PRODUCTION OF CHLORINE DIOXIDE AQUEOUS SOLUTION AND APPARATUS THEREFOR

PROBLEM TO BE SOLVED: To provide a production process for chlorine dioxide aqueous solution that eliminates the defect that troublesome concentration adjustment of the hypochlorite solution with an expensive measuring device in order to suppress the chlorine content low, the manufacturing equipment therefor, an easier method for producing chlorine dioxide including a small amount of chlorine, the maintenance-free manufacturing equipment for chlorine dioxide. SOLUTION: Chlorous acid aqueous solution, hypochlorite aqueous solution and acid aqueous solution are fed from their individual tanks 04, 05, 06 via individual metering pumps 01, 02, 03 to the line mixer 10, respectively, while the dilution water 12 is fed via the flow controller to the line mixer. At this time, the hypochlorite salt is excessively fed to the chlorite salt stoichiometrically to produce aqueous chlorine dioxide solution containing less than 15 wt.% of chlorine based on the chlorine dioxide formed.