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Mixed solvent systems for the extraction and stripping of iron(III) from concentrated acid chloride solutions

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Abstract

The extraction of concentrated iron(III) from acid chloride solutions has been investigated with methyl isobutyl ketone (MIBK), tri-n-butyl phosphate (TBP), di(2-ethylhexyl) phosphoric acid (D2EHPA), and their mixtures in various proportions, at different acid concentrations. On comparing the extraction of iron(III) with mixed and individual extractant, it was found that both D2EHPA-MIBK and D2EHPA-TBP mixtures exhibit synergism, the latter having better extraction ability. The synergistic coefficients, at different initial acid concentrations for each mixed extractant system, were evaluated and compared. An increase in the concentration of MIBK and TBP in the mixed organic resulted in higher synergistic coefficient. The stripping of iron(III) from loaded D2EHPA was found to increase with the strip feed acid concentration, while from loaded organic mixtures, it initially increased and then decreased. Stripping of iron(III) from D2EHPA-MIBK loaded solvent is better then D2EHPA-TBP. The extracted iron species formed and the stripping reactions have been proposed. Ultraviolet visible spectra of the stripped organic phase support the result and the proposed mechanisms.

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Authors and Affiliations

  1. the Non-Ferrous Process Division, National Metallurgical Laboratory, 831 007, Jamshedpur, India

    K. K. Sahu (Scientist)

  2. the Hydro and Electrometallurgy Division, Regional Research Laboratory, 751 013, Bhubaneswar, India

    R. P. Das (Acting Director, Senior Deputy Director and Head)

Authors
  1. K. K. Sahu
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  2. R. P. Das
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Sahu, K.K., Das, R.P. Mixed solvent systems for the extraction and stripping of iron(III) from concentrated acid chloride solutions. Metall Mater Trans B 31, 1169–1174 (2000). https://doi.org/10.1007/s11663-000-0003-5

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  • DOI: https://doi.org/10.1007/s11663-000-0003-5

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