METHOD FOR PRODUCING SUCCINIC ACID

摘要

Provided are processes for producing high-purity succinic acid from a succinic-acid-containing liquid through crystallization. The invention relates to a process for producing succinic acid which comprises crystallizing succinic acid from a succinic-acid-containing liquid with stirring in a crystallization tank equipped with a stirrer, wherein a power required for the stirring per unit volume of the succinic-acid-containing liquid in the crystallization tank is 0.4-3 kW/m 3 , and a process for producing succinic acid which comprises crystallizing succinic acid from a succinic-acid-containing liquid in a crystallization tank, wherein the process comprises a crystallization step in which the succinic acid that has crystallized is discharged continuously or intermittently from the crystallization tank and a succinic-acid-containing liquid is fed continuously or intermittently to the crystallization tank, to keep the liquid level of the crystallization tank so as to be within a given range.