| abstract |
The present invention relates to a process for producing a high quality aromatic carboxylic acid having a larger average particle diameter. More specifically, the present invention includes the step of liquid phase oxidation of an aromatic hydrocarbon compound in a polar organic solvent with an oxygen-containing gas in the presence of a mixed catalyst of a metal catalyst, bromine compound, imide compound and zirconium compound, the aromatic The hydrocarbon compound is provided so as to be 20 to 80% by weight based on the total amount of the polar organic solvent and the aromatic hydrocarbon compound, to provide an aromatic carboxylic acid having an average particle diameter of 140 to 300 µm. |