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Solvent extraction of niobium from alkali solution by methyltrioctylammonium chloride

  • Metallurgical Separation Science And Engineering
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Abstract

For the purpose of developing an alkali leaching-solvent extraction directly from alkali solution process, the extraction of niobium from alkali solution by long-chain alkyl quternary ammonium salt (methyltrioctylammonium chloride R4NCl) in toluene was investigated. The experiments were carried out under conditions of 25 °C, Nb(V) concentration 0.01 mol/L, pH 10.7–13.8, R4NCI concentration 0.02–0.14 mol/L. It has been found that the distribution ratio of niobium increases with increasing R4NCl concentration and with decreasing KCl concentration, but it shows maximum value at pH value of about 12 and decreases below or above this pH value. Distribution ratio of niobium goes up to over 1 000 in appropriate conditions, and so it has been proved that R4NCl is an effective extractant for extraction of niobium from alkali solution.

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Authors and Affiliations

  1. Metallurgical Separation Science and Engineering Lab., Central South University, 410083, Changsha, China

    Zhou Kang-gen

  2. Tohoku University, 980-77, Sendai, Japan

    Tokuda Masanori

Authors
  1. Zhou Kang-gen
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  2. Tokuda Masanori
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Additional information

Foundation item: The Key Project of Science and Technology Agency of Japan, 1994

Biography of the first author: ZHOU Kang-gen, doctor of engineering, professor, born in 1963, majoring in extractive metallurgy of rare metals and application of membrane separation technology.

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Zhou, Kg., Tokuda, M. Solvent extraction of niobium from alkali solution by methyltrioctylammonium chloride. J Cent. South Univ. Technol. 7, 175–177 (2000). https://doi.org/10.1007/s11771-000-0047-3

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  • DOI: https://doi.org/10.1007/s11771-000-0047-3

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