Patent ID: 9227981
Filing Date: 2016-01-05
CPC Classification: C07D

Claim Text:
1. A method of preparation of ε-2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane with reduced impact sensitivity by precipitation of a solution of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane in a solvent by an antisolvent, characterized in that phosphorus(V) oxide is added as a recrystallization promoter to the solution of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane in the solvent, the obtained mixture is stirred and filtered, and the filtrate is subsequently precipitated by the addition of the antisolvent.