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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 10143968 B1

PDFFull Text
Date of Patent:
Dec. 04, 2018

Filed:

Dec. 11, 2015

Exhaust gas purifying catalyst

Applicants:

Hiromasa Suzuki, Toyota, JP;

Takeru Yoshida, Miyoshi, JP;

Masahide Miura, Toyota, JP;

Isao Chinzei, Toyota, JP;

Mitsuyoshi Okada, Toyota, JP;

Toshitaka Tanabe, Nagakute, JP;

Akihiko Suda, Nagakute, JP;

Hirotaka Ori, Kakgawa, JP;

Akiya Chiba, Shizuoka, JP;

Kosuke Iizuka, Kakegawa, JP;

Akira Morikawa, Nagakute, JP;

Inventors:

Hiromasa Suzuki, Toyota, JP;

Takeru Yoshida, Miyoshi, JP;

Masahide Miura, Toyota, JP;

Isao Chinzei, Toyota, JP;

Mitsuyoshi Okada, Toyota, JP;

Toshitaka Tanabe, Nagakute, JP;

Akihiko Suda, Nagakute, JP;

Hirotaka Ori, Kakgawa, JP;

Akiya Chiba, Shizuoka, JP;

Kosuke Iizuka, Kakegawa, JP;

Akira Morikawa, Nagakute, JP;

Assignees:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi, JP;

CATALER CORPORATION, Kakegawa-shi, Shizuoka, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Timothy C Vanoy

Int. Cl.
CPC ...
B01J 23/38 (2006.01); B01J 23/40 (2006.01); B01J 23/42 (2006.01); B01J 23/44 (2006.01); B01J 23/63 (2006.01); B01J 23/10 (2006.01); B01J 35/00 (2006.01); B01D 53/94 (2006.01); B01J 37/02 (2006.01); B01J 37/03 (2006.01); C04B 35/488 (2006.01);
U.S. Cl.
CPC ...
B01D 53/945 (2013.01); B01J 37/0244 (2013.01); B01J 37/038 (2013.01); C04B 35/488 (2013.01); C04B 2235/3229 (2013.01); C04B 2235/443 (2013.01); C04B 2235/76 (2013.01);
Abstract

The object of the present invention is to provide a high-performance exhaust gas purifying catalyst that can achieve oxygen absorption/release capacity and NOx purification performance. The object is solved by an exhaust gas purifying catalyst, which comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure in the upstream part of the catalyst coating layer, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % of the total cation amount, and has a molar ratio of (cerium+the additional element):(zirconium) of 43:57 to 48:52.

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