Stable Synthesis of Potassium Ferrate(VI) with High Purity

A pure potassium ferrate(Ⅵ) can be prepared by hypochlorous salt oxidation stably. Raw materials ,reaction time and temperature would have an effect on production rate and purity of potassium ferrate(Ⅵ). Its optimization conditions for synthesis are: Fe(NO_3)_3·9H_2O, excess of NaClO solution and home-made composite stabilizer react with saturate NaOH solution at 20 ℃ in 1.5 h. After gotten rid of the salts , saturate KOH solution was added in filtrate at 20 ℃ in 15 min, potassium ferrate(Ⅵ) was separated out and purified by process of recrystallization, washing organic contaminants and drying . The results show that home-made composite stabilizer and the condition of purification are very important to synthesize pure potassium ferrate(Ⅵ) stably.