Method for treating saccharin sodium crystallization mother liquor

The invention relates to the technical field of chemical production, and discloses a method for treating saccharin sodium crystallization mother liquor, which comprises the following steps: S1, adding a mixed solution of methyl isobutyl ketone and cyclohexane with the volume ratio of 1: 1.2 into the saccharin sodium crystallization mother liquor with the concentration of 5-40%, stirring, separating the liquid, carrying out reduced pressure distillation on an organic phase to recover a solvent, and entering the next step by a water phase; the use amount of the solvent is 0.1-3 times of the weight of the saccharin sodium mother liquor, preferably 0.8-1.5 times, and more preferably 1.2 times; the stirring temperature is 10-60 DEG C, preferably 30-60 DEG C, and more preferably 58 DEG C. According to the method disclosed by the invention, the saccharin sodium can be directly recovered from the mother liquor and does not need to be converted into other salt types. Compared with the prior art, the method has the rem