| abstract |
Formula P a Mo b V c X d Y e Z f O g (wherein P, Mo, V, X, Y, Z, a, b, c, d, e, f and g are described in the specification When preparing a catalyst for producing methacrylic acid by molding the catalyst component represented by the above formula), a catalyst that can obtain methacrylic acid in high yield by adding a polymer organic compound having an average particle diameter of 0.01 to 10 μm and heat-treating it before use is provided. do. |