METHOD FOR PRODUCING SODIUM BOROHYDRIDE Russian patent published in 2023 - IPC C01B6/21 C01B35/00 C01B3/06 

FIELD: inorganic chemistry.

SUBSTANCE: sodium borate, aluminium powder and fluoride powder are mixed in a sealed reactor filled with hydrogen gas, and the mixture is reacted at a temperature of not less than 410°C and not more than 560°C to obtain sodium borohydride. The invention can be used in the production of sodium borohydride used as a source of hydrogen. The method for producing sodium borohydride includes mixing sodium borate, aluminium powder and fluoride powder in a sealed reactor filled with hydrogen gas, and carrying out the reaction of the mixture at a temperature not lower than 410°C and not higher than 560°C. Sodium borate is one or more compounds selected from sodium metaborate, sodium tetraborate and sodium diborate. The fluoride is one or more selected from sodium fluoride NaF, sodium hexafluoroaluminate Na₃ AlF₆, potassium fluoride KF, potassium tetrafluoroaluminate KAlF₄, aluminum fluoride AlF₃ and lithium fluoride LiF.

EFFECT: simplification of the production of sodium borohydride and increasing its yield.

4 cl, 22 dwg, 5 tbl, 25 ex