulfate of at least one type of alkali earth metal supported on the porous carrier. In a cross-section of this region, a Pearson correlation coefficient Ris at least 0.5 as calculated using α and β for each pixel obtained by carrying out area analysis by FE-EPMA under conditions of pixel size of 0.34 μm×0.34 μm, and measured pixel number 256×256, and by measuring the characteristic X-ray intensity (α:cps) of the alkaline earth metal element (Ae) and the characteristic X-ray intensity (β:cps) of the main constituent element of the inorganic compound constituting the porous carrier for each pixel.

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