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Extraction and Separation of Zirconium Using 1-Octanol

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Abstract

A selective extraction and separation of zirconium by solvent extraction with 1-octanol is proposed. The process is based on the dissolution of the metal basic carbonates in hydrochloric acid in the presence of potassium fluoride, using 1-octanol as extractant. The effect of several process parameters, including hydrochloric acid and potassium fluoride concentrations, reaction time, and phase ratio between the aqueous and the organic phase was investigated. Zirconium is enriched in the organic phase. The best extraction and separation results were obtained with the basic carbonate dissolved in 10% hydrochloric acid and 1.5 M potassium fluoride. The optimum reaction time was 15 min with an organic to aqueous phase ratio of 2:1. Based on the selectivity of zirconium over hafnium in the organic phase, a McCabe-Thiele diagram was constructed. A near complete stripping of zirconium from the organic phase was achieved using a 3 M sulphuric acid solution. Additional studies are required in order to determine the reaction mechanism and the chemical speciation of the current investigation.

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Funding

This study was financially supported by the University of Pretoria, the South African Research Foundation (NRF) and the DST’s Advanced Metals Initiative.

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  1. Fluoro-Materials Group, Department of Chemical Engineering, University of Pretoria, Lynnwood Road, Pretoria, 0002, South Africa

    M. J. Kabangu, S. J. Lubbe & P. L. Crouse

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  1. M. J. Kabangu
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  2. S. J. Lubbe
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Correspondence to M. J. Kabangu.

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Kabangu, M.J., Lubbe, S.J. & Crouse, P.L. Extraction and Separation of Zirconium Using 1-Octanol. Mining, Metallurgy & Exploration 37, 93–100 (2020). https://doi.org/10.1007/s42461-019-0089-z

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