Supercritical Fluid Extraction of Nitramine-Based Gun Propellant: A Fluid Survey

摘要

A survey of the extraction of RDX from M43 solid gun propellant was conductedusing 39 supercritical fluid systems, which included 36 carbon dioxide-based systems modified by the addition of small amounts of polar organic solvenL. These fluids were ranked by quantification of the mass of RDX extracted per unit mass of fluid. Correlations between the physical and chemical properties of the solvent modifiers and the fluid extraction efficiences were sought through detailed analysis of the extraction data. Modifier dipole moment and RDX solubility in the neat solvent were found to be important factors in the interpretation of the experimental results. The most effective carbon dioxide modifers for the extraction of RDX were found to be dimethylsulfoxide, octanenitrile, 1 -methyl-2-pyrrolidinone, dimethylformamide, butyrolactone, and acetonitrile.