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    • 70. 发明授权
    • Monolithic catalysts for conversion of sulfur dioxide to sulfur trioxide
    • 用于将二氧化硫转化为三氧化硫的单片催化剂
    • US5264200A
    • 1993-11-23
    • US915129
    • 1992-07-14
    • Timothy R. FelthouseAtis Vavere
    • Timothy R. FelthouseAtis Vavere
    • B01J23/42C01B17/78C01B17/69B01J35/04C01B17/74
    • B01J23/42C01B17/78Y02P20/584Y10S502/514Y10S502/516
    • Chemically and thermally stable monolithic catalysts are disclosed having platinum or alkali metal-vanadium active phases for use in the conversion of sulfur dioxide to sulfur trioxide. The platinum catalyst comprises a foraminous ceramic support which has at its wall surfaces a high surface area substrate for an active catalyst phase, and a combination of a platinum active phase and a promoter on the substrate. The substrate preferably comprises silica, provided, for example, by application of a silica washcoat. The promoter is selected from among compounds of zirconium, hafnium and titanium.The alkali-vanadium catalyst comprises a foraminous ceramic support having a porous silica substrate for the active phase at its foraminal wall surfaces. An alkali metal-vanadium active catalyst is in the pores of the porous silica.Methods for producing the catalysts of the invention are described, as is a method for producing sulfur trioxide with the platinum catalyst, in which the catalyst is regenerated with a mineral acid when activity has declined through aging or exposure to the conditions of the oxidation of sulfur dioxide.
    • 公开了化学和热稳定的整体式催化剂,其具有用于将二氧化硫转化为三氧化硫的铂或碱金属 - 钒活性相。 铂催化剂包括多孔陶瓷载体,其在其壁表面具有用于活性催化剂相的高表面积底物,以及在基材上的铂活性相和促进剂的组合。 底物优选包含二氧化硅,例如通过施加二氧化硅修补涂层提供。 助催化剂选自锆,铪和钛的化合物。 碱 - 钒催化剂包括多孔陶瓷载体,其具有用于活性相在其孔壁表面的多孔二氧化硅基质。 碱金属钒活性催化剂在多孔二氧化硅的孔中。 对本发明的催化剂的制造方法进行了说明,同时使用铂催化剂制造三氧化硫的方法,其中当活性通过老化下降或暴露于硫的氧化条件时,用无机酸再生催化剂 二氧化碳