Method for extending cathode life
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United States of America Patent
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Nov 9, 1982
Grant Date -
N/A
app pub date -
May 21, 1981
filing date -
May 21, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is provided for extending the life of transition metal-based cathodes used in chlor-alkali diaphragm cells by adding a small amount of a reducing agent, such as Na.sub.2 SO.sub.3 or urea, to the electrolytic solution during periods of interrupted current flow to the cell. The reducing agent reacts with the sodium hypochlorite which is dissolved in the electrolytic solution to prevent the oxidation, and hence dissolution, of the transition metal in the cathode coating.
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