Method for purifying quaternary ammonium hydroxides
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United States of America Patent
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Jul 3, 1990
Grant Date -
N/A
app pub date -
Nov 28, 1988
filing date -
Nov 28, 1988
priority date (Note) -
Expired
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Abstract
A process for treating solutions of quaternary ammonium hydroxide containing latent halide to lower the latent halide content of the solution comprises the steps of (A) providing an electrolytic cell comprising an anode and a cathode wherein the cathode comprises zinc, cadmium, tin, lead, copper or titanium or alloys thereof, mercury or mercury amalgam, (B) charging a solution containing at least one quaternary ammonium hydroxide which contains latent halide into the electrolytic cell, (C) passing a current through the electrolytic cell to lower the latent halide content in the solution, and (D) recoverying the quaternary ammonium hydroxide solution from the electrolytic cell.
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