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AssigneesChlorine Engineers Corp., Ltd., Kaneka Corporation, Toagosei Co., Ltd.
InventorsTomonori Idutsu, Koji Saiki, Yukinori Iguchi, Kiyohito Asaumi
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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.
An electrolytic cell which is divide into an anode chamber and a cathode chamber by an ion exchange membrane, comprising an anode installed in said anode chamber, and a liquid retention layer and a gas diffusion electrode which are installed in said cathode chamber, wherein an electrolysis is conducted while supplying the brine into said anode chamber and an oxygen-containing gas into said cathode chamber, respectively;
Dependencies are inferred from the claim text.