EXPERIMENTAL STUDIES OF DEPENDENCE OF THE VALUE OF SPECIFIC ELECTRIC CONDUCTIVITY OF THE ELECTROCHEMICAL CELL OF MEMBRANE ELECTROLYZER FROM CONCENTRATION OF PROCESSED SODIUM HYDROXIDE AND ITS TEMPERATURE
The results of experimental studies of the dependence of the electrical conductivity of the electrochemical cell of a membrane electrolyzer on the concentration of the treated sodium hydroxide solution and its temperature are presented. It was shown that an increase in the concentration of sodium hydroxide in the electrolyte with Cp = 250 g/l to Cp = 750 g/l leads to a decrease in the specific conductivity of the electrochemical cell from ? = 0.20-0.57 (Ohm ? cm)-1 to ? = 0.04-0.30 (Ohm ? cm)-1, and an increase in the electrolyte temperature from ? = 20 ?С to ? = 60 ?С leads to an increase in the electrical conductivity electrochemical cell with ? = 0.04-0.20 (Ohm ? cm)-1 to ? = 0.30-0.57 (Ohm ? cm)-1. Mathematical dependences are obtained that describe changes in the value of the electrical conductivity of an electrochemical cell with a change in the concentration and temperature of the electrolyte. Using the proposed calculation method optimizes the process of electrochemical generation of sodium ferrate in a membrane electrolyzer with soluble iron anodes.