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8 条记录 (耗时 0.018 秒)

    Platinum, rhodium, and palladium catalyst for automotive emission control
    1.
    发明授权
    Platinum, rhodium, and palladium catalyst for automotive emission control 失效
    用于汽车排放控制的铂，铑和钯催化剂

    公开(公告)号：US4153579A

    公开(公告)日：1979-05-08

    申请号：US875616

    申请日：1978-02-06

    申请人： Jack C. Summers ,  Louis Hegedus

    发明人： Jack C. Summers ,  Louis Hegedus

    IPC分类号： B01D53/94 ,  B01J23/46 ,  B01J37/02 ,  B01J21/04 ,  B01J23/10 ,  B01J23/42 ,  B01J23/44

    CPC分类号： B01D53/945 ,  B01J23/464 ,  B01J37/024 ,  Y02T10/22

    摘要： A three-way layered catalyst for use in a stoichiometric air/fuel ratio system comprising an alumina support having deposited thereon the catalyst materials platinum, palladium and rhodium and having a first layer of platinum positioned at the support surface, a second layer of catalyst material selected from the group consisting of rhodium and a mixture of palladium and rhodium adjacent to and radially inward of the first layer with palladium inward of and adjacent to said second layer where the catalyst material of such layer is rhodium. Cerium oxide may be added to the support for improved performance.

    摘要翻译： 一种用于化学计量空气/燃料比体系的三元层状催化剂，其包含在其上沉积有催化剂材料铂，钯和铑并且具有位于支撑表面的第一铂层的氧化铝载体，第二层催化剂材料 选自铑和与第一层相邻且径向向内的钯和铑的混合物，其中钯层向内并邻近所述第二层，其中该层的催化剂材料为铑。 可以将氧化铈加入到载体中以改善性能。

    Catalyst for automotive emission control and method for making same
    2.
    发明授权
    Catalyst for automotive emission control and method for making same 失效
    用于汽车排放控制的催化剂及其制备方法

    公开(公告)号：US4152301A

    公开(公告)日：1979-05-01

    申请号：US913583

    申请日：1978-06-08

    申请人： Jack C. Summers ,  Louis Hegedus

    发明人： Jack C. Summers ,  Louis Hegedus

    IPC分类号： B01D53/94 ,  B01J23/40 ,  B01J37/02 ,  B01J21/04 ,  B01J23/42 ,  B01J23/44

    CPC分类号： B01D53/945 ,  B01J23/40 ,  B01J37/0244 ,  Y02T10/22

    摘要： A layered catalyst having significantly improved performance characteristics including greater resistance to poisoning and sintering in automotive exhaust comprising an alumina support having a first layer of platinum positioned at the support surface and penetrating the body thereof to a desired depth with a second layer of at least one of the catalytically active materials selected from the group consisting of rhodium and palladium, the second layer being adjacent to the first layer and penetrating the body of the support for a depth beyond that of the first layer, maximum concentration of platinum being in the first layer together with minimum concentration of the catalytically active materials, and minimum concentration of platinum with maximum concentration of the catalytically active materials being in the second layer. The catalyst is prepared by impregnation with separate solutions of the catalyst materials, acid treatment of the active sites of the support being used to block the sites from the surface through the desired depth of the platinum layer.

    Platinum-rhodium catalyst for automotive emission control
    3.
    发明授权
    Platinum-rhodium catalyst for automotive emission control 失效
    用于汽车排放控制的铂 - 铑催化剂

    公开(公告)号：US4128506A

    公开(公告)日：1978-12-05

    申请号：US871706

    申请日：1978-01-23

    申请人： Louis Hegedus ,  Jack C. Summers

    发明人： Louis Hegedus ,  Jack C. Summers

    IPC分类号： B01D53/94 ,  B01J23/46 ,  B01J37/02 ,  B01J21/04 ,  B01J23/42

    CPC分类号： B01D53/945 ,  B01J23/464 ,  B01J37/024 ,  Y02T10/22

    摘要： A three-way layered catalyst adapted for use in a system operating at about the stoichiometric air/fuel ratio having significantly improved resistance to poisoning in automotive exhaust comprising an alumina support having a first layer of the catalyst material platinum positioned at the support surface and penetrating the body thereof to a desired depth with an inner second layer of the catalyst material rhodium, the second layer being adjacent to the first layer and penetrating the body of the support, the maximum concentration of platinum being at or near the surface of the support with the minimum concentration of rhodium in the first layer being at or close to the surface and increasing in concentration to a maximum to define the boundary between the first and second layers, the concentrations of platinum and rhodium decreasing inwardly from the boundary with the greater portion of rhodium being in the second layer.

    摘要翻译： 适用于在大约化学计量空气/燃料比下操作的系统的三元层状催化剂具有显着提高的汽车尾气中毒性，包括具有位于支撑表面的催化剂材料铂的第一层的氧化铝载体，并且穿透 其主体具有催化剂材料铑的内部第二层的期望深度，第二层邻近第一层并穿透支撑体，铂的最大浓度在支撑体的表面处或附近， 第一层中铑的最小浓度处于或接近表面，并且浓度增加到最大以限定第一和第二层之间的边界，铂和铑的浓度从边界向内减少，其中较大部分 铑处于第二层。

    Stabilization of calcium oxide sulfate trapping materials
    6.
    发明授权
    Stabilization of calcium oxide sulfate trapping materials 失效
    氧化钙硫酸盐捕获材料的稳定化

    公开(公告)号：US4061593A

    公开(公告)日：1977-12-06

    申请号：US762676

    申请日：1977-01-26

    申请人： Jack C. Summers

    发明人： Jack C. Summers

    IPC分类号： B01D53/50 ,  C01F11/18 ,  C01F11/46 ,  B01J27/20 ,  B01J29/00

    CPC分类号： B01D53/508 ,  C01F11/18 ,  C01F11/464

    摘要： Sulfate absorbent calcium hydroxide is dispersed in a binder and pelletized. The pellets are exposed to carbon dioxide at elevated temperatures to convert at least a portion of the calcium hydroxide to calcium carbonate. Pellets so treated are suitable for prolonged use in fixed volume sulfur oxide and sulfate scrubber vessels.

    摘要翻译： 将硫酸盐吸收性氢氧化钙分散在粘合剂中并造粒。 将颗粒在升高的温度下暴露于二氧化碳，以将至少一部分氢氧化钙转化为碳酸钙。 如此处理的颗粒适合长期在固定体积的硫氧化物和硫酸盐洗涤器中使用。

    Lanthanum containing catalyst for treating automotive exhaust
    8.
    发明授权
    Lanthanum containing catalyst for treating automotive exhaust 失效
    含镧催化剂用于处理汽车尾气

    公开(公告)号：US4923842A

    公开(公告)日：1990-05-08

    申请号：US255245

    申请日：1988-10-11

    申请人： Jack C. Summers

    发明人： Jack C. Summers

    IPC分类号： B01D53/94 ,  B01J23/56 ,  B01J23/63 ,  B01J23/89 ,  B01J35/02 ,  B01J37/02

    CPC分类号： B01D53/945 ,  B01J23/63 ,  B01J23/89 ,  B01J37/024 ,  Y02T10/22

    摘要： This invention relates to an improved catalytic composite for treating an exhaust gas comprising a first support which is a refractory inorganic oxide, having dispersed thereon at least one oxygen storage component and at least one noble metal component and having dispersed immediately thereon an overlayer comprising lanthanum oxide and optionally a second support which is a refractory inorganic oxide. The first and second support may be selected from the group consisting of alumina, silica, titania, zirconia and aluminosilicates with alumina being preferred. Additionally, the noble metal component may be selected from the group consisting of platinum, palladium, rhodium, ruthenium and iridium. The oxygen storage component is an oxide of a metal which includes cerium, iron, nickel, cobalt lanthanum, neodymium, praesodymium, etc. and mixtures thereof. This invention also relates to a process for treating automotive exhaust comprising contacting the exhaust with the catalytic composite described above.The catalytic composite shows improved activity, especially for eliminating NO.sub.x, after extensive durability testing and also minimizes the formation of H.sub.2 S.

    摘要翻译： 本发明涉及一种用于处理废气的改进的催化复合材料，其包括作为耐火无机氧化物的第一载体，其上分散有至少一种储氧组分和至少一种贵金属组分，并且其上立即分散有包含氧化镧的覆层 和任选的第二载体，其是耐火无机氧化物。 第一和第二载体可以选自氧化铝，二氧化硅，二氧化钛，氧化锆和铝硅酸盐，氧化铝是优选的。 此外，贵金属组分可以选自铂，钯，铑，钌和铱。 储氧组分是包括铈，铁，镍，钴镧，钕，镨等的金属氧化物及其混合物。 本发明还涉及一种用于处理汽车尾气的方法，包括使排气与上述催化剂复合物接触。 催化复合材料在经过广泛的耐久性测试后显示出改善的活性，特别是用于消除NOx，并且还使H2S的形成最小化。