Method for generating high concentration chlorine dioxide by means of electrolysis

Abstract

A method for generating high concentration chlorine dioxide having purity over 90% by means of an electrolytic procedure using an electrolytic material prepared from NaCl and NaClO 2 subject to the control of optimal operation parameters of current 80˜110 Amp, concentration of sodium chloride to be 20˜25% sodium chloride and sodium chlorite to be 5% minimum, operation temperature 55˜65° C., and material feeding speed 30˜50 ml/min. Under the effect of ClO 2 after 20 minutes, no bacteria count is detectable, and bacteria count Log value of SPA water of aerobic count 1.5×10 5 CFU/mL is dropped by 1.46 Log CFU/g in 120 ppm ClO 2 . Therefore, the ClO2 preparation method of the invention is an economical and convenient process suitable for on-line continuous disinfection or sterilization application.

1 . A method for generating high concentration chlorine dioxide having purity over 90%, comprising the step of mixing sodium chloride and sodium chlorite to provide an electrolytic material, and the step of putting said electrolytic material thus obtained into an electrolyzer for enabling the sodium chloride in said electrolytic material to be electrolyzed to produce chloride for causing the sodium chlorite in said electrolytic material to make a reduction and to produce chlorine dioxide subject to the control of optimal operation parameters of current, concentration, operation temperature and material feeding speed. 
   
   
       2 . The method for generating high concentration chlorine dioxide as claimed in  claim 1 , wherein said optimal operation parameters are current 80˜110 Amp, concentration of said electrolytic material to be 20˜25% sodium chloride and at least 5% sodium chlorite, operation temperature 55˜65° C., and material feeding speed 30˜50 ml/min. 
   
   
       3 . The method for generating high concentration chlorine dioxide as claimed in  claim 2 , wherein the concentration of sodium chlorite is most preferably within 5˜10%.