Exhaust gas treatment catalyst for internal combustion engines with two catalytically active layers on a carrier structure
    23.
    发明授权
    Exhaust gas treatment catalyst for internal combustion engines with two catalytically active layers on a carrier structure 失效
    在载体结构上具有两个催化活性层的内燃机的废气处理催化剂

    公开(公告)号:US06348430B1

    公开(公告)日:2002-02-19

    申请号:US09100251

    申请日:1998-06-19

    Abstract: A catalyst for treating the exhaust gas from internal combustion engines is provided, wherein the catalyst contains two catalytically active layers supported on a support. The first catalytically active layer contains a platinum group metal in close contact with all of the constituents of the first catalytically active layer, wherein the constituents of the first catalytically active layer include particulate aluminum oxide; particulate oxygen storage material, such as cerium oxide, cerium/zirconium and zirconium/cerium mixed oxides, and alkaline earth metal oxides. The second catalytically active layer, which is in direct contact with the exhaust gas, contains particulate aluminum oxide and at least one particulate oxygen storage material, such as cerium oxide, cerium/zirconium and zirconium/cerium mixed oxides. Rhodium is supported on part of the aluminum oxides in the second catalytically active layer or on the particulate oxygen storage material in the second catalytically active layer. By providing the platinum group metal in close contact with all of the constituents of the first catalytically active layer, improved conversion efficiency of the impurities in the exhaust gas can be achieved.

    Abstract translation: 提供了一种用于处理来自内燃机的废气的催化剂,其中催化剂含有两个负载在载体上的催化活性层。 第一催化活性层包含与第一催化活性层的所有成分紧密接触的铂族金属,其中第一催化活性层的组分包括颗粒状氧化铝; 颗粒状储氧材料,如氧化铈,铈/锆和锆/铈混合氧化物和碱土金属氧化物。 与废气直接接触的第二催化活性层含有颗粒状氧化铝和至少一种颗粒状储氧材料,例如氧化铈,铈/锆和锆/铈混合氧化物。 铑负载在第二催化活性层中的一部分氧化铝上或第二催化活性层中的颗粒储氧材料上。 通过提供与第一催化活性层的所有成分紧密接触的铂族金属,可以实现废气中杂质的转化效率的提高。

    Layered noble metal-containing exhaust gas catalyst and its preparation
    24.
    发明授权
    Layered noble metal-containing exhaust gas catalyst and its preparation 有权
    分层贵金属废气催化剂及其制备方法

    公开(公告)号:US06294140B1

    公开(公告)日:2001-09-25

    申请号:US09409744

    申请日:1999-10-01

    Abstract: A catalyst for treating exhaust gas from an internal combustion engine includes a carrier body coated with an inner layer and an outer layer. The inner layer includes platinum deposited on a first support material and on a first oxygen storage component, and the outer layer includes platinum and rhodium deposited on a second support material and on a second oxygen storage component. The first and second support materials may be the same or different, and may be selected from the group of: silica, alumina, titania, zirconia, mixed oxides or mixtures thereof, and zirconia-rich zirconia/ceria mixed oxide. The first and second oxygen storage components may include ceria-rich ceria/zirconia mixed oxide compounds, optionally including praseodymia, yttria, neodymia, lanthana or mixtures thereof.

    Abstract translation: 用于处理来自内燃机的废气的催化剂包括涂覆有内层和外层的载体。 内层包括沉积在第一支撑材料上的铂和第一储氧部件,外层包括沉积在第二支撑材料上的铂和铑以及第二储氧部件。 第一和第二载体材料可以相同或不同,并且可以选自二氧化硅,氧化铝,二氧化钛,氧化锆,混合氧化物或其混合物,以及富含氧化锆的氧化锆/二氧化铈混合氧化物。 第一和第二氧气存储组分可以包括富铈氧化铈/氧化锆混合氧化物化合物,任选地包括镨,氧化钇,氧化钕,氧化镧或其混合物。

    Process for hydroformylation of olefinic compounds
    26.
    发明授权
    Process for hydroformylation of olefinic compounds 失效
    烯烃化合物加氢甲酰化方法

    公开(公告)号:US5874638A

    公开(公告)日:1999-02-23

    申请号:US755853

    申请日:1996-12-02

    CPC classification number: C07C45/50

    Abstract: A hydroformylation process for unsaturated compounds such as monoolefins and diolefins is carried out in an ionic medium in which the catalytic species is dissolved, but in which the reaction products (aldehydes) formed are only slightly soluble or are insoluble. The ionic medium is liquid at a temperature below 90.degree. C. and comprises at least one quaternary ammonium and/or phosphonium cation and at least one anion which is preferably selected from the group formed by tetrafluoroborate when the cation is ammonium, hexafluorophosphate, hexafluoroantimonate, hexafluoroarsenate, perfluoroalkylsulphonates, fluorosulphonate, bis-perfluoroalkylsulphonyl amides or dichlorocuprate, tetrachlorocuprate, tetrachloroaluminate, or trichlorozincate. At the end of the reaction, the organic phase is separated out and the polar phase containing the catalyst is used again.

    Abstract translation: 用于不饱和化合物如单烯烃和二烯烃的加氢甲酰化方法在其中溶解催化物质的离子介质中进行,但其中形成的反应产物(醛)仅仅是微溶或不溶解的。 离子介质在低于90℃的温度下是液体,并且包含至少一种季铵和/或鏻阳离子和至少一种阴离子,当阳离子是铵,六氟磷酸盐,六氟锑酸盐时,优选选自四氟硼酸盐形成的基团, 六氟砷酸盐,全氟烷基磺酸盐,氟磺酸盐,双全氟烷基磺酰胺或二氯磷酸盐,四氯磷酸盐,四氯铝酸盐或三氯酸锌。 在反应结束时,分离有机相,再次使用含有催化剂的极性相。

    Single layer high performance catalyst
    30.
    发明授权
    Single layer high performance catalyst 有权
    单层高性能催化剂

    公开(公告)号:US06524992B2

    公开(公告)日:2003-02-25

    申请号:US09818998

    申请日:2001-03-28

    Abstract: A single layer high performance catalyst containing on an inert carrier body a catalytic coating comprising platinum, rhodium and various oxide materials. The catalyst contains a catalytic coating having at least one first support material selected from the group having a first active alumina, a ceria rich ceria/zirconia mixed oxide and a zirconia component, said at least one first support material being catalyzed with a first part of the total platinum amount of the catalyst, and a second support material catalyzed with the second part of the total platinum amount and with rhodium said second support material being a second active alumina.

    Abstract translation: 在惰性载体上含有铂,铑和各种氧化物材料的催化涂层的单层高性能催化剂。 该催化剂含有具有至少一种选自具有第一活性氧化铝,富铈二氧化铈/氧化锆混合氧化物和氧化锆组分的第一载体材料的催化涂层,所述至少一种第一载体材料被第一部分催化 催化剂的总铂量,以及以总铂量的第二部分催化的第二载体材料,并且所述第二载体材料为第二活性氧化铝。

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