抄録
Some of the electrolytic conditions for the bittern with sodium hydroxide addition were studied, i. e. anode current density (DA) which may cause corrosion and heating of PbO2anode, and cathode current density (DK) which may deterinine the available chlorine in magnesium bleaching powder, and temperature of electrolysis which may govern the rate of magnesium bleaching powder formation and CIO-ion concentration.
The optimum DAof PbO2anode was found to be less than 0.2A/cm2, with which DA, no corrosion and heating of the PbO2anode was observed. The effect of DK on the available chlorine content was remarkable, and crystalline and easily filterable magnesium bleaching powder of good quality, with about 44% available chlorine, was obtained at DKof less than 0.2A/cm2.
The optimum temperature of electrolysis was found to be about 30°C. A larger scale apparatus of 20A input was constructed and comparable good results were obtained.
