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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 10576420 B1

PDFFull Text
Date of Patent:
Mar. 03, 2020

Filed:

Dec. 11, 2015

Exhaust gas purifying catalyst

Applicants:

Isao Chinzei, Toyota, JP;

Hiromasa Suzuki, Toyota, JP;

Takeru Yoshida, Miyoshi, JP;

Masahide Miura, Toyota, JP;

Yuki Aoki, Seto, JP;

Mitsuyoshi Okada, Toyota, JP;

Toshitaka Tanabe, Nagakute, JP;

Akihiko Suda, Nagakute, JP;

Yoshinori Saito, Kakegawa, JP;

Hirotaka Ori, Kakegawa, JP;

Kosuke Iizuka, Kakegawa, JP;

Akira Morikawa, Nagakute, JP;

Inventors:

Isao Chinzei, Toyota, JP;

Hiromasa Suzuki, Toyota, JP;

Takeru Yoshida, Miyoshi, JP;

Masahide Miura, Toyota, JP;

Yuki Aoki, Seto, JP;

Mitsuyoshi Okada, Toyota, JP;

Toshitaka Tanabe, Nagakute, JP;

Akihiko Suda, Nagakute, JP;

Yoshinori Saito, Kakegawa, JP;

Hirotaka Ori, Kakegawa, JP;

Kosuke Iizuka, Kakegawa, JP;

Akira Morikawa, Nagakute, JP;

Assignees:

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

CATALER CORPORATION, Kakegawa-shi, Shizuoka, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Phutthiwat Wongwian

Assistant Examiner:

Diem T Tran

Int. Cl.
CPC ...
B01D 53/94 (2006.01); B01J 23/00 (2006.01); F01N 3/10 (2006.01); C01G 25/02 (2006.01); B01J 23/10 (2006.01); B01J 23/63 (2006.01); B01J 35/00 (2006.01); B01J 35/10 (2006.01); B01J 37/00 (2006.01); B01J 37/02 (2006.01); B01J 37/03 (2006.01); C01F 17/00 (2020.01); B01J 37/08 (2006.01); B01J 35/02 (2006.01); B01J 27/053 (2006.01);
U.S. Cl.
CPC ...
B01D 53/945 (2013.01); B01J 23/002 (2013.01); B01J 23/10 (2013.01); B01J 23/63 (2013.01); B01J 35/002 (2013.01); B01J 35/0006 (2013.01); B01J 35/1009 (2013.01); B01J 37/009 (2013.01); B01J 37/0244 (2013.01); B01J 37/0248 (2013.01); B01J 37/03 (2013.01); C01F 17/0043 (2013.01); C01G 25/02 (2013.01); F01N 3/101 (2013.01); B01D 2255/1021 (2013.01); B01D 2255/1025 (2013.01); B01D 2255/2042 (2013.01); B01D 2255/2063 (2013.01); B01D 2255/2066 (2013.01); B01D 2255/2092 (2013.01); B01D 2255/407 (2013.01); B01D 2255/902 (2013.01); B01D 2255/908 (2013.01); B01J 27/053 (2013.01); B01J 35/023 (2013.01); B01J 37/08 (2013.01); B01J 2523/00 (2013.01); C01P 2002/36 (2013.01); C01P 2002/50 (2013.01); C01P 2002/74 (2013.01); C01P 2004/61 (2013.01); F01N 2510/06 (2013.01); F01N 2570/24 (2013.01); Y02T 10/22 (2013.01);
Abstract

The object of the present invention is to provide an exhaust gas purifying catalyst that can achieve high purification performance while suppressing HS emissions. The object is solved by an exhaust gas purifying catalyst in which the lower layer of the catalyst coating layer comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure, 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 % in relation to the total cation amount, and the molar ratio of (cerium+additional element):(zirconium) is within the range from 43:57 to 48:52.

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