Electrochemical processes and apparatus for obtaining metals from metal salts, particularly separating alkali metal and borate ions from alkali metal borate compounds, are disclosed. Aqueous solutions of metal borates or metal carbonates are converted to metals by preferred electrochemical processes. These electrochemical processes also may be integrated into processes for the production of borohydrides, such as sodium borohydride.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 The invention was made with Government support under Cooperative Agreement No. DE-FC36-04G014008 awarded by the Department of Energy. The United States Government has certain rights in this invention.