METHOD OF FEEDING SOLUTION OF CRUDE TEREPHTHALIC ACID TO REACTOR

摘要

A method of feeding an aqueous solution of crude terephthalic acid to a reactor in such a manner that the inner wall of this reactor does not suffer a local decrease in wall thickness or breakage. In a process for producing high-purity terephthalic acid which comprises dissolving in water crude terephthalic acid obtained by oxidizing p-xylene in an acetic acid solvent, reducing this solution with hydrogen in a reactor in the presence of a catalyst, crystallizing the reduction product, and separating it by solid-liquid separation, the method of feeding the solution of the crude terephthalic acid to the reactor comprises regulating the rate of introduction of the crude terephthalic acid solution into the reactor to 1 m/s or lower.