Process for the preparation of an alkali borohydride such as lithium borohydride
AssigneeCommissariat a l'Energie Atomique
InventorsStephane Lorthioir, Claude Humbert-Droz, Serge Trennoy
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Abstract
The invention relates to a process for the preparation of an alkali metal borohydride. According to this process, a mixture of an alkali metal hydride, boric anhydride and a hydrogenation catalyst such as Raney nickel is raised to a temperature of 250.degree. to 300.degree. C. under a hydrogen atmosphere. This gives an alkali metal borohydride, such as lithium-n borohydride, in accordance with the following reaction: 4LiH+B.sub.2 O.sub.3 .fwdarw.LiBH.sub.4 +Li.sub.3 BO.sub.3, with a yield which can reach 93.3% at a temperature of 300.degree. C.
Claims11
A process for the preparation of an alkali metal borohydride which comprises catalytically hydrogenating boric anhydride with alkali metal hydride in the presence of hydrogen and a hydrogenation catalyst.
Dependencies are inferred from the claim text.