| abstract |
The present invention relates to a process for producing a catalyst for use in a gas-phase contact ammoxidation reaction of propane, comprising a combination step of obtaining a raw material combination liquid by dissolving or dispersing a raw material, a first drying step of drying the raw material combination liquid to obtain a dried body, A calcining step of calcining the dried body to obtain a complex oxide having a predetermined composition; and a step of calcining the dried body to obtain a composite oxide having a predetermined composition from a group consisting of tungsten, molybdenum, tellurium, niobium, vanadium, boron, bismuth, manganese, iron, antimony, phosphorus and rare earth elements A step of impregnating the impregnated composite oxide with a solution containing at least one specific element selected to obtain a composite oxide after impregnation and a second drying step of drying the impregnated composite oxide, wherein at least one of the impregnation step and the second drying step Either one of them is mixed with the complex oxide or the composite oxide after the impregnation It provides a process for the preparation of a process for impregnating or dry catalyst. |