To provide a method of producing catalyst for producing methacrylic acid by which methacrolein is subjected to gas phase contact oxidation by molecular oxygen to produce the methacrylic acid at high yield.
In a method of producing catalyst for producing methacrylic acid including: (a) a preparation step of preparing aqueous slurry or mixture solution containing a catalyst component; (b) a drying step of drying the aqueous slurry or the mixture solution to obtain dried substance particles; (c) a shaping step of shaping the dried substance particles to obtain a shaped product; and (d) a heat treatment step of subjecting the shaped product to heat treatment. A value of a median size (d50: unit μm) of the dried substance particles is in a range of d50≤60, a value d10/d50 obtained by dividing a value of a particle size (d10: unit μm) corresponding to 10% of cumulative frequency distribution of the dried substance particles by d50 is in a range of 0.41≤d10/d50≤0.79, and a value d90/d50 obtained by dividing a value of a particle size (d90: unit μm) corresponding to 90% of the cumulative frequency distribution of the dried substance particles by d50 is in a range of 1.21≤d90/d50≤1.89.
KITAZONO KENICHI
KATO HIROKI
FUJITA TSUTOMU
KONDO MASAHIDE
Next Patent: APPARATUS FOR CLEANING FLUE GAS OF INDUSTRIAL SHREDDER