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2008 | 10 | 3 | 4-12
Tytuł artykułu

The influence of admixtures on the course of hydrolysis of titanyl sulfate

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The study focused on the question how admixtures, such as iron(II), iron(III), magnesium and aluminium salts influence the degree of TiOSO4 conversion to hydrated titanium dioxide (HTD). Titanyl sulfate solution, an intermediate product in the industrial preparation of titanium dioxide pigments by sulfate route was used. The admixtures were added to the solution and their concentration was gradually changed. It was found that hydrolysis clearly depended on Fe(II) and Fe(III) concentrations. The higher the concentration of iron(II) (up to 5 wt %) in the solution was, the higher conversion degree was achieved. A reverse relationship was observed concerning the influence of iron(III) introduced up to 1.5 wt %. The constant rates of both phases of titanyl sulfate hydrolysis (including the formation of an intermediate colloidal TiO2 and final products) depended on iron(II) and iron(III) content in the solution. The concentration of other constituents did not influence hydrolysis in the investigated part of the process (up to 2.6 wt % of Mg and up to 0.3 wt % of Al). However, the size of primary particles of the obtained TiO2·nH2O did not depend on the content of the above-mentioned constituents in the solution.
Wydawca

Rocznik
Tom
10
Numer
3
Strony
4-12
Opis fizyczny
Daty
wydano
2008-01-01
online
2008-10-08
Twórcy
  • Institute of Chemical and Environment Engineering, Szczecin University of Technology, ul. Pułaskiego 10, 70-322 Szczecin, Poland
autor
  • Institute of Chemical and Environment Engineering, Szczecin University of Technology, ul. Pułaskiego 10, 70-322 Szczecin, Poland
autor
  • Institute of Chemical and Environment Engineering, Szczecin University of Technology, ul. Pułaskiego 10, 70-322 Szczecin, Poland
  • Institute of Chemical and Environment Engineering, Szczecin University of Technology, ul. Pułaskiego 10, 70-322 Szczecin, Poland
Bibliografia
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  • Skudlarski, K. (1974). Technologia produkcji tytanu i dwutlenku tytanu. Prace Naukowe Instytutu Chemii Nieorganicznej i Metali Pierwiastków Rzadkich, Politechnika Wrocławska, 22.
  • Ullmann's Encyclopedia of Industrial Chemistry. (2002). Weinheim: Wiley-VCH Verlag GmbH.
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  • Titanium Dioxide Pigments. Manufacture and general properties. (1999). Lincoln House: England.
  • Dobrovolskii, I.P. (1988). Khimia i tekhnologia oksidnyh sojedinenii titana (The chemistry and technology of the oxide compounds of titanium). Sverdlovsk: UrO AN SSSR.
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  • Mecklenburg, W. (1930). U.S. Patent No. 1,758,528. Washington, D.C.: U.S. Patent and Trademark Office.
  • Bavykin, D.V., Dubovitskaya, V.P., Vorontsov, A.V. & Parmon, V.N. (2007). Effect of TiOSO4 hydrotermal hydrolysis conditions on TiO2 morphology and gas-phase oxidative activity. Res. Chem. Intermediat. 33/3-5, 449-464. DOI: 10.1163/156856707779238702.
  • Sathyamoorthy, S., Moggridge, G.D., and Hounslow M.J. (2001). Particle Formation during anatase precipitation of seeded titanyl sulfate solution. Cryst. Growth Des. 1, 123-129. DOI: 10.1021/cg0000013.[Crossref]
  • Bavykin, D.V., Savinov, E.N. & Smirniotis, P.G. (2003). Kinetics of the TiO2 films growth at the hydrothermal hydrolysis of TiOSO4. React. Kinet. Catal. L. 79/1, 77-84. DOI: 10.1023/A:1024107701071.[Crossref]
  • Hidalgo, M.C. & Bahnemann, D. (2005). Highly photoactive supported TiO2 prepared by thermal hydrolysis of TiOSO4: Optimisation of the method and comparison with other synthetic routes. Appl. Catal. B-Envirom. 61, 259.[Crossref]
  • Grzmil, B., Grela, D. & Kic, B. (2006). Studies on the hydrolysis process of titanium sulfate compound. Polish Journal of Chemical Technology. 8(3), 19-21.
  • Grzmil, B., Grela, D. & Kic, B. (2008). Studies On The Hydrolysis Process of Titanium Sulfate Compounds. Chem. Pap. 62(1), 18-25. DOI: 10.2478/s11696-007-0074-8.[Crossref]
  • Tolchev, A.V., Pervushin, V. Yu. & Kleshchev, D.G. (2001). Hydrolysis of Titanium(IV) Sulfate Solutions under Hydrothermal Conditions. Russ. J. Appl. Chem. 74(10), 1631-1635.
  • Fogler, H.S. (2006). Elements of Chemical Reaction Engineering. Upper Saddle River: Pearson Education International.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_v10026-008-0029-z
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