PROCESS FOR PRODUCING AROMATIC CARBOXYLIC ACID

摘要

A process for advantageously producing an aromatic carboxylic acid such as terephthalic acid, in which the consumption of acetic acid solvent in steps for producing the aromatic carboxylic acid is minimized to heighten the industrial production efficiency. The process for producing an aromatic carboxylic acid includes oxidizing an alkylaromatic compound in a liquid phase using acetic acid as a solvent to generate a slurry containing the aromatic carboxylic acid, wherein the methyl acetate contained in the discharge gas generated in at least one step selected from steps succeeding the oxidization step, i.e., a crystallization step, solid-liquid separation step, drying step, and solvent recovery step, is separated and recovered and the methyl acetate recovered is returned to the oxidization step.