METHOD FOR REGULATING AND CONTROLLING CRYSTAL FORM IN GLYCINE CRYSTALLIZATION PROCESS

The present invention relates to the technical field of preparation of crystal materials, and provides a method for regulating and controlling a crystal form in a glycine crystallization process. The method for regulating and controlling the crystal form in the glycine crystallization process provided by the present invention comprises the following steps: heating and mixing glycine and water to obtain a glycine aqueous solution; mixing the glycine aqueous solution with a salt additive to obtain a mixed solution; performing first cooling on the mixed solution, adding a seed crystal when the mixed solution is cooled to the temperature of a metastable zone, performing second cooling to a crystal growing temperature, and performing constant-temperature crystal growing under the condition of the crystal growing temperature, so as to obtain a solid-liquid suspension; and performing solid-liquid separation on the solid-liquid suspension to obtain a glycine crystallization product. According to the present invention