| 摘要 |
PROBLEM TO BE SOLVED: To obtain a catalyst having higher reactivity and selectivity and a longer service life than the conventional catalyst. SOLUTION: This catalyst is a partially neutralized salt of a hetero-polyacid represented by the formula, Pa Mob Vc Sbd Cue Xf Og . Starting materials for this catalyst except starting material for V and/or starting material for Sb are mixed, dissolved or suspended in water and heated at 80-200 deg.C for 1-24hr in the presence of ammonium radicals, starting material for V and/or starting material for Sb is added, they are heated again at 80-200 deg.C for 1-24hr and then firing is carried out. |
