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Titanium Dioxide Chemical Properties

May 04, 2017

With the molten barium carbonate to produce barium titanate (adding barium chloride or sodium carbonate as a cosolvent

TiO2 + BaCO3 = BaTiO3 + CO2 ↑

Do not dissolve in water or dilute sulfuric acid, but can be dissolved in hot concentrated sulfuric acid or molten potassium hydrogen sulfate

TiO2 + H2SO4 = TiOSO4 + H2O

Titanium dioxide dissolved in hot concentrated sulfuric acid solution is acidic, but the heating and boiling can also be hydrolyzed to get insoluble in acid, alkali hydrated titanium dioxide (β-type titanic acid). If the alkali is added to the newly prepared titanium hydrochloric acid solution, fresh hydrated titanium dioxide (α-titanic acid) is obtained, its reactivity is greater than β-type titanic acid, soluble in dilute acid and concentrated alkali. Dissolved in concentrated sodium hydroxide solution, from the solution can be precipitated chemical formula Na2TiO3 · H2O hydrate titanate.

Titanium dioxide and carbon powder pressed into a group and after coking, heated to 1070-1170K, can be made of gaseous titanium tetrachloride.

TiO2 + 2Cl2 + 2C = TiCl4 ↑ + 2CO ↑

This reaction is important for the extraction of titanium, magnesium or sodium can be easily reduced titanium tetrachloride.

The reaction of titanium dioxide with chlorinated reagents such as COCl2 (phosgene), SOCl2 (dichlorosulfoxide), CHCl3 (trichloromethane), CCl4 (carbon tetrachloride) can also be used to prepare titanium tetrachloride

TiO2 + CCl4 = TiCl4 ↑ + 2CO2 ↑ (completed at 770K)

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