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    Composite oxide powder, catalyst and process for producing the same
    3.
    发明授权
    Composite oxide powder, catalyst and process for producing the same 失效
    复合氧化物粉末，催化剂及其制造方法

    公开(公告)号：US06762147B2

    公开(公告)日：2004-07-13

    申请号：US10079872

    申请日：2002-02-22

    申请人： Akira Morikawa ,  Takao Tani ,  Miho Hatanaka ,  Akihiko Suda

    发明人： Akira Morikawa ,  Takao Tani ,  Miho Hatanaka ,  Akihiko Suda

    IPC分类号： B01J2108

    CPC分类号： B01D53/945 ,  B01D53/944 ,  B01J23/10 ,  B01J35/023 ,  B01J35/1047 ,  B01J37/0045 ,  B01J37/0054 ,  C01B13/0262 ,  F01N3/2803 ,  F01N2570/16 ,  Y02T10/22

    摘要： Composite oxide powder has a large specific surface area and a large pore volume even after a high-temperature durability test, without losing oxygen storage ability of a single metal oxide. In this composite oxide powder, a first metal oxide having oxygen storage ability is held as ultrafine particles in the form of islands by a second metal oxide which is different from the first metal oxide, pore volume is not less than 2 cc/g and the first metal oxide particles have a diameter of not more than 30 nm even after subjected to high temperature of 900° C. or more. Since the first metal oxide particles are held in the form of islands by the second metal oxide particles, separated from each other and suppressed from contacting each other, the first metal oxide particles hardly grow granularly.

    摘要翻译： 复合氧化物粉末即使在高温耐久性试验后也具有大的比表面积和较大的孔体积，而不损失单一金属氧化物的储氧能力。 在该复合氧化物粉末中，具有储氧能力的第一金属氧化物通过与第一金属氧化物不同的第二金属氧化物保持为岛状的超微粒子，孔体积不小于2cc / g， 即使在900℃以上的高温下，第一金属氧化物粒子的直径也不大于30nm。 由于第一金属氧化物颗粒通过第二金属氧化物颗粒被保持为岛状，因此彼此分离并被抑制彼此接触，因此第一金属氧化物颗粒几乎不会颗粒生长。

    Composite oxide, process for producing the same, and exhaust gas reducing co-catalyst
    4.
    发明授权
    Composite oxide, process for producing the same, and exhaust gas reducing co-catalyst 有权
    复合氧化物，其制造方法和废气还原助催化剂

    公开(公告)号：US07247597B2

    公开(公告)日：2007-07-24

    申请号：US10225186

    申请日：2002-08-22

    申请人： Akira Morikawa ,  Yasutaka Nagai ,  Toshitaka Tanabe ,  Tadashi Suzuki ,  Akihiko Suda ,  Hideo Sobukawa

    发明人： Akira Morikawa ,  Yasutaka Nagai ,  Toshitaka Tanabe ,  Tadashi Suzuki ,  Akihiko Suda ,  Hideo Sobukawa

    IPC分类号： B01J23/00 ,  C01G49/00 ,  C04B35/48

    CPC分类号： B01J35/002 ,  B01D2255/1021 ,  B01D2255/2065 ,  B01D2255/20715 ,  B01D2255/407 ,  B01D2255/908 ,  B01J21/066 ,  B01J23/10 ,  B01J23/63 ,  B01J35/023 ,  B01J35/1014 ,  B01J37/03 ,  F01N2570/16

    摘要： A composite oxide includes CeO2, ZrO2 and a metallic oxide being free from reacting with CeO2 and ZrO2 at 700° C. or more, preferably at 900° C. or more and further preferably at 1,000° C. or more. The composite oxide has a regulatory oriented phase, such as a pyrochlore phase, etc., in which at least a part of Ce cations and Zr cations are oriented regularly. The composite oxide makes a catalytic support. The CeO2—ZrO2 composite oxide and the reaction-free metallic oxide make barriers each other which suppress the granular growth when the composite oxide is subjected to high-temperature heat in a reducing heat treatment to form the regulatory oriented phase. The regulatory oriented phase improves the oxygen storage-and-release capability of the catalytic support. Thus, it is possible to simultaneously attain a large a specific surface area and a high oxygen storage-and-release capability.

    摘要翻译： 复合氧化物包括CeO 2 SiO 2，ZrO 2 2和不与CeO 2和ZrO 2的反应的金属氧化物 > 700℃以上，优选为900℃以上，进一步优选为1000℃以上。 复合氧化物具有调节取向相，如烧绿石相等，其中至少一部分Ce阳离子和Zr阳离子定期取向。 复合氧化物起催化作用。 当复合氧化物经受高温加热时，CeO 2 -ZrO 2复合氧化物和无反应的金属氧化物形成彼此的屏障，其抑制颗粒生长 一种还原热处理，形成规范导向相。 调节取向相提高了催化支持物的储氧和释放能力。 因此，可以同时获得大的比表面积和高的储氧 - 释放能力。

    Catalyst for purifying exhaust gas
    7.
    发明授权
    Catalyst for purifying exhaust gas 有权
    废气净化催化剂

    公开(公告)号：US06335305B1

    公开(公告)日：2002-01-01

    申请号：US09547347

    申请日：2000-04-11

    申请人： Tadashi Suzuki ,  Akira Morikawa ,  Hideo Sobukawa

    发明人： Tadashi Suzuki ,  Akira Morikawa ,  Hideo Sobukawa

    IPC分类号： B01J2300

    CPC分类号： B01D53/945 ,  B01J23/63 ,  B01J37/03 ,  Y02T10/22

    摘要： A catalyst for purifying an exhaust gas includes a support and a noble metal loaded on the support. The support includes a mixture containing a porous oxide and a composite oxide. The composite oxide is expressed by the following formula: (Al2O3)a(CeO2)b(ZrO2)1−b in which the values “a” and “b” are molar ratios and the value “a” falls in a range of from 0.4 to 2.5 and the value “b” falls in a range of from 0.2 to 0.7. The support includes a particle having a particle diameter of 5 &mgr;m or more in an amount of 30% by volume or more. With the thus arranged support, even when the catalyst is subjected to such a severe durability test that it is heated at 1,000° C. for 10 to 20 hours, it exhibits a high purifying activity, and its coating layer is inhibited from cracking or coming off.

    摘要翻译： 用于净化废气的催化剂包括负载在载体上的载体和贵金属。 载体包括含有多孔氧化物和复合氧化物的混合物。 复合氧化物由下式表示：其中值“a”和“b”是摩尔比，值“a”在0.4至2.5的范围内，并且值“b”落在 从0.2到0.7。 该载体包含30体积％以上的粒径为5μm以上的粒子。 通过这样排列的支撑体，即使催化剂进行如此严格的耐久试验，即在1000℃下加热10〜20小时，显示出高的净化活性，并且其涂层被抑制开裂或开始 关闭