US 12,275,001 B2
Exhaust gas purification catalyst
Shunsuke Oishi, Kakegawa (JP); Takaya Ota, Kakegawa (JP); Taku Miura, Kakegawa (JP); Hiromi Togashi, Kakegawa (JP); and Ryosuke Takasu, Kakegawa (JP)
Assigned to Cataler Corporation, Kakegawa (JP)
Appl. No. 17/801,091
Filed by Cataler Corporation, Kakegawa (JP)
PCT Filed Dec. 7, 2020, PCT No. PCT/JP2020/045390
§ 371(c)(1), (2) Date Aug. 19, 2022,
PCT Pub. No. WO2021/166382, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 2020-027925 (JP), filed on Feb. 21, 2020.
Prior Publication US 2023/0078076 A1, Mar. 16, 2023
Int. Cl. B01J 21/04 (2006.01); B01D 53/94 (2006.01); B01J 23/10 (2006.01); B01J 23/42 (2006.01); B01J 23/44 (2006.01); B01J 23/46 (2006.01); B01J 23/63 (2006.01); B01J 35/23 (2024.01); B01J 35/61 (2024.01)
CPC B01J 23/63 (2013.01) [B01D 53/9413 (2013.01); B01D 53/944 (2013.01); B01D 53/945 (2013.01); B01J 21/04 (2013.01); B01J 35/23 (2024.01); B01J 35/613 (2024.01); B01D 2257/40 (2013.01); B01D 2257/50 (2013.01); B01D 2257/702 (2013.01); B01D 2258/01 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An exhaust gas purification catalyst arranged in an exhaust passage of an internal combustion engine for purifying an exhaust gas exhausted from the internal combustion engine,
the exhaust gas purification catalyst comprising:
a base material and
a catalyst layer formed on a surface of the base material,
wherein the catalyst layer includes rare-earth-carrying alumina having a primary particle of a rare-earth particle including at least one rare-earth element carried on a surface of an alumina carrier, and
an average particle diameter D50 based on TEM observation of the rare-earth particle in the rare-earth-carrying alumina is 10 nm or less.