Preparation method 3 of polymeric ferric sulfate

Preparation method 3 of polymeric ferric sulfate

Sodium hypochlorite oxidation method:
Sodium hypochlorite is an alkaline oxidant with a high oxidation-reduction potential, theoretically capable of oxidizing ferrous to trivalent iron
2NaClO + 2H2SO4—→K2SO4+ 2H2O + Cl2
The produced chlorine gas is still an oxidant, which can oxidize ferrous to trivalent iron. But a small amount of chlorine gas will escape in the form of gas and be wasted, which cannot be fully utilized. At the same time, it can also cause environmental pollution and require post-processing procedures. Sodium hypochlorite is an alkaline oxidant, and when preparing polymeric ferric sulfate, the amount of H2SO4 used is relatively high in order to lower the pH value. The polymeric ferric sulfate prepared by this method has poor stability and is not suitable for long-term storage.