Recrystallization method of HNS (Hexanitrostilbene) and HNS prepared by this method

摘要

The present invention provides a method for recrystallizing HNS (Hexanitrostilbene), comprising the steps of: (a) preparing a solution by dissolving HNS in dimethylacetamide; (b) adding an anti-solvent to the prepared solution to form crystal nuclei; and (c) cooling the solution in which the crystal nuclei are formed, wherein the crystal nucleation in step (b) is performed under conditions of stirring the solution at 50 to 400 RPM, and the method for recrystallization of HNS HNS prepared by