利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

22 条记录 (耗时 0.029 秒)

    Emissions Treatment Catalysts
    9.
    发明申请
    Emissions Treatment Catalysts 审中-公开
    排放处理催化剂

    公开(公告)号：US20100124523A1

    公开(公告)日：2010-05-20

    申请号：US12621346

    申请日：2009-11-18

    申请人： Shau-Lin F. Chen ,  Tian Luo ,  Michael P. Galligan ,  Harold Rabinowitz

    发明人： Shau-Lin F. Chen ,  Tian Luo ,  Michael P. Galligan ,  Harold Rabinowitz

    IPC分类号： B01D53/94 ,  B01J23/10

    CPC分类号： B01D53/945 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/2042 ,  B01D2255/206 ,  B01D2255/20715 ,  B01D2255/2092 ,  B01D2255/407 ,  B01D2255/9025 ,  B01D2255/908 ,  B01D2255/9202 ,  B01D2255/9207 ,  B01J23/42 ,  B01J23/44 ,  B01J23/464 ,  B01J23/63 ,  B01J35/006 ,  B01J37/0203 ,  B01J37/0244 ,  B01J37/0248 ,  Y02T10/22

    摘要： An emissions treatment catalyst formed using pH-compatible ingredients is disclosed. Engine exhaust treatment systems including such catalysts are also provided. Methods of making and using these catalysts are also provided. Methods include creating precious metal-support composites where the precious metal precursor has a solution pH that is compatible an aqueous slurry pH of the support. In one example, a basic precious metal solution having a pH of 7 or greater is mixed with a promoted refractory metal oxide support having an aqueous slurry pH of 7 or greater. On the other hand, an acidic precious metal solution having a pH of less than 7 is mixed with a promoted refractory metal oxide support having an aqueous slurry pH of less than 7. The mixture of the salt and the promoted refractory metal oxide support can be thermally treated at a temperature of at least 180° C. to thermally fix the well-dispersed precious metal on the support. Complex ions of basic solutions and include tetraamine nitrate, tetraamine hydroxide, tetraamine acetate, a primary amine nitrate, a primary amine hydroxide, a primary amine acetate, or combinations thereof. The refractory metal oxide support can be promoted by oxides of lanthanum, barium, zirconium, neodymium, yttrium, praseodymium, somarium, ceria, or combinations thereof.

    摘要翻译： 公开了使用pH兼容成分形成的排放物处理催化剂。 还提供了包括这种催化剂的发动机废气处理系统。 还提供了制备和使用这些催化剂的方法。 方法包括制备贵金属载体复合物，其中贵金属前体具有与载体的水性浆液pH相容的溶液pH。 在一个实例中，将pH为7或更大的碱性贵金属溶液与具有7或更大的水性浆料的促进的难熔金属氧化物载体混合。 另一方面，将pH值小于7的酸性贵金属溶液与具有小于7的水性浆液的促进的难熔金属氧化物载体混合。盐和促进的难熔金属氧化物载体的混合物可以是 在至少180℃的温度下热处理以将分散好的贵金属热固定在载体上。 碱性溶液的复合离子包括硝酸四胺，氢氧化四胺，乙酸四胺，伯胺硝酸盐，伯胺氢氧化物，伯胺乙酸盐或其组合。 难熔金属氧化物载体可以由镧，钡，锆，钕，钇，镨，钐，二氧化铈或其组合的氧化物促进。