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US 7,247,286 B2Granted
Process for production of sodium borohydride from sodium aluminum hydride with recycle of byproducts
AssigneeRohm and Haas Company
InventorEugene Christopher Ashby
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Abstract
A process for production of sodium borohydride. The process comprises the steps of: (a) combining a boric acid ester, B(OR)3 and sodium aluminum hydride to produce sodium borohydride and Al(OR)3; and (b) combining Al(OR)3 and sulfuric acid to produce alum and ROH.
Claims2
A process for production of sodium borohydride;
- said process comprising steps of:
- (a) combining a boric acid ester precursor and an alcohol, ROH;
- wherein R represents alkyl having at least three carbon atoms, aryl or aralkyl;
- to produce a boric acid ester, B(OR)3;
- (b) combining sodium, aluminum and hydrogen to produce sodium aluminum hydride;
- (c) combining the boric acid ester and the sodium aluminum hydride to produce sodium borohydride and Al(OR)3 and separating sodium borohydride and Al(OR)3 by dissolving Al(OR)3 in a hydrocarbon solvent;
- and
- (d) combining the Al(OR)3 produced in step (c) and sulfuric acid to produce alum and ROH;
- wherein ROH produced in step (d) is recycled to step (a).
6 more elements
Dependencies are inferred from the claim text.