Electrolytic cell for producing chlorine—sodium hydroxide and method of producing chlorine—sodium hydroxide
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United States of America Patent
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Apr 19, 2016
Grant Date -
Jun 20, 2013
app pub date -
Oct 1, 2010
filing date -
Jul 13, 2010
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Abstract
There is provided a method of production of chlorine.sodium hydroxide capable of being operated stably and economically by preventing calcium from being deposited in an ion exchange membrane. The liquid retention layer 3 having a liquid retention amount per unit volume of the liquid retention layer of 0.10 g-H2O/cm3 or more and 0.80 g-H2O/cm3 or less is put between the ion exchange membrane 12 and the gas diffusion electrode 16. Calcium ions transferred through the ion exchange membrane 12 easily diffuse, thereby making it possible to suppress increase in an electrolytic voltage and drop in current efficiency generated by deposition of the calcium ions inside the ion exchange membrane 12.
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