Patent ID: 8211287

Claim:
A sulfuric acid electrolysis process used in an electrolytic cell having an anode compartment separated from a cathode compartment by a diaphragm, a conductive diamond anode installed in said anode compartment, and a cathode installed in said cathode compartment, comprising the steps of: supplying electrolyte containing sulfuric acid for electrolysis to said anode compartment and said cathode compartment, respectively, from outside; and performing electrolysis to generate oxidizing agent in an anolyte in said anode compartment, wherein a temperature of said electrolyte containing sulfuric acid supplied to said anode compartment and said cathode compartment is controlled to be 30 degree Celsius or more; a flow rate F1 (L/min.) of said electrolyte containing sulfuric acid supplied to said anode compartment is controlled to be 1.5 times or more (F1/Fa≧1.5) a flow rate Fc (L/min.) of gas formed on an anode side as calculated from Equation (1) shown below; and a flow rate F2 (L/min.) of said electrolyte containing sulfuric acid supplied to said cathode compartment is controlled to be 1.5 times or more (F2/Fc≧15) a flow rate Fc (L/min.) of gas formed on a cathode side as calculated from Equation (2) shown below: Fa =( I×S×R×T )/(4×Faraday constant) Equation (1) Fc =( I×S×R×T )/(2×Faraday constant) Equation (2) I: Electrolytic current (A) S: Time: 60 second (Fixed) R: Gas constant (0.082 1·atm/K/mol) K: Absolute temperature (273.15 degree Celsius+T degree Celsius) T: Electrolysis temperature (degree Celsius) Faraday constant: (C/mol).