| 摘要 |
PURPOSE:To obtain a catalyst having a high catalytic activity by thermally decomposing a catalyst precursor containing Mo and V and/or Nb at a given temperature in a given oxygen concentration of atmosphere by an indirect heating method. CONSTITUTION:A mixture of the compounds of Mo and V and/or Nb is mixed with water, together with a support, etc., as needed, and the mixture is then precipitated, dried, and molded to obtain a catalyst precursor X. Then, the catalyst precursor X is housed in the tube 1 of a heat exchange type container into which a gas containing 0.05-5% oxygen is introduced. Then, a heating fluid is passed through a housing 3 outside the tube 1 to heat and decompose the catalyst precursor X inside the tube 1 at 300-550 deg.C. |
