公开(公告)号：US20240009621A1

公开(公告)日：2024-01-11

申请号：US18025993

申请日：2021-08-30

Applicant: Cataler Corporation

Inventor： Taku Miura ,  Takashi Goto ,  Kenichi Taki ,  Shingo Sakagami

IPC: B01D53/94 ,  B01J23/46 ,  B01J23/44 ,  B01J35/00 ,  B01J21/04

CPC classification number: B01D53/94 ,  B01J23/464 ,  B01J23/44 ,  B01J35/0006 ,  B01J21/04 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/2092 ,  B01D2255/9032 ,  B01D2258/01

Abstract: According to the present invention, an exhaust gas purification catalyst that has both a warming performance and a high load performance is provided. By the present invention, provided is the exhaust gas purification catalyst including a base material and a catalyst coated layer. The catalyst coated layer includes a former stage part and a latter stage part. An alumina content X1 in the former stage part per volume of the base material is not more than an alumina content X2 in the latter stage part per volume of the base material A ratio (Y2/Y1) of a coating amount Y2 in the latter stage part per volume of the base material to a coating amount Y1 in the former stage part per volume of the base material satisfies 1.0

公开(公告)号：US09833771B2

公开(公告)日：2017-12-05

申请号：US15037078

申请日：2014-11-11

Applicant: CATALER CORPORATION

Inventor： Takashi Goto ,  Kenichi Taki ,  Satoshi Matsueda

IPC: B01J23/00 ,  B01J23/63 ,  B01J37/02 ,  B01D53/94 ,  B01J23/10 ,  B01J35/00 ,  B01J35/04 ,  F01N3/28

CPC classification number: B01J23/63 ,  B01D53/945 ,  B01D53/9454 ,  B01D2255/1021 ,  B01D2255/1025 ,  B01D2255/2092 ,  B01D2255/407 ,  B01D2255/65 ,  B01D2255/9022 ,  B01D2255/908 ,  B01D2255/9202 ,  B01J23/10 ,  B01J35/0006 ,  B01J35/04 ,  B01J37/0244 ,  F01N3/2803 ,  Y02T10/22

Abstract: The exhaust gas purifying catalyst presented here includes a substrate and a catalyst coat layer formed on the surface of the substrate. The catalyst coat layer is formed in a laminate structure having two layers, with a first layer being nearer to the surface of the substrate and a second layer being relatively further from this surface. The second layer includes a carrier and a noble metal supported on the carrier. The first layer is a noble metal-free layer that does not contain a noble metal but does contain an OSC material having oxygen storage capacity.

公开(公告)号：US20230277986A1

公开(公告)日：2023-09-07

申请号：US18018971

申请日：2021-07-19

Applicant: Cataler Corporation

Inventor： Taku Miura ,  Takashi Goto ,  Shunsuke Oishi

IPC: B01D53/94 ,  B01J23/63 ,  F01N3/10 ,  F01N3/08

CPC classification number: B01D53/945 ,  B01J23/63 ,  F01N3/101 ,  F01N3/103 ,  F01N3/0864 ,  B01D2255/9022 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/2065 ,  B01D2257/702 ,  B01D2257/40 ,  B01D2257/502 ,  B01D2258/01 ,  F01N2510/06 ,  F01N2570/12 ,  F01N2570/14 ,  F01N2570/16

Abstract: The present disclosure provides an exhaust gas purifying catalyst that may exhibit high purification performance both in a low temperature state immediately after an engine is started and during a high-load operation. The exhaust gas purifying catalyst disclosed herein contains at least one type of noble metal purifying exhaust gas, and includes a substrate, and a catalyst coat layer formed on a surface of the substrate. The catalyst coat layer is formed to have a stack structure including a lower layer provided on the substrate and an upper layer provided on the lower layer. The lower layer contains a noble metal and an oxide having an oxygen storage capacity. A noble metal-containing surface layer portion containing a noble metal is formed in at least a part of a surface portion of the upper layer. The upper layer does not contain an oxide having the oxygen storage capacity.