| abstract |
PURPOSE:To improve the reaction rate and the yield of products by depositing a platinum group element as the first component, an element such as Sn as the second component, and an rare-earth element as the third component on an inorg. carrier, and specifying the ratios of the first component to the second and third components. CONSTITUTION:(a) One or more kinds of elements selected from platinum group elements, (b) >=1 kind of element selected from a group consisting of Sn, Bi, Ce, Te, and Sb, and (c) >=1 kind of element selected from rare-earth elements are deposited on an inorg. carrier to obtain the catalyst composition for an oxidation reaction. In this case, the atomic ratio (b/a) of the (a) component to the (b) component is controlled to 0.001-10, and the atomic ratio (c/a) of the (a) component to the (c) component is adjusted to 0.01-5. Besides, 0.1-20wt% (a) component, 0.001-20wt% (b) component, and 0.01-20wt% (c) component are respectively deposited. The catalyst is used when a carboxylic or ketonic compd. is produced by oxidizing a hydroxylic or aldehydic compd. (excluding saccharides). |