公开(公告)号：US20220339606A1

公开(公告)日：2022-10-27

申请号：US17861320

申请日：2022-07-11

申请人： CATALER CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Shunsuke OISHI ,  Takaya OTA ,  Yoshinori SAITO ,  Seiji NAKAHIGASHI ,  Isao CHINZEI ,  Hiromasa SUZUKI

IPC分类号： B01J23/63 ,  B01D53/94 ,  B01J35/00 ,  B01J37/02 ,  F01N3/28

摘要： Methods for exhaust gas purification, including the steps of: attaching an exhaust gas purification catalyst to an exhaust system of an internal combustion engine, and supplying an exhaust gas to the exhaust gas purification catalyst, where the exhaust gas purification catalyst includes an upper layer containing first carrier particles which are particles of an inorganic oxide and rhodium, and a lower layer containing second carrier particles which are particles of an inorganic oxide, the upper layer includes a rhodium-rich portion near the surface of the upper layer on the upstream side of the exhaust gas flow, and the existence range of the rhodium-rich portion is in a range of greater than 50% to 80% of the length of the upper layer from a downstream side end of an exhaust gas flow and of less than 20 μm in the depth direction from an outermost surface of the upper layer.

公开(公告)号：US20210094027A1

公开(公告)日：2021-04-01

申请号：US16970667

申请日：2019-01-25

申请人： CATALER CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Shunsuke OISHI ,  Takaya OTA ,  Isao CHINZEI ,  Hiromasa SUZUKI ,  Yoshinori SAITO ,  Seiji NAKAHIGASHI

IPC分类号： B01J37/02 ,  B01J23/46 ,  B01J23/10 ,  B01J35/00 ,  F01N3/08

摘要： The exhaust gas purification catalyst device includes an upper layer which includes first carrier particles and rhodium, and a lower layer which includes second carrier particles, and the upper layer includes a rhodium enriched area in the range a, from the upstream end in the exhaust gas flow to 50% of the upper layer length, and a range b from the upper layer top surface to 18 μm in the depth direction. The rhodium enriched area contains at least 50% and less than 100% of all the rhodium in the upper layer.

公开(公告)号：US20200376467A1

公开(公告)日：2020-12-03

申请号：US16970519

申请日：2019-01-29

申请人： CATALER CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Shunsuke OISHI ,  Takaya OTA ,  Yoshinori SAITO ,  Seiji NAKAHIGASHI ,  Isao CHINZEI ,  Hiromasa SUZUKI

IPC分类号： B01J23/63 ,  B01J35/00 ,  B01J37/02 ,  B01D53/94 ,  F01N3/28

摘要： This exhaust gas purification catalyst device includes an upper layer which includes first carrier particles and rhodium, and a lower layer which includes second carrier particles, and the upper layer includes a rhodium enriched area in the range a, from the downstream end in the exhaust gas flow to greater than 50% and up to 80% of the upper layer length, and a range b from the upper layer top surface less than 20 μm in the depth direction. The rhodium enriched area contains at least 50% and less than 100% of all the rhodium in the upper layer.

公开(公告)号：US20230114106A1

公开(公告)日：2023-04-13

申请号：US17912140

申请日：2021-03-17

申请人： CATALER CORPORATION

发明人： Kohei TAKASAKI ,  Tatsuya OHASHI ,  Shunsuke OISHI

IPC分类号： B01J29/74 ,  B01J23/44 ,  B01J21/04 ,  B01J35/10 ,  B01J35/02 ,  B01D53/94

摘要： An exhaust gas purification catalyst device comprising a base material and a catalyst coating layer provided on the base material, wherein the catalyst coating layer contains zeolite particles, inorganic oxide particles other than the zeolite particles, and a catalyst precious metal, and the ratio dZEO/dOX between the average particle diameter dZEO of the zeolite particles and the average particle diameter dOX of the inorganic oxide particles other than the zeolite particles is 3.4 or less.