METHOD FOR MANUFACTURING CATALYST, METHOD FOR MANUFACTURING UNSATURATED CARBOXYLIC ACID, METHOD FOR MANUFACTURING UNSATURATED ALDEHYDE AND UNSATURATED CARBOXYLIC ACID, AND METHOD FOR MANUFACTURING UNSATURATED CARBOXYLIC ACID ESTER

A catalyst is provided with which a target product can be manufactured with high selectivity. The present invention is a method for manufacturing a catalyst that is used when subjecting unsaturated aldehyde to gas-phase catalytic oxidation using molecular oxygen and manufacturing unsaturated carboxylic acid, the catalyst containing at least molybdenum and phosphorus, wherein the method for manufacturing the catalyst includes a step for exposing a catalyst precursor containing a nitrogen-containing component to a pressure exceeding atmospheric pressure, and firing the catalyst precursor. 本发明提供能够以高选择率制造目标产物的催化剂。本发明涉及一种催化剂的制造方法，是利用分子态氧对不饱和醛进行气相催化氧化而制造不饱和羧酸时使用的至少含有钼和磷的催化剂的制造方法，包括将含有含氮成分的催化剂前体暴露在超过大气压的压力下而进行煅烧的工序。