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Borate buffer equilibria in nickel refining electrolytes

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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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Author notes

  1. B. V. Tilak

    Present address: Research Center, Hooker Chemicals and Plastics Corporation, 2801 Long Road, 14072, Grand Island, New York, USA

  2. M. A. Mosoiu

    Present address: Process Technology, Copper Cliff Copper Refinery, INCO, Limited, Copper Cliff, Ontario, Canada

Authors and Affiliations

  1. J. Roy Gordon Research Laboratory, INCO, Ltd, Sheridan Park, Mississauga, Ontario, Canada

    B. V. Tilak, A. S. Gendron & M. A. Mosoiu

Authors
  1. B. V. Tilak
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  2. A. S. Gendron
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  3. M. A. Mosoiu
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Tilak, B.V., Gendron, A.S. & Mosoiu, M.A. Borate buffer equilibria in nickel refining electrolytes. J Appl Electrochem 7, 495–500 (1977). https://doi.org/10.1007/BF00616760

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  • DOI: https://doi.org/10.1007/BF00616760

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