Abstract: A method for purifying solid borazane (NH3BH3 (s)) includes a) bringing solid borazane (NH3BH3 (s)) containing impurities into contact with a stream of gaseous ammonia (NH3 (g)) to obtain, by selective liquefaction of the borazane, a liquid phase containing liquefied borazane and ammonia and a solid phase constituted of at least a part of the impurities, b) separating the liquid and solid phases for recovery of the liquid phase, on the one hand, and of the solid phase, on the other hand; c) removing the ammonia from the recovered liquid phase, this removal causing precipitation of the purified borazane (NH3BH3 (s?)); and d) recovering the purified precipitated borazane (NH3BH3 (s?)).

Abstract: A method for purifying solid borazane (NH3BH3 (s)) includes a) bringing solid borazane (NH3BH3 (s)) containing impurities into contact with a stream of gaseous ammonia (NH3 (g)) to obtain, by selective liquefaction of the borazane, a liquid phase containing liquefied borazane and ammonia and a solid phase constituted of at least a part of the impurities, b) separating the liquid and solid phases for recovery of the liquid phase, on the one hand, and of the solid phase, on the other hand; c) removing the ammonia from the recovered liquid phase, this removal causing precipitation of the purified borazane (NH3BH3 (s)); and d) recovering the purified precipitated borazane (NH3BH3 (s?)).

Abstract: A method for producing borazane, includes the synthesis of the borazane by reacting (metathesis reaction) at least one ammonium salt with at least one borohydride, the at least one borohydride being selected from the alkali metal borohydrides and the alkali-earth metal borohydrides. The (metathesis) reaction is carried out with gaseous ammonia flushing; gaseous ammonia being co-liquefied with the at least one borohydride and gradually with borazane as the borazane is synthesized.