Feasibility evaluation of the nitration of potassium sulfamate using a small continuous reactor

抄録

Ammonium dinitramide (ADN)-based high energetic ionic liquids are promising new liquid rocket propellants that can replace hydrazine due to their high energy density and handling properties. In this study, aiming at realizing stable ADN supplies, we focused on the synthesis of dinitramide salts using a small (μL to several mL) continuous reactor. Due to the small capacity of the reactor, it can efficiently remove the heat generated from the reaction, and the dinitramide salts can be safely synthesized. To investigate the feasibility of the synthesis with the small continuous reactor system, we fabricated a test reactor with transparent resin and tried to synthesize dinitramic acid (HDN). The ultraviolet (UV) spectrometry of the products at the reactor outlet showed that they absorbed UV rays at 〜285 nm. The absorption of the dinitramide anion was observed even at higher synthetic temperatures than those of typical syntheses in batch reactors. These results showed that the fabricated small continuous reactor allows the safe synthesis of dinitramide salts even at relatively high temperatures due to its high heat removal efficiency.