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Thermal characterization of hydrous tungsten oxides and their behavior as ion exchanger

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Abstract

The preparation, and thermal characterization and ion exchanger behavior of hydrous tungsten oxides obtained from purified tungsten trioxide, by processing of a Brazilian scheelite ore were described. By an alkaline fusion of tungsten trioxide with an excess of sodium carbonate at 900°C an intermediate tungstate product is obtained. Acid lixiviation of the tungstate intermediary in different experimental conditions produces two different hydrous tungsten oxides I and II respectively. A third material was produced by thermal treatment of II, yielding the material IIA, a monohydrate species. The materials prepared were characterized by TG/DTG, X-ray diffractometry and by surface area measurements. Their ion exchange behavior was studied too, using Na+ and K+ ions as the exchanged species. The inorganic exchanger materials were partially regenerated and may be used consecutively.

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References

  1. K. Dorfner, 'Ion exchangers', Gruyter, New York 1991.

    Google Scholar 

  2. M. Qureshi and K. G. Varshney, 'Inorganic Ion Exchangers in Chemical Analysis', CRC Press, Boca-Raton, Ann Arbor, Boston 1991.

    Google Scholar 

  3. A. M. Morley, J. Chem. Soc., 2 (1930) 1987.

    Article  Google Scholar 

  4. S. W. H. Yil and C. T. Wang, 'Tungsten sources, metallurgy, properties and applications', Plenum Press, New York 1979.

    Google Scholar 

  5. M. L. Fredman, 'The tungstic acids', Contribution from Refractory Metals Laboratory, General Electric Co., 81 (1959) 3834.

    Google Scholar 

  6. N. H. Furman, 'Standard Methods of Chemical Analysis, 6th Ed., R. E. Krieger Publ. Co., Hutington, New York 1975, Vol. 1.

    Google Scholar 

  7. N. D. Chowdhury and A. K. De, Chromatographia, 11 (1978) 586.

    Google Scholar 

  8. A. Clearfield, 'Inorganic Ion Exchange Materials', CRC Press, Boca-Raton, Florida, 1982, Vol. 1, p. 163.

    Google Scholar 

  9. C. Airoldi and S. F. Oliveira, J. Braz. Chem. Soc., 3 (1992) 47.

    CAS  Google Scholar 

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Authors and Affiliations

  1. Department of Chemical Engineering of Faculdade de Engenharia Química de Lorena, p.o. box 116, 12600-000, Lorena, s.p, Brazil

    M. L. C. P. da silva, I. M. Miguel & G. L. J. P. da silva

Authors
  1. M. L. C. P. da silva
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  2. I. M. Miguel
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  3. G. L. J. P. da silva
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Correspondence to M. L. C. P. da silva.

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da silva, M.L.C.P., Miguel, I.M. & da silva, G.L.J.P. Thermal characterization of hydrous tungsten oxides and their behavior as ion exchanger. Journal of Thermal Analysis and Calorimetry 71, 493–500 (2003). https://doi.org/10.1023/A:1022847708572

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