METHOD TO PRODUCE CRYSTALS OF NEEDLE-SHAPED TETRANITROPENTAERYTRITE Russian patent published in 2012 - IPC C30B7/00 C30B29/62 C30B29/54 C06B21/00 C07C203/04 

FIELD: explosives.

SUBSTANCE: invention relates to a technology of explosive substances (ES) and may be used in detonators and other explosive devices using a process of ES burning changeover into explosion. The method consists in production of tetranitropentaerytrite solution in acetone, deposition of tetranitropentaerytrite crystals by addition of the produced solution while it is mixed into a precipitator at the ratio of 1:(2-3), further filtration of the produced residue and drying, at the same time the precipitator is the solution of isopropyl alcohol in water at the ratio of (2-9):1. The tetranitropentaerytrite solution prior to addition into the precipitator is heated to the temperature of 35-45°C. An ultradispersed aluminium powder may be added to the precipitator. The needle shape of tetranitropentaerytrite produced by the stated method makes it possible to improve conditions of transition processes when forming detonation in an ES charge.

EFFECT: method is safe, there are no operations of intensive mechanical exposure at ES and no toxic dissolvents heated to temperatures close to temperature of their boiling.

3 cl, 2 dwg, 3 ex