THERMALLY-STABILIZED PRILLED AMMONIUM DINITRAMIDE PARTICLES, AND PROCESS FOR MAKING THE SAME

摘要

A process is disclosed for producing prills comprised of ammonium dinitramide. The prills can include, if desired, one or more thermal stabilizers, and processing aid(s). Solid particulate ADN is introduced into the top of a melting column, allowed to melt to form pre-prills while passing through a hot-zone ('heated zone') in the prilling column. The pre-prills are allowed to spheridize in the presence of an upwardly blown inert medium which is counter current to the path of the ADN in the prilling column. The flow is designed not to blow the ADN out of the prilling column. The rate of spheridization (prill formation) can, if desired, be accelerated by providing additional cooling, such as refrigeration, to the cooling zone in the prilling column. The ADN prills are suitable for use in propellants.