公开(公告)号：US20210197176A1

公开(公告)日：2021-07-01

申请号：US17107224

申请日：2020-11-30

申请人： Isao CHINZEI ,  Seiji NAKAHIGASHI ,  Shogo SHIRAKAWA ,  Hiromasa SUZUKI ,  Masahide MIURA ,  Takahiro NISHIO ,  Norimichi SHIMANO ,  Hiroki NIHASHI ,  Hiromi TOGASHI ,  Mitsuyoshi OKADA ,  Takashi ONOZUKA ,  Souta AKIYAMA ,  Isao NAITO

发明人： Isao CHINZEI ,  Seiji NAKAHIGASHI ,  Shogo SHIRAKAWA ,  Hiromasa SUZUKI ,  Masahide MIURA ,  Takahiro NISHIO ,  Norimichi SHIMANO ,  Hiroki NIHASHI ,  Hiromi TOGASHI ,  Mitsuyoshi OKADA ,  Takashi ONOZUKA ,  Souta AKIYAMA ,  Isao NAITO

IPC分类号： B01J23/46 ,  B01J23/10 ,  B01J35/00 ,  B01D53/94

摘要： The present disclosure provides an exhaust gas purification catalyst having an improved low-temperature activity, which comprises a substrate and a catalyst coat layer formed on the substrate, wherein the catalyst coat layer contains Rh fine particles and a promoter comprising a Ce—Zr-based composite oxide and a Zr-based composite oxide not containing cerium oxide, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation a of the particle size of 0.8 nm or less, and wherein the Rh fine particles are supported on each of the Ce—Zr-based composite oxide and the Zr-based composite oxide not containing cerium oxide.

公开(公告)号：US10189011B2

公开(公告)日：2019-01-29

申请号：US15701723

申请日：2017-09-12

申请人： Takaaki Kanazawa ,  Shunsuke Haga ,  Isao Naito ,  Akiya Chiba ,  Motoya Abe

发明人： Takaaki Kanazawa ,  Shunsuke Haga ,  Isao Naito ,  Akiya Chiba ,  Motoya Abe

IPC分类号： B01J21/04 ,  B01J21/06 ,  B01J23/10 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J23/63 ,  B01J35/00 ,  B01J35/02 ,  B01J35/10 ,  B01J37/02 ,  B01J37/08 ,  B01D53/94 ,  F01N3/10 ,  F01N3/28

摘要： An exhaust gas purifying catalyst with an excellent effect of suppressing deterioration due to aggregation of a noble metal catalyst during endurance at high temperature, and a production method therefor. The method for producing the exhaust gas purifying catalyst that has a porous carrier and a noble metal catalyst supported thereon includes: preparing the porous carrier that contains alumina-ceria-zirconia composite oxide particles and has physical property values, after subjected to baking at 900° C. for 5 hours, of a pore diameter of the particles in the range of 2 to 20 nm, a specific surface area of the particles in the range of 75 to 115 m2/g, a crystallite size of a ceria-zirconia composite oxide contained in the particles in the range of 4 to 6 nm, and a bulk density of the particles in the range of 0.5 to 0.9 cm3/g, and bringing a noble metal chemical solution having an aggregate of platinum or the like with a grain size adjusted to less than or equal to 1 nm with the use of a platinum nitric acid solution or the like, into contact with the porous carrier, so that the noble metal catalyst is supported on the porous carrier.

公开(公告)号：US20180071718A1

公开(公告)日：2018-03-15

申请号：US15701723

申请日：2017-09-12

申请人： Takaaki KANAZAWA ,  Shunsuke HAGA ,  Isao NAITO ,  Akiya CHIBA ,  Motoya ABE

发明人： Takaaki KANAZAWA ,  Shunsuke HAGA ,  Isao NAITO ,  Akiya CHIBA ,  Motoya ABE

IPC分类号： B01J23/42 ,  B01J23/10 ,  B01J37/08 ,  B01J37/02 ,  B01J35/02 ,  B01J35/10 ,  B01J35/00 ,  B01D53/94 ,  F01N3/10

CPC分类号： B01J23/42 ,  B01D53/945 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/2065 ,  B01D2255/20715 ,  B01D2255/2092 ,  B01D2255/40 ,  B01D2255/407 ,  B01D2255/9207 ,  B01J23/10 ,  B01J35/0026 ,  B01J35/023 ,  B01J35/1014 ,  B01J35/1019 ,  B01J35/1061 ,  B01J37/0215 ,  B01J37/08 ,  F01N3/101 ,  F01N3/2803 ,  F01N2370/02 ,  Y02T10/22

摘要： An exhaust gas purifying catalyst with an excellent effect of suppressing deterioration due to aggregation of a noble metal catalyst during endurance at high temperature, and a production method therefor. The method for producing the exhaust gas purifying catalyst that has a porous carrier and a noble metal catalyst supported thereon includes: preparing the porous carrier that contains alumina-ceria-zirconia composite oxide particles and has physical property values, after subjected to baking at 900° C. for 5 hours, of a pore diameter of the particles in the range of 2 to 20 nm, a specific surface area of the particles in the range of 75 to 115 m2/g, a crystallite size of a ceria-zirconia composite oxide contained in the particles in the range of 4 to 6 nm, and a bulk density of the particles in the range of 0.5 to 0.9 cm3/g, and bringing a noble metal chemical solution having an aggregate of platinum or the like with a grain size adjusted to less than or equal to 1 nm with the use of a platinum nitric acid solution or the like, into contact with the porous carrier, so that the noble metal catalyst is supported on the porous carrier.

公开(公告)号：US11577226B2

公开(公告)日：2023-02-14

申请号：US17107997

申请日：2020-12-01

申请人： Seiji Nakahigashi ,  Isao Chinzei ,  Shogo Shirakawa ,  Hiromasa Suzuki ,  Masahide Miura ,  Takahiro Nishio ,  Norimichi Shimano ,  Hiroki Nihashi ,  Mitsuyoshi Okada ,  Takashi Onozuka ,  Souta Akiyama ,  Hiromi Togashi ,  Takahiro Noguchi ,  Isao Naito

发明人： Seiji Nakahigashi ,  Isao Chinzei ,  Shogo Shirakawa ,  Hiromasa Suzuki ,  Masahide Miura ,  Takahiro Nishio ,  Norimichi Shimano ,  Hiroki Nihashi ,  Mitsuyoshi Okada ,  Takashi Onozuka ,  Souta Akiyama ,  Hiromi Togashi ,  Takahiro Noguchi ,  Isao Naito

IPC分类号： B01J23/46 ,  B01J23/42 ,  B01J35/02 ,  F01N3/10 ,  B82Y30/00

摘要： The present disclosure provides an exhaust gas purification catalyst having an improved Rh activation, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the upstream portion contains Rh fine particles and Pt, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation σ of the particle size of 0.8 nm or less, and wherein the downstream portion contains Rh.

公开(公告)号：US08691721B2

公开(公告)日：2014-04-08

申请号：US12443340

申请日：2007-09-27

申请人： Akiya Chiba ,  Motoya Abe ,  Isao Naito

发明人： Akiya Chiba ,  Motoya Abe ,  Isao Naito

IPC分类号： B01J23/46

CPC分类号： B01J23/464 ,  B01D53/945 ,  B01D2255/1025 ,  B01J23/63 ,  B01J35/008 ,  B01J37/0203 ,  B01J37/0242 ,  Y02T10/22

摘要： A rhodium-loading solution characterized by comprising rhodium atoms and an organic base in a molar ratio of 1:0.5-35.

摘要翻译： 铑负载溶液，其特征在于包含摩尔比为1:0.5-35的铑原子和有机碱。

公开(公告)号：US11719144B2

公开(公告)日：2023-08-08

申请号：US17121245

申请日：2020-12-14

申请人： Norimichi Shimano ,  Shogo Shirakawa ,  Masahide Miura ,  Isao Chinzei ,  Seiji Nakahigashi ,  Hiroki Nihashi ,  Hiromi Togashi ,  Tomomasa Aikawa ,  Isao Naito

发明人： Norimichi Shimano ,  Shogo Shirakawa ,  Masahide Miura ,  Isao Chinzei ,  Seiji Nakahigashi ,  Hiroki Nihashi ,  Hiromi Togashi ,  Tomomasa Aikawa ,  Isao Naito

IPC分类号： F01N3/10 ,  B01J23/42 ,  B01J23/46 ,  B01J35/00 ,  B01J35/02 ,  B01J37/02

CPC分类号： F01N3/105 ,  B01J23/42 ,  B01J23/464 ,  B01J35/0006 ,  B01J35/023 ,  B01J35/026 ,  B01J37/0215 ,  F01N2370/02 ,  F01N2510/0684 ,  F01N2570/16

摘要： The present disclosure provides an exhaust gas purification catalyst having improved durability, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the downstream portion contains Rh fine particles, and wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation σ of the particle size of 0.8 nm or less.

公开(公告)号：US20210199037A1

公开(公告)日：2021-07-01

申请号：US17121245

申请日：2020-12-14

申请人： Norimichi Shimano ,  Shogo Shirakawa ,  Masahide Miura ,  Isao Chinzei ,  Seiji Nakahigashi ,  Hiroki Nihashi ,  Hiromi Togashi ,  Tomomasa Aikawa ,  Isao Naito

发明人： Norimichi Shimano ,  Shogo Shirakawa ,  Masahide Miura ,  Isao Chinzei ,  Seiji Nakahigashi ,  Hiroki Nihashi ,  Hiromi Togashi ,  Tomomasa Aikawa ,  Isao Naito

IPC分类号： F01N3/10 ,  B01J23/42 ,  B01J23/46 ,  B01J35/00 ,  B01J35/02 ,  B01J37/02

摘要： The present disclosure provides an exhaust gas purification catalyst having improved durability, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the downstream portion contains Rh fine particles, and wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation a of the particle size of 0.8 nm or less.

公开(公告)号：US20100075841A1

公开(公告)日：2010-03-25

申请号：US12443340

申请日：2007-09-27

申请人： Akiya Chiba ,  Motoya Abe ,  Isao Naito

发明人： Akiya Chiba ,  Motoya Abe ,  Isao Naito

IPC分类号： B01J23/46

CPC分类号： B01J23/464 ,  B01D53/945 ,  B01D2255/1025 ,  B01J23/63 ,  B01J35/008 ,  B01J37/0203 ,  B01J37/0242 ,  Y02T10/22

摘要： A rhodium-loading solution characterized by comprising rhodium atoms and an organic base in a molar ratio of 1:0.5-35.

摘要翻译： 铑负载溶液，其特征在于包含摩尔比为1:0.5-35的铑原子和有机碱。

公开(公告)号：US06174835B1

公开(公告)日：2001-01-16

申请号：US09319658

申请日：1999-06-10

申请人： Isao Naito ,  Kazuo Oosumi ,  Yasuaki Unno

发明人： Isao Naito ,  Kazuo Oosumi ,  Yasuaki Unno

IPC分类号： B01J2300

CPC分类号： B01J35/0006 ,  B01D53/865 ,  B01D53/945 ,  B01J23/002 ,  B01J23/63 ,  B01J2523/00 ,  Y02T10/22 ,  B01J2523/24 ,  B01J2523/3712 ,  B01J2523/3725 ,  B01J2523/48 ,  B01J2523/25 ,  B01J2523/36 ,  B01J2523/3762

摘要： An exhaust gas purifying catalyst for use in an oxygen surplus atmosphere, includes a brown millerite composite oxide for directly decomposing and absorbing nitrogen oxide (NOx), and a noble metal-series reducing catalyst disposed on the surface of said brown millerite composite oxide. The brown millerite composite oxide is represented by one of the following formulae: A3-aBaC4-bDbO9, A2-aBaC2-bDbO5, and A1-aBaC2-bDbO4 where A and B are elements selected from the group consisting of Ba, Ca, Sr, Mg and Ce, C and D are elements selected from the group consisting of Y, Dy, Zn, Ti, Mn, Fe, Co, Ni, Cu, Sn, Zr and Nd, a is within the range 0≦a

摘要翻译： 一种用于富氧气氛的废气净化催化剂包括用于直接分解和吸收氮氧化物（NOx）的褐色石榴石复合氧化物，以及设置在所述棕色石榴石复合氧化物表面上的贵金属系还原催化剂。 褐铁矿复合氧化物由下式表示：其中A和B是选自Ba，Ca，Sr，Mg和Ce的元素，C和D是选自Y，Dy ，Zn，Ti，Mn，Fe，Co，Ni，Cu，Sn，Zr和Nd，a在0 <= a <1的范围内，b在0 <= b <2的范围内。

公开(公告)号：US06216452B1

公开(公告)日：2001-04-17

申请号：US09298987

申请日：1999-04-26

申请人： Isao Naito ,  Kazuo Oosumi

发明人： Isao Naito ,  Kazuo Oosumi

IPC分类号： F02M2506

CPC分类号： F02D21/08 ,  F02M26/15 ,  F02M26/48

摘要： An exhaust gas purifying apparatus provides a reflux pipe for connecting an intake pipe to an exhaust pipe and an EGR valve disposed in the reflux pipe for adjusting a flow rate of the exhaust gas flowing through the reflux pipe. A nitrogen oxide purifying catalyst section is formed by a brown miralite type composite oxide. A pair of electrodes are provided on the vicinity of the opposite ends of the purifying catalyst section. A conductivity measuring section measures conductivity of a nitrogen oxide catalyst of the nitrogen oxide purifying catalyst section through the electrodes. A control section controls an opening degree of the EGR valve on the basis of engine rpm, engine load and the conductivity measured in the conductivity measuring section.

摘要翻译： 排气净化装置提供用于将进气管连接到排气管的回流管和设置在回流管中的EGR阀，用于调节流过回流管的排气的流量。 氮氧化物净化催化剂部分由棕色的堇青石型复合氧化物形成。 在净化催化剂部分的相对端附近设置一对电极。 电导率测定部测定通过电极的氮氧化物净化催化剂部的氮氧化物催化剂的导电率。 控制部根据发动机转数，发动机负荷和电导率测定部测定的电导率来控制EGR阀的开度。