US 12,201,940 B2
Exhaust gas purifying catalyst
Shu Miyasaka, Kakegawa (JP); Eriko Tanaka, Kakegawa (JP); Norihiko Aono, Kakegawa (JP); Mai Huong Tran, Kakegawa (JP); Keigo Hori, Kakegawa (JP); and Daisuke Sugioka, Kakegawa (JP)
Assigned to Cataler Corporation, Kakegawa (JP)
Filed by Cataler Corporation, Kakegawa (JP)
Filed on Oct. 25, 2021, as Appl. No. 17/509,453.
Application 17/509,453 is a division of application No. 16/485,513, granted, now 11,202,991, previously published as PCT/JP2018/005691, filed on Feb. 19, 2018.
Claims priority of application No. 2017-029297 (JP), filed on Feb. 20, 2017; and application No. 2017-224344 (JP), filed on Nov. 22, 2017.
Prior Publication US 2022/0040635 A1, Feb. 10, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 53/86 (2006.01); B01D 53/56 (2006.01); B01D 53/92 (2006.01); B01D 53/94 (2006.01); B01J 23/10 (2006.01); B01J 23/72 (2006.01); B01J 23/745 (2006.01); B01J 23/83 (2006.01); B01J 23/847 (2006.01); B01J 29/06 (2006.01); B01J 29/072 (2006.01); B01J 29/076 (2006.01); B01J 29/70 (2006.01); B01J 29/76 (2006.01); B01J 29/78 (2006.01); B01J 29/85 (2006.01); B01J 35/30 (2024.01); B01J 35/40 (2024.01); B01J 37/00 (2006.01); B01J 37/02 (2006.01); B01J 37/30 (2006.01); B01J 23/63 (2006.01); F01N 3/20 (2006.01); F01N 3/28 (2006.01)
CPC B01D 53/86 (2013.01) [B01D 53/56 (2013.01); B01D 53/565 (2013.01); B01D 53/8628 (2013.01); B01D 53/8631 (2013.01); B01D 53/92 (2013.01); B01D 53/9413 (2013.01); B01D 53/9418 (2013.01); B01D 53/945 (2013.01); B01J 23/10 (2013.01); B01J 23/72 (2013.01); B01J 23/745 (2013.01); B01J 23/83 (2013.01); B01J 23/8472 (2013.01); B01J 29/061 (2013.01); B01J 29/072 (2013.01); B01J 29/076 (2013.01); B01J 29/7053 (2013.01); B01J 29/7057 (2013.01); B01J 29/7065 (2013.01); B01J 29/76 (2013.01); B01J 29/7607 (2013.01); B01J 29/7615 (2013.01); B01J 29/763 (2013.01); B01J 29/78 (2013.01); B01J 29/7807 (2013.01); B01J 29/7815 (2013.01); B01J 29/783 (2013.01); B01J 29/85 (2013.01); B01J 35/393 (2024.01); B01J 35/397 (2024.01); B01J 35/40 (2024.01); B01J 37/0009 (2013.01); B01J 37/0201 (2013.01); B01J 37/0215 (2013.01); B01J 37/0234 (2013.01); B01J 37/0246 (2013.01); B01J 37/30 (2013.01); B01D 2255/206 (2013.01); B01D 2255/2063 (2013.01); B01D 2255/20723 (2013.01); B01D 2255/20738 (2013.01); B01D 2255/20761 (2013.01); B01D 2255/50 (2013.01); B01D 2255/502 (2013.01); B01J 23/63 (2013.01); B01J 37/0244 (2013.01); B01J 2229/18 (2013.01); B01J 2229/186 (2013.01); B01J 2229/20 (2013.01); B01J 2229/42 (2013.01); F01N 3/2066 (2013.01); F01N 3/2803 (2013.01); F01N 2370/04 (2013.01); F01N 2510/063 (2013.01); F01N 2510/0684 (2013.01); Y02A 50/20 (2018.01); Y02T 10/12 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An exhaust gas purifying apparatus which is disposed in an exhaust pathway of an internal combustion engine and cleans exhaust gas emitted from the internal combustion engine, the apparatus comprising:
an exhaust gas purifying catalyst comprising a substrate and a catalyst layer formed on a surface of the substrate, and
a reducing agent supply mechanism which supplies a reducing agent for generation of ammonia to the exhaust gas at a position upstream in the exhaust pathway as compared to a position of the exhaust gas purifying catalyst, wherein
the catalyst layer contains zeolite particles that support a metal and that support a rare earth element-containing compound that contains lanthanum (La) as a rare earth element, and
an amount of the rare earth element-containing compound contained is such an amount that a molar ratio of the rare earth element relative to Si contained in the zeolite particles is 0.001 to 0.014 in terms of oxides, wherein
the rare earth element-containing compound is disposed on a surface of the zeolite particles.