| 摘要 |
PROBLEM TO BE SOLVED: To produce a good catalyst by a method in which raw material compounds are mixed in advance and burned at a temperature in a specified range after being dried, and a small amount of a specified component to activated catalyst precursor, and base substance metal oxide particles is immersed, dried, and burned again. SOLUTION: To base substance metal oxide particles containing molybdenum, bismuth, iron, and silica prepared by burning at a temperature of 450-750 deg.C after drying in advance, a component comprising Mox Biy Fez Aa Bb (wherein Mo is molybdenum: Fe is iron; Bi is bismuth; A is an element selected from the group consisting of chromium, zirconium, lanthanum, and cesium; B is an element selected from the group consisting of phosphorus, boron, tellurium, potassium, and rubidium; (x), (y), (z), (a), and (b) are atomic ratios) is immersed and burned at a temperature of 450-700 deg.C again after being dried. |
