| 摘要 |
1,257,335. Oxidation/ammoxidation catalysts. STANDARD OIL CO. 17 Dec., 1968 [20 Dec., 1967 (3)], No. 59833/68. Heading B1E. [Also in Divisions C2 and C5] A catalyst comprises U x Mo y O z wherein x is 1-25, y is 1-25 and z is such as to balance the valences, and/or AS x U y O z wherein x is 1-10, y is 1-25 and z is such as to balance the valences, and/or Sba U b Mo c O d wherein a is 3-15, b is 1-3, c is 0.001-0.5 and d is such as to balance the valences, each composition being formed by heating the mixed oxides or their precursors in the presence of O 2 and absence of reducing gas at a temperature above 500‹F. and below the melting or sublimation point of the component oxides. Each catalyst may be promoted by different elements chosen from Ce, Sb, W, Zn, Mn, Fe, Cr, Bis, Co, Ni, Sn, V, B, Mo and As. Examples describe oxides of U, Mo; U, As; Sb, U, Mo; U, Mo, Fe, Bi; Sb, U, Mo, Fe; Mo, U, As; containing SiO 2 . They are prepared by suspending SiO 2 in a solution of compounds of some or all of the components, heating until gelled, drying, calcining; and mixing with a SiO 2 suspension, drying and calcining; or impregnating with further components or more of an original component, heating and drying the catalyst may be activated by reduction. |
