公开(公告)号：US11179701B2

公开(公告)日：2021-11-23

申请号：US16086869

申请日：2017-03-09

申请人： CATALER CORPORATION

发明人： Yu Sakurada ,  Takahiro Harada ,  Ryota Nakashima

IPC分类号： B01J23/63 ,  B01J37/04 ,  B01J37/08 ,  B01J35/00 ,  B01D53/94 ,  F01N3/20

摘要： An exhaust gas purifying catalyst having first carrier particles, second carrier particles, and precious metal catalyst particles supported on the first and second carrier particles, wherein: the first carrier particles contain ceria, zirconia, and a rare-earth oxide other than ceria; the second carrier particles contain a rare-earth oxide other than ceria, and may contain ceria and zirconia; the contained proportion of ceria and zirconia in the first carrier particles is higher than the contained proportion of ceria and zirconia in the second carrier particles; the contained proportion of the rare-earth oxide in the second carrier particles is higher than the contained proportion of the rare-earth oxide in the first carrier particles; and the contained proportion of ceria in the first carrier particles is 45 wt % or less, while the precious metal catalyst particles include rhodium particles.

公开(公告)号：US09849443B2

公开(公告)日：2017-12-26

申请号：US15102653

申请日：2014-12-09

申请人： CATALER CORPORATION

发明人： Takahiro Harada ,  Keiichi Narita ,  Michio Tanaka ,  Hironobu Kunioku ,  Ryota Nakashima

IPC分类号： B01J23/63 ,  B01D53/94 ,  B01J37/02 ,  B01J21/06 ,  B01J35/10 ,  B01J21/04 ,  B01J35/04 ,  F01N3/28 ,  F01N3/10

CPC分类号： B01J23/63 ,  B01D53/945 ,  B01D2255/10 ,  B01D2255/9022 ,  B01D2255/9025 ,  B01D2255/9032 ,  B01D2255/908 ,  B01D2255/9202 ,  B01D2255/9207 ,  B01J21/04 ,  B01J21/066 ,  B01J35/04 ,  B01J35/1014 ,  B01J35/1019 ,  B01J37/0244 ,  F01N3/101 ,  F01N3/2803 ,  F01N2510/0682 ,  F01N2510/0684 ,  Y02T10/22

摘要： Provided is an exhaust gas purification catalyst with excellent durability against exhaust gas including a poisoning substance. The exhaust gas purification catalyst includes a porous substrate, a catalyst coating layer formed on the porous substrate, and a dummy coating layer formed on the outermost surface of the catalyst coating layer. The catalyst coating layer has a carrier and a noble metal catalyst supported on the carrier. The dummy coating layer includes a carrier having at least alumina and does not include a noble metal catalyst. The dummy coating layer is formed to have a length which, from the end on the exhaust gas inlet side, is 10% to 70% of the entire length of the catalyst coating layer along the exhaust gas flow direction.

公开(公告)号：US11110435B2

公开(公告)日：2021-09-07

申请号：US16086083

申请日：2017-03-13

申请人： CATALER CORPORATION

发明人： Ryota Onoe ,  Kazuhiko Ito ,  Takahiro Harada ,  Chihiro Kasuya

IPC分类号： B01J23/10 ,  B01J23/44 ,  B01J35/00 ,  B01J35/04 ,  F01N3/28 ,  B01J23/46 ,  B01D53/94

摘要： An exhaust gas purification catalyst comprises a substrate; a catalyst layer formed on the substrate and containing at least palladium (Pd) and rhodium (Rh) as a metal functioning as an oxidation and/or reduction catalyst. The catalyst also comprises a carrier that supports the metal, and an OSC material having oxygen storage capacity. The catalyst layer has, when disposed in the exhaust pipe, a front section positioned upstream in an exhaust gas flow direction within the exhaust pipe, and a rear section positioned downstream of the front section in the exhaust gas flow direction. The front section contains palladium (Pd) but does not contain the OSC material, and a proportion, at which the front section is formed from an upstream leading end in the exhaust gas flow direction, is 10% to 40% with respect to 100% of a total length of the substrate.