PROCESS FOR PRODUCING TEREPHTHALIC ACID

摘要

A process for producing a high-purity aromatic dicarboxylic acid, e.g., terephthalic acid, through simplified steps at a high energy efficiency. The process for producing terephthalic acid as a given target compound is characterized in that a solid-liquid separation step and a cleaning step are conducted in one apparatus and that in the step of removing a residual liquid adherent to a terephthalic acid cake by evaporation, at least part of the evaporation of the residual liquid is conducted by means of the internal energy possessed by the terephthalic acid cake and/or residual liquid.