Process Optimization for Synthesis of Guanylurea Dinitramide (GUDN)

Abstract

Abstract Guanylurea dinitramide (GUDN), a stable salt of dinitramidic acid has good thermal stability and is a potential candidate for insensitive munitions. The synthesis process involves nitration of the ammonium salt of sulfamic acid with conc. HNO 3 /H 2 SO 4 at −20 °C to −50 °C and further treatment with an aqueous suspension of guanylurea sulfate to obtain GUDN as white crystalline solid in 50 % yield. In order to optimize the process parameters to get the product in higher yield and greater purity, a systematic study with variation of different parameters like molar ratio of nitrating mixture, conditioning time, and temperature was carried out.