| 摘要 |
Aq. slurry (I) contg. SiO2 sol, a polyvalent metal cpd. (II) and an antimony component (III) is heated and dried to form a solid and the solid calcined to obtain a catalyst prod. (IV). To obtain (III), Sb2O3 is added to aq. slurry contg. at least one of antimonic or polyantimonic acid or their salts so that the total amt. of Sb provided by the Sb2O3 is from 1-70 atomic % of the Sb in slurry (I) before drying. - Pref. (II) is esp. a cpd. of Fe, Co, Ni, V, W, Mo, Ce etc. Heating and drying of (I) is partic. via a spray drying method. Calcination is pref. in a fluidised bed, e.g. 500-950 deg.C. Prods. (IV) obtd. are esp. of the type MeaSbbXcQdRe Of(SiO2)g where M is Fe, Co, Ni, Ce etc. X is V, Mo or W, Q is Li, Cs, Mg, Zr etc., R is B, P, Te or Bi, a is 5-15, b is 5-100, c is 0-15, d is 0-50, e is 0-10, g is 10-200, f is a number corresp. to the oxide formed when all components are bound together. |
