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Solvent extraction and stripping of lithium ion from aqueous solution and its application to seawater

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Abstract

For the development of lithium ion recovery process from seawater, a series of experimental researches were performed. Solvent extraction of lithium ion from aqueous solution using kerosene as solvent was proposed. Lithium ion is effectively extracted by thenoyltrifluoroacetone–trioctylphosphine oxide (TTA–TOPO) in kerosene within 80 min. Extraction efficiency is severely influenced by stoichiometric parameters. Among the stoichiometric parameters, volume ratio of aqueous (A) to extraction (E) solution is the most influential parameter. After extraction, lithium ion could be easily stripped from the extraction solution by acidic solutions. Stripping efficiency decreases with pH of acidic solutions, and the kind of acid does not affect the stripping efficiency. Extraction efficiency maintains at more than 93 % even when the extraction solution is recycled three times. 65 % of lithium ion can be extracted from seawater by this solvent extraction process when magnesium ion is precipitated by NH4OH prior to solvent extraction process. Other metallic ions in seawater decrease the extraction efficiency of lithium ion.

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Acknowledgments

This work was financially supported by the Research Grant of Pukyong National University (2014).

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Authors and Affiliations

  1. Department of Chemical Engineering, Pukyong National University, Busan, 608-739, Republic of Korea

    Gregorius Rionugroho Harvianto, Seok-Hyeon Kim & Chang-Sik Ju

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  1. Gregorius Rionugroho Harvianto
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  2. Seok-Hyeon Kim
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  3. Chang-Sik Ju
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Correspondence to Chang-Sik Ju.

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Harvianto, G.R., Kim, SH. & Ju, CS. Solvent extraction and stripping of lithium ion from aqueous solution and its application to seawater. Rare Met. 35, 948–953 (2016). https://doi.org/10.1007/s12598-015-0453-1

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  • DOI: https://doi.org/10.1007/s12598-015-0453-1

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