A method for producing methacrylic acid synthesis catalyst, a catalyst for methacrylic acid synthesis and production method of methacrylic acid

摘要

PROBLEM TO BE SOLVED: To provide a new method for producing a catalyst for synthesizing methacrylic acid which catalyst is used when methacrylic acid is synthesized by gas phase contact oxidation of methacrolein with molecular oxygen, a catalyst for synthesizing methacrylic acid, which is obtained by the method, and has high activity and high methacrylic acid-selectivity, and a method for producing methacrylic acid in a high yield using the catalyst.;SOLUTION: This method for producing a catalyst for synthesizing methacrylic acid comprises the steps of mixing a solid A (an atom ratio of Mo:X is 12:2.5 to 12:12) containing at least molybdenum, phosphorus and X (X is at least one kind of element selected from the group consisting of potassium, rubidium, cesium, and thallium) with a water slurry B (an atom ratio of Mo:X is 12:0.05 to 12:0.4) containing at least molybdenum, phosphorus and X, and baking the mixture at 300-500°C.;COPYRIGHT: (C)2002,JPO