Convenient procedure for the conversion of sodium borohydride into lithium borohydride in simple ether solvents

1981 ◽  
Vol 20 (12) ◽  
pp. 4454-4456 ◽  
Author(s):  
Herbert C. Brown ◽  
Yong Moon. Choi ◽  
S. Narasimhan
Keyword(s):  
Sodium Borohydride ◽  
Lithium Borohydride ◽  
Convenient Procedure ◽  
Ether Solvents

scholarly journals Efficient Synthesis of Alkali Borohydrides from Mechanochemical Reduction of Borates Using Magnesium–Aluminum-Based Waste

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1061 ◽  
Author(s):  
Thi Thu Le ◽  
Claudio Pistidda ◽  
Julián Puszkiel ◽  
Chiara Milanese ◽  
Sebastiano Garroni ◽  
...  
Keyword(s):  
Sodium Borohydride ◽  
Mechanical Milling ◽  
Argon Atmosphere ◽  
High Conversion ◽  
Efficient Synthesis ◽  
Conversion Yield ◽  
Lithium Borohydride ◽  
Molar Ratios ◽  
Milling Parameters ◽  
High Conversion Yield

Lithium borohydride (LiBH4) and sodium borohydride (NaBH4) were synthesized via mechanical milling of LiBO2, and NaBO2 with Mg–Al-based waste under controlled gaseous atmosphere conditions. Following this approach, the results herein presented indicate that LiBH4 and NaBH4 can be formed with a high conversion yield starting from the anhydrous borates under 70 bar H2. Interestingly, NaBH4 can also be obtained with a high conversion yield by milling NaBO2·4H2O and Mg–Al-based waste under an argon atmosphere. Under optimized molar ratios of the starting materials and milling parameters, NaBH4 and LiBH4 were obtained with conversion ratios higher than 99.5%. Based on the collected experimental results, the influence of the milling energy and the correlation with the final yields were also discussed.

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