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US 8,133,288 B2Granted
Aqueous borohydride compositions
AssigneeMontgomery Chemicals LLC
InventorsCharles Arthur Lumsden, Thomas Hugh Evans
Life of this patent
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Abstract
An aqueous fuel for generating hydrogen includes alkaline aqueous composition of about 17 to 37 mole percent of a sodium borohydride, and from about 0.001 to 1 mole percent of sodium hydroxide.
Claims4
A process for preparing an alkaline aqueous borohydride composition, the process comprising:
- mixing a feedstock of a dilute alkaline aqueous solution of sodium borohydride with a polar, non-aqueous solvent that is a better solvent for the sodium borohydride than for the base;
- extracting sodium borohydride from the alkaline aqueous solution into the non-aqueous phase;
- separating the non-aqueous solution of sodium borohydride from the aqueous phase;
- concentrating the initial non-aqueous solution of sodium borohydride to provide a predefined concentration of sodium borohydride by evaporating the non-aqueous solvent;
- adding a predefined amount of an alkaline stabilizing agent to the concentrated non-aqueous solution of sodium borohydride to provide a product, the product including residual non-aqueous solvent;
- and
- separating the residual non-aqueous solvent from the product to provide a concentrated product.
4 more elements
Dependencies are inferred from the claim text.