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    Exhaust gas purifying catalyst
    2.
    发明授权
    Exhaust gas purifying catalyst 有权
    废气净化催化剂

    公开(公告)号：US07998896B2

    公开(公告)日：2011-08-16

    申请号：US11997430

    申请日：2006-07-24

    申请人： Ichiro Kitamura ,  Kenichi Taki ,  Akimasa Hirai

    发明人： Ichiro Kitamura ,  Kenichi Taki ,  Akimasa Hirai

    IPC分类号： B01J23/00 ,  B01J21/00 ,  B01J20/00 ,  B01D50/00 ,  B01D53/34

    CPC分类号： B01D53/945 ,  B01D2255/102 ,  B01D2255/407 ,  B01J23/63 ,  B01J35/0006 ,  B01J37/0244 ,  F01N3/28 ,  F01N2510/065 ,  Y02T10/22

    摘要： An exhaust gas purifying catalyst having a good ignition performance is provided. The exhaust gas purifying catalyst 1 includes a catalyst substrate 3 and a catalyst coating layer 5 which contains a noble metal and a refractory inorganic oxide and is formed on the catalyst substrate. The exhaust gas purifying catalyst is characterized in that the catalyst coating layer 5 includes an upstream portion 11 located upstream and a downstream portion 13 located downstream in a flow direction of an exhaust gas. The upstream portion 11 has a layered structure including an upstream portion inside layer 17 and an upstream portion outside layer 15. The upstream portion inside layer contains a cerium-zirconium composite oxide in which a relative proportion of CeO2 is 50 to 95 wt %, as the refractory inorganic oxide, and the upstream portion outside layer 15 and the downstream portion 13 contain a cerium-zirconium composite oxide in which a relative proportion of ZrO2 is 50 to 95 wt %, as the refractory inorganic oxide.

    摘要翻译： 提供具有良好点火性能的废气净化催化剂。 废气净化催化剂1包括催化剂基板3和含有贵金属和耐火无机氧化物并形成在催化剂基板上的催化剂涂层5。 废气净化催化剂的特征在于，催化剂涂层5包括位于上游的上游部分11和位于排气流动方向下游的下游部分13。 上游部分11具有包括上游部分内层17和上游部分外侧层15的层状结构。上游部分内层含有CeO 2的相对比例为50〜95重量％的铈锆复合氧化物，如 耐火无机氧化物，上游侧外层15和下游部13含有ZrO 2的相对比例为50〜95重量％的铈 - 锆复合氧化物作为耐火无机氧化物。

    Catalyst For Purifying Exhaust Gases
    5.
    发明申请
    Catalyst For Purifying Exhaust Gases 失效
    催化剂用于净化排气

    公开(公告)号：US20080081762A1

    公开(公告)日：2008-04-03

    申请号：US11791141

    申请日：2004-11-25

    申请人： Ichiro Kitamura ,  Akimasa Hirai ,  Kenichi Taki

    发明人： Ichiro Kitamura ,  Akimasa Hirai ,  Kenichi Taki

    IPC分类号： B01J23/46

    CPC分类号： B01J23/63 ,  B01D53/945 ,  B01J23/40 ,  B01J23/464 ,  B01J35/0006 ,  B01J37/0242 ,  B01J37/0244 ,  Y02T10/22

    摘要： This is to provide a catalyst for purifying exhaust gases, catalyst which are good in terms of the purifying performance. A catalyst according to the present invention for purifying exhaust gases comprises: a catalytic support substrate (1); a first catalytic layer (2) having a first loading layer formed on an upstream side of the catalytic support substrate (1) and made of a fire-resistant inorganic oxide, and Rh loaded in the first loading layer; a second catalytic layer (3) having a second loading layer formed on a surface of the catalytic support substrate (1) on an downstream side of the first catalytic layer (2) and made of a fire-resistant inorganic oxide, and Pd and/or Pt loaded in the second loading layer; and a third catalytic layer (4) having a third loading layer formed on a surface of the second catalytic layer (3) and made of a fire-resistant inorganic oxide, and Rh loaded in the third loading layer; and is characterized in that: the first catalytic layer (2) is such that, when taking Rh loaded in the first catalytic layer as 100% by weight, Rh is loaded in an amount of 70% by weight or more within such a range that the distance from the surface is 20 μm; and the loading amount of Rh loaded in the first catalytic layer (2) is from 1.5 to 15 times as much as the loading amount of Rh loaded in the third loading layer. Because of the fact that Rh is loaded in a great loading amount in the superficial layer portion on an upstream side of exhaust-gas flow, it turns into a catalyst for purifying exhaust gases, catalyst which is good in terms of the purifying characteristics.

    摘要翻译： 这是为了提供净化废气的催化剂，在净化性能方面优异的催化剂。 根据本发明的用于净化废气的催化剂包括：催化支撑基材（1）; 第一催化剂层（2），其具有形成在所述催化剂载体基材（1）的上游侧并由耐火无机氧化物制成的第一载体层，以及负载在所述第一载体层中的Rh; 第二催化剂层（3），其在第一催化剂层（2）的下游侧上形成有由耐火无机氧化物制成的催化支撑基材（1）的表面上的第二载体层，以及Pd和/ 或Pt装载在第二加载层中; 以及第三催化剂层（4），其具有形成在所述第二催化剂层（3）的表面上并由耐火无机氧化物制成的第三负载层，以及负载在所述第三负载层中的Rh; 其特征在于：第一催化剂层（2）使得当将负载在第一催化剂层中的Rh作为100重量％时，Rh的负载量为70重量％以上， 表面距离为20 mum; 并且负载在第一催化剂层（2）中的负载量为负载在第三装载层中的负载量的1.5〜15倍。 由于Rh在排气流的上游侧的表层部中负载量大，所以成为净化特性良好的废气净化用催化剂。

    EXHAUST GAS PURIFYING CATAYST
    6.
    发明申请
    EXHAUST GAS PURIFYING CATAYST 有权
    排气净化电池

    公开(公告)号：US20100150792A1

    公开(公告)日：2010-06-17

    申请号：US11997430

    申请日：2006-07-24

    申请人： Ichiro Kitamura ,  Kenichi Taki ,  Akimasa Hirai

    发明人： Ichiro Kitamura ,  Kenichi Taki ,  Akimasa Hirai

    IPC分类号： B01D53/86 ,  B01J15/00 ,  F01N3/24

    CPC分类号： B01D53/945 ,  B01D2255/102 ,  B01D2255/407 ,  B01J23/63 ,  B01J35/0006 ,  B01J37/0244 ,  F01N3/28 ,  F01N2510/065 ,  Y02T10/22

    摘要： An exhaust gas purifying catalyst having a good ignition performance is provided. The exhaust gas purifying catalyst 1 includes a catalyst substrate 3 and a catalyst coating layer 5 which contains a noble metal and a refractory inorganic oxide and is formed on the catalyst substrate. The exhaust gas purifying catalyst is characterized in that the catalyst coating layer 5 includes an upstream portion 11 located upstream and a downstream portion 13 located downstream in a flow direction of an exhaust gas. The upstream portion 11 has a layered structure including an upstream portion inside layer 17 and an upstream portion outside layer 15. The upstream portion inside layer contains a cerium-zirconium composite oxide in which a relative proportion of CeO2 is 50 to 95 wt %, as the refractory inorganic oxide, and the upstream portion outside layer 15 and the downstream portion 13 contain a cerium-zirconium composite oxide in which a relative proportion of ZrO2 is 50 to 95 wt %, as the refractory inorganic oxide.

    摘要翻译： 提供具有良好点火性能的废气净化催化剂。 废气净化催化剂1包括催化剂基板3和含有贵金属和耐火无机氧化物并形成在催化剂基板上的催化剂涂层5。 废气净化催化剂的特征在于，催化剂涂层5包括位于上游的上游部分11和位于排气流动方向下游的下游部分13。 上游部分11具有包括上游部分内层17和上游部分外侧层15的层状结构。上游部分内层含有CeO 2的相对比例为50〜95重量％的铈锆复合氧化物，如 耐火无机氧化物，上游侧外层15和下游部13含有ZrO 2的相对比例为50〜95重量％的铈 - 锆复合氧化物作为耐火无机氧化物。

    EXHAUST GAS PURIFYING CATAYST
    7.
    发明申请
    EXHAUST GAS PURIFYING CATAYST 有权
    排气净化电池

    公开(公告)号：US20090124492A1

    公开(公告)日：2009-05-14

    申请号：US11995981

    申请日：2006-07-18

    申请人： Ichiro Kitamura ,  Kenichi Taki ,  Akimasa Hirai

    发明人： Ichiro Kitamura ,  Kenichi Taki ,  Akimasa Hirai

    IPC分类号： B01J23/10

    CPC分类号： B01J35/0006 ,  B01D53/945 ,  B01D53/9477 ,  B01D2255/1025 ,  B01D2255/407 ,  B01D2255/9022 ,  B01J23/63 ,  B01J37/0244 ,  F01N3/10 ,  F01N2370/02 ,  F01N2510/06 ,  Y02T10/22

    摘要： An exhaust gas purifying catalyst includes a catalyst substrate and a catalyst coating layer containing a noble metal and a refractory inorganic oxide. The catalyst coating layer includes an upstream portion located upstream and a downstream portion located downstream in a flow direction of an exhaust gas. The upstream portion has a layered structure including an upstream portion inside layer containing a cerium-zirconium composite oxide in which a relative proportion of CeO2 is 50 to 95 wt %, as the refractory inorganic oxide and an upstream portion outside layer containing a cerium-zirconium composite oxide in which a relative proportion of ZrO2 is 50 to 95 wt %, as the refractory inorganic oxide. The upstream portion outside layer and the downstream portion contain Rh as the noble metal, and an amount of Rh contained in the upstream portion outside layer is larger than an amount of Rh contained in the downstream portion.

    摘要翻译： 废气净化催化剂包括催化剂基质和含有贵金属和耐火无机氧化物的催化剂涂层。 催化剂涂层包括位于上游的上游部分和位于排气流动方向下游的下游部分。 上游部分具有包括上游部分内层的层状结构，所述上层部分内层含有CeO 2的相对比例为50〜95重量％的铈 - 锆复合氧化物作为耐火无机氧化物，以及含有铈锆的上游部分外层 作为耐火性无机氧化物，ZrO 2的相对比例为50〜95重量％的复合氧化物。 上游部分外层和下游部分含有Rh作为贵金属，并且上游部分外层中包含的Rh的量大于下游部分中包含的Rh的量。

    Exhaust gas purifying catalyst
    8.
    发明授权
    Exhaust gas purifying catalyst 有权
    废气净化催化剂

    公开(公告)号：US08309488B2

    公开(公告)日：2012-11-13

    申请号：US11995981

    申请日：2006-07-18

    申请人： Ichiro Kitamura ,  Kenichi Taki ,  Akimasa Hirai

    发明人： Ichiro Kitamura ,  Kenichi Taki ,  Akimasa Hirai

    IPC分类号： B01J23/00 ,  B01J21/00 ,  B01J20/00 ,  B01D50/00 ,  B01D53/34

    CPC分类号： B01J35/0006 ,  B01D53/945 ,  B01D53/9477 ,  B01D2255/1025 ,  B01D2255/407 ,  B01D2255/9022 ,  B01J23/63 ,  B01J37/0244 ,  F01N3/10 ,  F01N2370/02 ,  F01N2510/06 ,  Y02T10/22

    摘要： An exhaust gas purifying catalyst includes a catalyst substrate and a catalyst coating layer containing a noble metal and a refractory inorganic oxide. The catalyst coating layer includes an upstream portion located upstream and a downstream portion located downstream in a flow direction of an exhaust gas. The upstream portion has a layered structure including an upstream portion inside layer containing a cerium-zirconium composite oxide in which a relative proportion of CeO2 is 50 to 95 wt %, as the refractory inorganic oxide and an upstream portion outside layer containing a cerium-zirconium composite oxide in which a relative proportion of ZrO2 is 50 to 95 wt %, as the refractory inorganic oxide. The upstream portion outside layer and the downstream portion contain Rh as the noble metal, and an amount of Rh contained in the upstream portion outside layer is larger than an amount of Rh contained in the downstream portion.

    摘要翻译： 废气净化催化剂包括催化剂基质和含有贵金属和耐火无机氧化物的催化剂涂层。 催化剂涂层包括位于上游的上游部分和位于排气流动方向下游的下游部分。 上游部分具有包括上游部分内层的层状结构，所述上层部分内层含有CeO 2的相对比例为50〜95重量％的铈 - 锆复合氧化物作为耐火无机氧化物，以及含有铈锆的上游部分外层 作为耐火性无机氧化物，ZrO 2的相对比例为50〜95重量％的复合氧化物。 上游部分外层和下游部分含有Rh作为贵金属，并且上游部分外层中包含的Rh的量大于下游部分中包含的Rh的量。