Method for producing a catalyst for unsaturated carboxylic acid synthesis

A method for producing a catalyst for unsaturated carboxylic acid synthesis, the method comprising:

• (i) obtaining a dried product by drying and heat-treating a starting material mixed liquid in which supply source compounds of respective catalyst component elements are integrated;
• (ii) forming a catalyst precursor by supporting powder to be supported on a carrier comprising a particle aggregate, the powder to be supported being either the dried product or obtained from the dried product;
• and
• (iii) calcining the catalyst precursor to form the catalyst,
• wherein a first mass loss rate of the powder to be supported at 300° C. is less than 5 percent by mass, and a difference between a second mass loss rate of the powder to be supported at 370° C. and the first mass loss rate of the powder to be supported at 300° C. is not less than 1 percent by mass and not more than 6 percent by mass, and
• wherein the first mass loss rate of the powder to be supported at 300° C. and the second mass loss rate of the powder to be supported at 370° C. are calculated from the following formula based on masses of the powder to be supported before and after heating the powder to be supported to 300° C. and 370° C., respectively, in an air atmosphere until there is no change in mass:
• mass loss rate (percent by mass)=[(mass of the powder to be supported before heating (g)−mass of the powder to be supported after heating (g))/mass of the powder to be supported before heating (g)]×100.