Method for regulating and controlling crystal form in glycine crystallization process

The invention provides a method for regulating and controlling a crystal form in a glycine crystallization process, and relates to the technical field of crystal material preparation. The method for regulating and controlling the crystal form in the glycine crystallization process 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; carrying out first cooling on the mixed solution, adding a seed crystal when the mixed solution is cooled to the temperature of a metastable zone, carrying out second cooling to a crystal growing temperature, and carrying out constant-temperature crystal growing under the condition of the crystal growing temperature, so as to obtain a solid-liquid suspension; and carrying out solid-liquid separation on the solid-liquid suspension to obtain a glycine crystal product. According to the invention, by controlling the selective generation of single cr