Preparation of sodium ferrate by separated electrolytic cell

Using separated electrolytic cell to prepare sodium ferrate,the influences of electrolyte concen-tration,electrolysis time,electric current,temperature and various kinds of electrolytes on the sodium ferrate concentration were investigated.The optimal technical parameters for the sodium ferrate preparation by the said method were determined through orthogonal test.The research indicated that,the stability of the Na2FeO4 prepared by the electrolyte with 0.02-0.03 mol/L iodate ion added was the best;the optimal condition for Na2FeO4 preparation was: the temperature was 45 ℃,the electrolyte concentration was 14 mol/L,the dosage of iodate ion was 0.020 mol/L,the electric current was 2.0 A,the electrolysis time was 3.0 hours.The concentration of the sodium ferrate prepared under the above condition was 60.44 mmol/L.