| 摘要 |
PROBLEM TO BE SOLVED: To provide a catalyst which can produce an unsaturated aldehyde and/or an unsaturated carboxylic acid, preferably acrolein and/or acrylic acid, or methacrolein and/or methacrylic acid, in a high yield, and to provide a method for producing an unsaturated aldehyde and/or an unsaturated carboxylic acid using the catalyst.SOLUTION: There is provided a catalyst for producing an unsaturated aldehyde and/or an unsaturated carboxylic acid, the catalyst comprising molybdenum and bismuth as essential components, where a turbidity of a mixture of ammonium molybdate used as a raw material of molybdenum, and water, is 30 NTU or less. Thus, the catalyst affords the unsaturated aldehyde and/or the unsaturated carboxylic acid in higher yields. |
