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    Exhaust gas purifying catalyst
    5.
    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
    9.
    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 catalyst
    10.
    发明申请
    Exhaust gas purifying catalyst 有权
    废气净化催化剂

    公开(公告)号：US20060142151A1

    公开(公告)日：2006-06-29

    申请号：US11318190

    申请日：2005-12-23

    申请人： Kenichi Taki ,  Akimasa Hirai ,  Hiromasa Suzuki

    发明人： Kenichi Taki ,  Akimasa Hirai ,  Hiromasa Suzuki

    IPC分类号： B01J23/10

    CPC分类号： B01J23/63 ,  B01D53/945 ,  B01D2255/102 ,  B01D2255/2042 ,  B01D2255/2063 ,  B01D2255/407 ,  B01D2255/9032 ,  B01D2255/908 ,  B01J35/0006 ,  B01J35/04 ,  B01J37/0248 ,  Y02T10/22

    摘要： An exhaust gas purifying catalyst comprises a substrate having a through hole serving as a passage for exhaust gas; and a catalyst coating layer formed on an internal surface of the through hole. The catalyst coating layer contains: a component (i): a precious metal; and a component (ii): at least one of a Zr oxide, a Ce oxide and a ZrCe mixed oxide. On an upstream portion of the passage, an oxide equivalent weight of Zr is within a range of 51-100 wt % of an oxide equivalent weight of Zr and Ce contained in the component (ii). On a downstream portion of the passage, the component (ii) includes at least one of a Ce oxide and a ZrCe mixed oxide in which an oxide equivalent weight of Ce is within a range of 58-100 wt % of an oxide equivalent weight of Zr and Ce contained in the ZrCe mixed oxide.

    摘要翻译： 废气净化催化剂包括具有用作废气通道的通孔的基板; 以及形成在通孔的内表面上的催化剂涂层。 催化剂涂层含有：（i）成分：贵金属; 和组分（ii）：Zr氧化物，Ce氧化物和ZrCe混合氧化物中的至少一种。 在通道的上游部分，Zr的氧化物当量在组分（ii）中所含的Zr和Ce的氧化物当量重量的51-100重量％的范围内。 在通道的下游部分，组分（ii）包括Ce氧化物和ZrCe混合氧化物中的至少一种，其中氧化物当量的Ce的氧化物当量为58-100重量％ 包含在ZrCe混合氧化物中的Zr和Ce。