Direct Process
Potassium chloride in aqueous solution is electrolyzed by using titanium oxide coated titanium anode and mild steel cathode in an Electrolyzer. D.C current is passed. Potassium chloride is converted in to potassium chlorate. Due to its low solubility potassium chlorate is separated.
KCl + 3H2O → KClO3 + 3H2
In-direct Process
Potassium chlorate is prepared by double decomposition method. Initially sodium chlorate is prepared by electrolytic oxidation of Sodium chloride solution in an electrolytic cell.
Sodium chlorate is then reacted with potassium chloride. By double decomposition method potassium chlorate is produced.
NaCl + 3H2O → NaClO3 + 3H2
NaClO3 + KCl → KClO3 + NaCl