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    • 2. 发明授权
    • Catalyst compositions and methods of making the same
    • 催化剂组合物及其制备方法
    • US4727052A
    • 1988-02-23
    • US879684
    • 1986-06-27
    • Chung-Zong WanJoseph C. Dettling
    • Chung-Zong WanJoseph C. Dettling
    • B01D53/94B01J21/04B01J23/40B01J23/42B01J23/44B01J23/46B01J23/56B01J23/58B01J23/63B01J23/64B01J23/652B01J23/89B01J37/02B01J37/18F02B1/04
    • B01D53/945B01J21/04B01J23/40B01J23/63B01J37/0242F02B1/04Y02T10/22
    • 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.
    • 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。
    • 6. 发明授权
    • Layered catalyst composite
    • 层状催化剂复合材料
    • US5597771A
    • 1997-01-28
    • US265076
    • 1994-06-24
    • Zhicheng HuChung-Zong WanYiu-Kwan LuiJoseph C. Dettling
    • Zhicheng HuChung-Zong WanYiu-Kwan LuiJoseph C. Dettling
    • B01D53/86B01D53/94B01J23/44B01J23/46B01J23/63B01J23/89B01J35/00B01J37/02F01N3/10F01N3/28B01J21/04B01J23/02
    • B01D53/945B01J23/63B01J35/0006B01J37/0244B01D2255/902F01N2570/16Y02T10/22
    • The present invention relates to a layered catalyst composite of the type generally referred to as a three-way conversion catalyst having the capability of substantially simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides. The structure of the layered catalyst composite of the present invention is designed wherein there is a first layer and a second layer. The first layer comprises a first support; at least one first palladium component and an oxygen storage component in intimate contact with the palladium component; optionally another first platinum group metal component; a zirconium component; at least one first alkaline earth metal components and at least one first rare earth metal component selected from the group consisting of lanthanum metal components and neodymium metal components. The second layer comprises a second support; at least one second palladium component; optionally another second platinum group metal component; at least one second alkaline earth metal component; at least one second rare earth component selected from the group consisting of lanthanum metal components and neodymium metal components and a zirconium component.
    • 本发明涉及一种通常称为三元转化催化剂的层状催化剂复合物,其具有基本上同时催化烃和一氧化碳的氧化和还原氮氧化物的能力。 设计本发明的层状催化剂复合材料的结构,其中存在第一层和第二层。 第一层包括第一载体; 至少一种第一钯组分和与钯组分紧密接触的储氧组分; 另外的第一铂族金属组分; 锆组分; 至少一种第一碱土金属组分和至少一种选自镧金属组分和钕金属组分的第一稀土金属组分。 第二层包括第二支撑件; 至少一个第二钯组分; 另一种第二铂族金属组分; 至少一种第二碱土金属组分; 选自由镧金属成分和钕金属成分组成的组中的至少一种稀土类成分和锆成分。