US 12,343,706 B2
Exhaust gas purification catalyst
Ryota Onoe, Kakegawa (JP); Ryo Tasaki, Kakegawa (JP); Shunsuke Oishi, Kakegawa (JP); and Koki Aono, Kakegawa (JP)
Assigned to Cataler Corporation, Kakegawa (JP)
Appl. No. 17/788,531
Filed by Cataler Corporation, Kakegawa (JP)
PCT Filed Dec. 7, 2020, PCT No. PCT/JP2020/045389
§ 371(c)(1), (2) Date Jun. 23, 2022,
PCT Pub. No. WO2021/131630, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-239344 (JP), filed on Dec. 27, 2019.
Prior Publication US 2023/0036970 A1, Feb. 2, 2023
Int. Cl. B01J 21/04 (2006.01); B01D 53/94 (2006.01); B01J 21/06 (2006.01); B01J 21/08 (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 35/00 (2006.01); B01J 35/56 (2024.01); F01N 3/10 (2006.01); F01N 3/28 (2006.01)
CPC B01J 23/464 (2013.01) [B01D 53/945 (2013.01); B01J 21/04 (2013.01); B01J 23/10 (2013.01); B01J 35/19 (2024.01); B01J 35/56 (2024.01); F01N 3/101 (2013.01); F01N 3/2828 (2013.01); B01D 2255/1025 (2013.01); B01D 2255/908 (2013.01); B01D 2255/9155 (2013.01); B01D 2255/9202 (2013.01); F01N 2330/06 (2013.01); F01N 2370/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An exhaust gas purifying catalyst comprising:
a wall-flow-type base material and
a catalyst layer formed on the base material,
the base material including:
an entry-side cell that is opened only at an end on an exhaust-gas inflow side,
an exit-side cell that is opened only at an end on an exhaust-gas outflow side, and
a partition wall for separating the entry-side cell and the exit-side cell, the partition wall including a plurality of pores for establishing communication between the entry-side cell and the exit-side cell,
wherein a first catalyst-region, including the catalyst layer formed therein, is provided on a surface of the partition wall that is in contact with the entry-side cell,
wherein a second catalyst-region, including the catalyst layer formed on a wall surface of the pores, is provided in a prescribed region from a surface of the partition wall that is in contact with the exit-side cell toward the entry-side cell, and
wherein a catalyst unformed region, in which the catalyst layer is substantially not formed therein, is provided between the first catalyst-region and the second catalyst-region in a thickness direction of the partition wall.