Determination of Titanium Dioxide in Titanium Ore Acid Hydrolysis Solution by Ammonium Ferric Sulfate Titration

The soluble titanium in the acid digestion leaching solution mostly exists in the form of titanium oxysulfate, which can be reduced to trivalent titanium with aluminum flakes in the presence of hydrochloric acid, and then titrated with ferric salt standard solution to all trivalent titanium It becomes tetravalent titanium. When one drop is excessive, the ferric ion and the indicator thiocyanate (CNS-) form a red complex to indicate the end.