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

January 05, 2023

Titanium Dioxide is an inorganic compound with the chemical formula TIO2. It is a white solid or powdered zwitterionic oxide with a molecular weight of 79.866. It is non-toxic, has the best opacity, whiteness, and brightness, and is considered the best performing white pigment in the world today. Titanium dioxide has strong adhesion and is not easily affected by chemical changes, making it always snow-white. Widely used in industries such as coatings, plastics, papermaking, printing inks, chemical fibers, rubber, cosmetics, etc. It has a high melting point and is also used to manufacture refractory glass, glaze, enamel, clay, high-temperature resistant experimental vessels, etc. Titanium dioxide can be extracted by acid decomposition of rutile or obtained by decomposition of titanium tetrachloride. There are three allotropes of titanium dioxide in nature: rutile type, rutile type, and plate type.

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.

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