Process for obtaining a charge of hexanitrohexaazaisowurtzitane crystals having a rounded morphology; charge and corresponding energetic material

摘要

The present invention provides a process for obtaining a charge of hexanitrohexaazaisowurtzitane crystals having rounded morphology. It also provides said charge, the energetic material comprising it, and a process for manufacturing said material. Said process for obtaining said charge comprises:
preparing a saturated solution of any polymorphic form of hexanitrohexaazaisowurtzitane in a mixture comprising both an organic solvent for said hexanitrohexaazaisowurtzitane and an organic nonsolvent for said hexanitrohexaazaisowurtzitane, said solvent being more volatile than said nonsolvent;seeding this saturated solution with a few hexanitrohexaazaisowurtzitane crystals; and thenconcentrating the seeded, saturated solution by at least partial evaporation of the solvent, said evaporation of the solvent being performed at a temperature of between 35° C. and 15° C. and at a pressure adjusted, to plus or minus 12 mbar, to the boiling pressure of the solvent in said solution, throughout the process of evaporating said solvent from said solution.

主权项

1. A process for obtaining a charge of hexanitrohexaazaisowurtzitane crystals, said process comprising:
preparing a saturated solution of any polymorphic form of hexanitrohexaazaisowurtzitane in a mixture comprising both an organic solvent for said hexanitrohexaazaisowurtzitane and an organic nonsolvent for said hexanitrohexaazaisowurtzitane, said organic solvent being more volatile than said organic nonsolvent; seeding the saturated solution with a few hexanitrohexaazaisowurtzitane crystals to form a seeded saturated solution; and then concentrating the seeded saturated solution by at least partial evaporation of the organic solvent, said evaporation of the organic solvent being performed at a temperature of from 35° C. to 15° C. and at a pressure that is in a range from a boiling pressure of the organic solvent in the seeded saturated solution plus 1.2×103 Pa (12 mbar) to the boiling pressure of the organic solvent in the seeded saturated solution minus 1.2×103 Pa (12 mbar) throughout the process of evaporating said organic solvent from said seeded saturated solution.