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332 条记录 (耗时 0.019 秒)

    Heat-resistant noble metal catalyst and method of producing the same
    16.
    发明授权
    Heat-resistant noble metal catalyst and method of producing the same 失效
    耐热贵金属催化剂及其制造方法

    公开(公告)号：US4959339A

    公开(公告)日：1990-09-25

    申请号：US336218

    申请日：1989-04-11

    申请人： Hiromichi Arai

    发明人： Hiromichi Arai

    IPC分类号： B01D53/86 ,  B01D53/94 ,  B01J23/58 ,  B01J23/63 ,  B01J23/64 ,  B01J23/652 ,  B01J23/656 ,  B01J23/66 ,  B01J23/68 ,  B01J23/89 ,  C07B31/00 ,  C07B41/00

    CPC分类号： B01J23/63 ,  B01D53/945 ,  B01J23/58 ,  B01J23/64 ,  B01J23/66 ,  B01J23/8933 ,  Y02T10/22

    摘要： A heat-resistant noble metal catalyst having both of exceedingly superior heat-resistant property and a remarkable high activity at any temperature ranges of low, middle, and high, is provided having a heat-reistant noble metal catalyst consisting essentially of a composition having a formula A.sub.1-z C.sub.z B.sub.x D.sub.u Al.sub.12-y-u O.sub.19-.alpha., wherein A is at least one element selected from the group consisting of Ba, Ca and Sr, C is at least one element selected from the group consisting of K, Rb and rare earth elements, B is at least one element selected from the group consisting of Mn, Co, Fe, Ni, Cu and Cr, D is at least one element selected from the group consisting of Au, Ag and platinum group noble metals, z is a value in a range of 0-about 0.4, x is a value in a range of 0-about 4, y is a value in a range of x-2x, u is a value of not less than about 0.01, x+u is a value of not more than about 4, and .alpha. is a value which is determined by the values X, Y, Z and U of the respective elements, A, C, B and D and the values of x, y, z and u and is expressed as.alpha.=1-1/2{X-z(X-Y)+xZ+uU-3y-3u}.A method of producing such a catalyst is also provided.

    Catalyst compositions and methods of making the same
    18.
    发明授权
    Catalyst compositions and methods of making the same 失效
    催化剂组合物及其制备方法

    公开(公告)号：US4727052A

    公开(公告)日：1988-02-23

    申请号：US879684

    申请日：1986-06-27

    申请人： Chung-Zong Wan ,  Joseph C. Dettling

    发明人： Chung-Zong Wan ,  Joseph C. Dettling

    IPC分类号： B01D53/94 ,  B01J21/04 ,  B01J23/40 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J23/56 ,  B01J23/58 ,  B01J23/63 ,  B01J23/64 ,  B01J23/652 ,  B01J23/89 ,  B01J37/02 ,  B01J37/18 ,  F02B1/04

    CPC分类号： B01D53/945 ,  B01J21/04 ,  B01J23/40 ,  B01J23/63 ,  B01J37/0242 ,  F02B1/04 ,  Y02T10/22

    摘要： A method of making a catalyst composition comprising an activated alumina coating stabilized against thermal degradation includes applying a coating of alumina having one or more platinum group metal catalytic components dispersed thereon onto a carrier substrate and calcining the coating. The calcined coating is then impregnated with a solution of a thermal stabilizer-precursor and calcined again to provide a thermal stabilizer in the alumina. Bulk ceria, optionally an aluminum-stabilized bulk ceria, may also be added to the composition, preferably at specified minimum levels, including a high purity bulk ceria on which one or more non-rhodium platinum group metal catalytic components, e.g., platinum, optionally, are dispersed. A separate aspect of the invention provides for a method of making a catalyst composition including dispersing one or more platinum group metal catalytic components on an activated alumina and calcining the combined alumina and platinum group metal catalytic components. The steps are carried out under limited acidification conditions whereby at least minimum dispersions of the platinum group metal catalytic components are attained. The invention also provides for catalyst compositions resulting from either or both the foregoing methods.

    摘要翻译： 制备包含稳定防止热降解的活性氧化铝涂层的催化剂组合物的方法包括将分散在其上的一种或多种铂族金属催化组分的氧化铝涂层施加到载体基材上并煅烧该涂层。 然后将煅烧的涂层用热稳定剂 - 前体的溶液浸渍并再次煅烧，以在氧化铝中提供热稳定剂。 也可以将块状二氧化铈，任选的铝稳定体二氧化铈，优选以规定的最低水平添加到组合物中，包括高纯度本体二氧化铈，其中一种或多种非铑铂族金属催化组分，例如铂，任选地 ，分散。 本发明的另一方面提供了制备催化剂组合物的方法，包括将一种或多种铂族金属催化组分分散在活性氧化铝上并煅烧组合的氧化铝和铂族金属催化组分。 该步骤在有限的酸化条件下进行，由此达到铂族金属催化组分的至少最小分散体。 本发明还提供了由上述方法中的一种或两种产生的催化剂组合物。

    Aluminum-stabilized ceria catalyst compositions, and methods of making the same
    19.
    发明授权
    Aluminum-stabilized ceria catalyst compositions, and methods of making the same 失效
    铝稳定二氧化铈催化剂组合物及其制备方法

    公开(公告)号：US4714694A

    公开(公告)日：1987-12-22

    申请号：US880270

    申请日：1986-06-30

    申请人： Chung-Zong Wan ,  Joseph C. Dettling

    发明人： Chung-Zong Wan ,  Joseph C. Dettling

    IPC分类号： B01D53/94 ,  B01J23/10 ,  B01J23/56 ,  B01J23/63 ,  B01J23/64 ,  B01J23/89

    CPC分类号： B01D53/945 ,  B01J23/10 ,  B01J23/63 ,  Y02T10/22

    摘要： A catalyst material comprises an aluminum-stabilized ceria which optionally may be combined with an activated alumina and may also comprise one or more platinum group metal catalytic components. A method of making the material includes impregnating bulk ceria or a bulk ceria precursor with an aluminum compound and calcining the impregnated ceria to provide an aluminum-stabilized ceria. The bulk ceria advantageously comprises a high purity (at least 90 weight percent CeO.sub.2) ceria and may be admixed with activated aluminia having one or more platinum group metal catalytic components dispersed thereon. The catalyst material may be coated onto a suitable carrier substrate and then calcined. Specified minimum levels of the aluminum-stabilized bulk ceria are advantageously employed in the catalyst materials of the invention. The bulk ceria may have one or more preferably non-rhodium platinum group metal catalytic components dispersed thereon, e.g., a platinum catalytic component, and one or more platinum group metal catalytic components dispersed on the activated alumina.