| abstract |
An object of the present invention is to provide a method for producing a catalyst capable of producing methacrolein, isobutyraldehyde or isobutyric acid by vapor phase catalytic oxidation to produce methacrylic acid with high yield and high selectivity. (A) Each compound containing any of Mo, V, P, Cu, Cs or NH 4 is mixed with water to prepare an aqueous solution or aqueous dispersion of these compounds (hereinafter referred to as a slurry liquid). A step, (b) a step of drying the slurry liquid obtained in step (a) to obtain a dried slurry, (c) a step of firing the dried slurry obtained in step (b) to obtain a fired product, (d ) Filtering the mixture of the fired body obtained in step (c) and water, filtering the aqueous solution and water-insoluble matter, and (e) drying the water-insoluble matter obtained in step (d). And a step of obtaining a dried product of water-insoluble matter, and a method for producing a catalyst for producing methacrylic acid by gas phase catalytic oxidation of methacrolein, isobutyraldehyde or isobutyric acid. |