Patent ID: 7838668

Claim:
A method for crystallizing sucralose comprising: Dissolving a concentrate or a solid that contains sucralose into a mixed solvent, which comprises two solvents with different boiling points, wherein the solvent with a lower boiling point has a higher solubility to sucralose than the solvent with a higher boiling point; stirring the mixture thus obtained to dissolve sucralose completely; concentrating the solution thus obtained by distilling off the solvent under reduced pressure; after the solvent with a lower boiling point having been distilled off, cooling the solution and allowing it to stand and crystallize; and obtaining crystalline sucralose after filtrating and drying; wherein the solvent with a lower boiling point is selected from a group consisting of methanol and ethanol, and the solvent with a higher boiling point is selected from a group consisting of propyl acetate, butyl acetate, pentyl acetate, isopentyl acetate, n-butanol, isobutanol, n-pentanol, and secondary amyl alcohol.