Journal of Applied Electrochemistry

, Volume 7, Issue 6, pp 495–500 | Cite as

Borate buffer equilibria in nickel refining electrolytes

  • B. V. Tilak
  • A. S. Gendron
  • M. A. Mosoiu
Article

Abstract

Buffer capacity studies, carried out using pH titrations, demonstrated that electrolytes containing NiSO4 + H3BO3 + Na2SO4 buffer more effectively than in the presence of H3BO3 + Na2SO4. The increased buffer capacity is dependent on the concentration of both Ni2+ and H3BO3. Thermodynamic analysis of the pH titration data suggested the formation of a weak complex, Ni(H2BO3)2, (logK ∼ 3.8 to 4.9) between Ni2+ and H3BO3 in mixed chloride-sulphate electrolytes at 55° C.

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References

  1. [1]
    A. L. Zhurin and M. G. Shoikhet,J. Appl. Chem. (U. S. S. R.) 29 (1958) 641.Google Scholar
  2. [2]
    N. Tanaka, Y. Saito and H. Ogino,Bull. Chem. Soc. Japan 36 (1963) 794.Google Scholar
  3. [3]
    J. A. Bolzan, E. A. Jauregui and A. J. Arvia,Electrochim. Acta 8 (1963) 841.Google Scholar
  4. [4]
    H. S. Harned and B. B. Owen, ‘The Physical Chemistry of Electrolyte Solutions’, Reinhold Publishing Corporation, New York (1950).Google Scholar
  5. [5]
    I. M. Kolthoff and W. Bosch,Rec. Trav. chim. 46 (1927) 180.Google Scholar
  6. [6]
    B. B. Owen and E. J. King,J. Amer. Chem. Soc. 65 (1943) 1612.Google Scholar
  7. [7]
    B. V. K. S. R. A. Tilak, S. R. Rajagopalan and A. K. N. Reddy,Trans. Faraday Soc. 58 (1962) 795.Google Scholar
  8. [8]
    D. M. Chizhikov and L. V. Pliginskaya,Soviet Electrochemistry 3 (1961) 69.Google Scholar
  9. [9]
    I. Epelboin, 21st Meeting of the International Committee on Thermodynamics and Electrochemical Kinetics, Prague (1970).Google Scholar

Copyright information

© Chapman and Hall Ltd. 1977

Authors and Affiliations

  • B. V. Tilak
    • 1
  • A. S. Gendron
    • 1
  • M. A. Mosoiu
    • 1
  1. 1.J. Roy Gordon Research LaboratoryINCO, LtdMississaugaCanada

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