METHOD FOR PRODUCING PYROMELLITIC ANHYDRIDE

摘要

PROBLEM TO BE SOLVED: To provide a method for inexpensively producing high-purity pyromellitic anhydride. SOLUTION: This method for producing pyromellitic anhydride comprises using a catalyst containing vanadium and molybdenum and/or tungsten and catalytically oxidizing a 2,4,5-trialkylbenzaldehyde with a molecular oxygen- containing gas in a vapor phase.