Electrochemical production of KNO.sub.3 /NaNO.sub.3 salt mixture

Details Electrochemical production of KNO.sub.3 /NaNO.sub.3 salt mixture Electrochemical production of KNO.sub.3 /NaNO.sub.3 salt mixture

1981-11-16

1984-08-14

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204128, 204296, 423395, 423194, 423202, 423164, C25G 134

Patent

active

044655681

ABSTRACT:
A process for the electrolytic production of a chloride-free mixture consisting essentially of sodium and potassium nitrates is disclosed. In this process, an anolyte brine comprised of a mixture of sodium and potassium chlorides dissolved therein is electrolyzed in a membrane type electrolysis type cell to produce a mixed alkali metal hydroxide catholyte solution. The catholyte is reacted with nitric acid to form a mixed potassium-sodium nitrate solution. By properly adjusting the ratio of potassium chloride to sodium chloride concentration in the anolyte brine, a final nitrate product containing about from about 40% to about 80% NaNO.sub.3 and from about 60% to about 20% KNO.sub.3 by weight can be produced. The resulting product, after drying is suitable for use in many solar panel heat transfer applications.

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