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    Recovery of precious metal and other values from spent compositions/materials
    2.
    发明授权
    Recovery of precious metal and other values from spent compositions/materials 失效
    从废弃的组合物/材料中回收贵金属和其他价值

    公开(公告)号：US06455018B1

    公开(公告)日：2002-09-24

    申请号：US08441113

    申请日：1995-05-15

    申请人： Jean-Pierre Cuif

    发明人： Jean-Pierre Cuif

    IPC分类号： C22B1100

    CPC分类号： C22B11/048 ,  B01J37/0036 ,  B01J38/60 ,  C22B3/10 ,  C22B11/04 ,  Y02P10/214 ,  Y02P10/234

    摘要： Precious metal values, e.g., platinum, palladium and rhodium, and, optionally, other valuable elements, e.g., one or more rare earths and cerium in particular, are recovered from a wide variety of compositions of matter and articles of manufacture, for example waste or spent catalysts such as vehicular postcombustion catalysts, by (i) optionally comminuting such composition/article into a finely divided state, (ii) intimately admixing the composition/article with sulfuric acid, (iii) calcining the resulting admixture at a temperature ranging from 150° to 450° C., and (iv) leaching the calcined admixture in an aqueous medium, whether simultaneously or separately, with H+ ions and chloride ions, whereby obtaining (1) a solid residue substantially depleted of such precious metal values and, optionally, of such other elements, and (2) at least one liquid solution comprising such precious metal values and, optionally, such other elements.

    摘要翻译： 贵金属值，例如铂，钯和铑，以及任选的其它有价值的元素，例如一种或多种稀土和铈，特别是从各种各样的物质和制品组成中回收，例如废物 或废催化剂，例如车辆后燃烧催化剂，通过（i）任选地将该组合物/制品粉碎成细碎状态，（ii）将组合物/制品与硫酸充分混合，（iii）在所述混合物的温度范围内煅烧所得混合物， 150℃至450℃，以及（iv）将所煅烧的混合物在水性介质中，与H +离子和氯离子同时或分开地浸出，从而获得（1）基本上不含这种贵金属值的固体残余物， 任选的这些其他元素，和（2）至少一种包含这种贵金属值的液体溶液和任选的这种其它元素。

    Cerium and zirconium oxides, mixed oxides and solid solutions having improved thermal stability
    6.
    发明授权
    Cerium and zirconium oxides, mixed oxides and solid solutions having improved thermal stability 失效
    铈和锆氧化物，具有改善的热稳定性的混合氧化物和固溶体

    公开(公告)号：US5747401A

    公开(公告)日：1998-05-05

    申请号：US730554

    申请日：1996-10-15

    申请人： Jean Pierre Cuif

    发明人： Jean Pierre Cuif

    IPC分类号： B01J23/10 ,  C01F7/00 ,  C01G25/00 ,  C01G25/02 ,  C04B35/48 ,  C01F17/00 ,  C01G57/00

    CPC分类号： C01G25/02 ,  B01J23/10 ,  C01F7/00 ,  C01G25/00 ,  C01P2002/54 ,  C01P2006/12 ,  C01P2006/90

    摘要： Mixed oxides of cerium and zirconium as well as solid solutions and cerium oxides are produced having improved thermal stability. The process involves the formation of cerium and zirconium oxides, mixed oxides and solid solutions by methods such as co-thermohydrolysis and co-precipitation, followed by washing or impregnating with an alkoxylated compound having greater than 2 carbon atoms. After the washing or impregnating step, the mixture is calcined to form oxides having very high surface area and oxygen storage capacity. The improved thermal stability of the oxides makes them advantageous for use in applications such as catalytic converters.

    摘要翻译： 生产铈和锆的混合氧化物以及固溶体和氧化铈，其具有改进的热稳定性。 该方法包括通过诸如共热水解和共沉淀的方法形成铈和锆氧化物，混合氧化物和固溶体，然后用具有大于2个碳原子的烷氧基化化合物洗涤或浸渍。 在洗涤或浸渍步骤之后，将混合物煅烧以形成具有非常高的表面积和储氧能力的氧化物。 氧化物的改进的热稳定性使其在用于催化转化器等应用中是有利的。