Extraction of lithium from salt lake brine with triisobutyl phosphate in ionic liquid and kerosene

Abstract

Three ionic liquids(ILs), namely, 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide and 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl] imide with the triisobutyl phosphate(TIBP) and kerosene system were respectively used to extract lithium ion from salt lake brine with a high concentration ratio of magnesium and lithium experimentally. Results indicate that the highest extraction selectivity for lithium was obtained with IL 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)-sulfonyl]imide. The effects of solution pH and phase ratio R(O/A) on the extractive step and the influence of acid concentration of the stripping solution and R(O/A) on the back extraction step were also investigated systematically. The single-step extraction efficiency of lithium ion was 83.71% under the optimal extraction conditions, and the single-step back extraction efficiency was 85.61% with a 1.0 mol/L HCl in 1.0 mol/L NaCl medium as stripping agent at R(O/A)=2. The liquid-liquid extraction mechanism and the complex of the ligand with lithium were proposed.

Keywords

Ionic liquid / Triisobutyl phosphate / Extraction / Lithium / Salt lake brine

References

[1] Li H. Y., Zhai X. J., Fu Y. J. Mol. Sci, 2002, 18(4): 199.

[2] Zhao Z. W., Si X. F., Liu X. H., He L. H., Liang X. X. Hydrometallurgy, 2013, 133: 75.

[3] Zhou Z. Y., Qin W., Fei W. Y. J. Chem. Eng. Data, 2011, 56(56): 3518.

[4] Ono M., Bell M. G., Hirooka Y., Kaita R., Kugel H. W., Mazzitelli G., Menard J. E., Mirnov S. V., Shimada M., Skinner C. H., Tabares F. L. Nucl. Fusion, 2012, 52: 1.

[5] Pannocchia G., Puccini M., Seggiani M., Vitolo S. Ind. Eng. Chem. Res, 2007, 46: 6696.

[6] Bettge M., Seung Y. R., Maclaren S., Burdin S., Petrov L., Yu M. F., Sammann E., Abraham D. P. J. Power Sources, 2012, 206: 288.

[7] Rahman M. M., Wang J. Z., Zeng R., Wexler D., Liu H. K. J. Power Sources, 2012, 206: 259.

[8] Meng L. Z., Yu X. P., Li D., Deng T. L. J. Chem. Eng. Data, 2011, 56(56): 4627.

[9] Zhu S. L., Piao X. L., Gou Z. M. J. Tsinghua Univ.(Sci. & Tech.), 2000, 40: 47.

[10] Song X. J., Wang S. F., Li Z. J. Chin. J. Rare Metals, 2011, 35(35): 434.

[11] Yang L. X., Wu S. X., Liu X. L., He J., Chen W. G. Chem. J. Chinese Universities, 2013, 34(34): 55.

[12] Nagaphani K. B., Chong H. S., Man S. L. Hydrometallurgy, 2014, 144–145: 1.

[13] Zhou Z. Y., Liang S. K., Qin W., Fei W. Y. Ind. Eng. Chem. Res, 2013, 52: 7912.

[14] Feng X. D., Liang F. H., Su R., Wu L. J., Li X. Y., Wang X. H., Zhang H. Q., Yu A. M. Chem. Res. Chinese Universities, 2013, 29(29): 647.

[15] Yan R., Shao M. Y., Liang Z. F., Zhang H. Q., Yu A. M. Chem. Res. Chinese Universities, 2013, 29(29): 218.

[16] Visser A. E., Swatloski R. P., Reichert W. M., Mayton R., Sheff S., Wierzbicki A., Davis Jr. J. H., Rogers R. D., Chem. Commun., 2001, (1), 135.

[17] Tonova K. Sep. Purif. Technol, 2012, 89: 57.

[18] Garcia S., Larriba M., Garcia J., Torrecilla J. S., Rodriguez F. J. Chem. Thermodynamics, 2012, 53: 119.

[19] Tang B. K., Bi W. T., Tian M. L., Row K. H. J. Chromatogr. B, 2012, 904: 1.

[20] Lee J. M. Fluid Phase Equilibr, 2012, 319: 30.

[21] Papaiconomou N., Yakelis N., Salminen J., Bergman R., Prausnitz J. M. J. Chem. Eng. Data, 2007, 52(52): 39.

[22] Lee J. M., Prausnitz J. M. Chem. Phys. Lett, 2010, 492(1-3): 55.

[23] Dai S., Ju Y. H., Barnes C. E. J. Chem. Soc. Dalton Trans, 1999, 8: 1201.

[24] Chun S., Sergei V. D., Richard A. B. Anal. Chem, 2001, 73(73): 3737.