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Preparation of high-purity titanium salts from the system (NH4)2TiF6-(NH4)3FeF6-NH4F-H2O

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Abstract

Influence of NH4F concentration on the conditions of separation of Ti(IV) and Fe(III) salts by fractional hydrolysis under the action of ammonia in the system (NH4)2TiF6-(NH4)3FeF6-NH4F-H2O was studied. The coprecipitation of (NH4)3TiO2F5 and (NH4)3FeF6 as a result of crystallochemical substitution of Fe+3 for Ti+4 makes it possible to reduce the content of Fe(III) salts in the system. After separation of a precipitate containing up to 25% of Ti from solutions with NH4F concentrations from 10.6 to 22.3% and subsequent hydrolysis, the remaining titanium precipitates. The precipitate is annealed up to 800°C in the presence of water vapor to form TiO2 with a whiteness above 92%.

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Authors and Affiliations

  1. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, pr. 100-letiya Vladivostoka 159, Vladivostok, 690022, Russia

    N. G. Bakeeva, P. S. Gordienko & E. V. Pashnina

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  1. N. G. Bakeeva
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  2. P. S. Gordienko
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  3. E. V. Pashnina
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Correspondence to N. G. Bakeeva.

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Original Russian Text © N.G. Bakeeva, P.S. Gordienko, E.V. Pashnina, 2009, published in Zhurnal Obshchei Khimii, 2009, Vol. 79, No. 1, pp. 3–8.

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Bakeeva, N.G., Gordienko, P.S. & Pashnina, E.V. Preparation of high-purity titanium salts from the system (NH4)2TiF6-(NH4)3FeF6-NH4F-H2O. Russ J Gen Chem 79, 1–6 (2009). https://doi.org/10.1134/S1070363209010010

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  • DOI: https://doi.org/10.1134/S1070363209010010

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