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Separation of titanium and uranium from other elements by tannin

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Summary

Titanium and uranium have been precipitated by tannin in the presence of various other ions, e.g., Fe3+, Al3+, Cr3+, Th4+, Zr4+, Bi3+, Pb2+, (VO)2+ and rare earths, which are kept in solution by EDTA. The precipitation was carried out by raising the pH of the acidic solution containing EDTA and tannin by dilute ammonium hydroxide or hexamine. The pH of complete precipitation of titanium is 4.0 and above and that of uranium is 6.0 and above.

Zusammenfassung

Titan und Uran werden mit Tannin in Gegenwart verschiedener Fremdionen, die durch ÄDTA in Lösung gehalten werden, gefällt (z.B. in Gegenwart von Fe3+, Al3+, Cr3+, Th4+, Zr4+, Bi3+, Pb2+, (VO)2+, Seltenen Erden). Die Fällung wird durchgeführt, indem man die saure Lösung, die ÄDTA und Tannin enthält, mit Ammoniak oder Hexamethylentetramin neutralisiert. Titan wird bei pH-Werten über 4,0 und Uran bei solchen über 6,0 vollständig ausgefällt.

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Authors and Affiliations

  1. Chemistry Department, St. Paul's C. M. College, Calcutta, 9, India

    J. Das & S. Banerjee

  2. Chemistry Department, City College, Calcutta, 9, India

    J. Das & S. Banerjee

Authors
  1. J. Das
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  2. S. Banerjee
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Das, J., Banerjee, S. Separation of titanium and uranium from other elements by tannin. Z. Anal. Chem. 183, 42–46 (1961). https://doi.org/10.1007/BF00478270

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  • DOI: https://doi.org/10.1007/BF00478270

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