Patent ID: 9133036
Filing Date: 2015-09-15
Classification: C01B

Abstract:
1. A method for obtaining borazane, comprising the implementation of the successive stages below: a) providing a solution of borazane in a solvent consisting of tetrahydrofuran containing less than 100 ppm of water; wherein said borazane has been synthesized by reaction of at least one ammonium salt with at least one alkali metal borohydride and/or alkaline earth metal borohydride in said solvent, or said borazane has been dissolved in said solvent after having been synthesized by reaction of at least one ammonium salt with at least one alkali metal borohydride and/or alkaline earth metal borohydride in tetrahydrofuran containing less than 100 ppm of water; b) precipitation of the borazane by addition to said solution of a non-solvent of borazane, containing less than 100 ppm of water, and selected from the group consisting of chlorinated solvents, fluorinated solvents, linear, branched and cyclic alkanes, and mixtures thereof; c) recovery of said precipitated borazane; d) optionally drying said recovered precipitated borazane; e) hot dissolution, at a temperature lower than the decomposition temperature of the borazane, of said optionally dried recovered precipitated borazane, in a solvent from the alcohol family, having a molecular weight greater than or equal to 60 g/mol and containing less than 100 ppm of water; f) hot removal of impurities insoluble in said solvent; g) precipitation of the borazane dissolved in said solvent by cooling; h) recovery of the borazane precipitated in step g); and i) optionally drying said recovered borazane from step h).