Process for removing chlorate salt from aqueous alkali chloride solution
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United States of America Patent
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Jan 18, 1994
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N/A
app pub date -
Nov 29, 1991
filing date -
Nov 28, 1990
priority date (Note) -
Expired
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Abstract
The invention relates to processes for removing chlorate salts from an aqueous alkali chloride solution employed in cation-exchange membrane electrolysis, comprising the steps of adding hydrochloric acid to an aqueous alkali chloride solution to form a reaction solution, and maintaining the absolute pressure of the reaction solution at a range not higher than 600 mmHg and not lower than the saturated vapor pressure of the solution in a decomposition vessel and/or feeding the reaction solution to the bottom portion of a decomposition vessel and causing the reaction solution to flow upward in the decomposition vessel.
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