Abstract
The solvent extraction behavior of cobalt and lithium from mixed sulfate solution using di(2-ethylhexyl)phosphoric acid (D2EHPA)/kerosene as extractant system has been investigated. The effect of different process parameters such as pH of feed solution, extractant concentration, cobalt and lithium ion concentrations in the feed solution have been studied. Extraction equilibrium constants have been calculated and found to be log Kex Co = –2.01 and log Kex Li = –2.42. The highest separation factor of 292 was achieved using 1.59 M D2EHPA at pH 1.85 from mixed sulfate solution. 93.9% of cobalt and 11.4% lithium was co-extracted from 0.01 M cobalt and lithium sulfate solution. Extraction of cobalt-lithium by D2EHPA is affected by cation exchange mechanism, cobalt is extracted as [Co(HA2)2] and [CoA2] depending on the metal concentration in the feed solution while the lithium is extracted as [Li(A2H)]. Quantitative extraction of cobalt was achieved in two-stage counter-current batch extraction (with McCabe–Thiele plot) using 0.477 M D2EHPA at an O : A phase ratio of 1. The data obtained from loaded organic and raffinate indicate a composition which reveals nearly complete extraction of cobalt and rejection of lithium resulting significant separation of these elements from mixed sulfate solution.
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REFERENCES
C. K. Lee and K. I. Rhee, Hydrometallurgy 68, 537 (2003).
S. M. Shin, N. H. Kim, J. S. Sohn, D. H. Yang, and Y. H. Kim, Hydrometallurgy 79, 172 (2005).
M. Contestabile, S. Panero, and B. Scrosati, J. Power Sources 92, 65 (2001).
P. Zhang, T. Yokoyama, O. Itabashi, T. M. Suzuki, and K. Inoue, Hydrometallurgy 47, 259 (1998).
C. K. Lee and K. I. Rhee, J. Power Sources 109, 17 (2002).
D. S. Kim, J. S. Sohn, C. K. Lee, K. I, K. S. Han, and Y. I. Lee, J. Power Sources 132, 145 (2004).
J. M. Nan, D. M. Han, M. J. Yang, M. Cu, and X. L. Hou, Hydrometallurgy 47, 75 (2006).
B. Swain, J. Foeng, J. C. Lee, and G. H. Lee, Hydrometallurgy 84, 130 (2006).
B. Swain, J. Jeong, J. C. Lee, G. H. Lee, and J.-S. Sohna, J. Power Sources 167, 536 (2007)
Y. Pranolo and C. Y. Cheng, CSIRO Minerals Report No. DMR 2598 (2005), p. 1.
B. Swain, J. Jeong, J.-C. Lee, and G. H. Lee, Sep. Purif. Technol. 63, 360 (2008).
B. Swain, J. Jeong, K. Yoo, and J. C. Lee, Hydrometallurgy 101, 20 (2010)
Y. Pranolo, W. Zhang, and C. Y. Cheng, Hydrometallurgy 102, 37 (2010)
J. Xu, H. R. Thomas, R. W. Francis, K. R. Lum, and J. W. B. Liang, J. Power Sources 177, 512 (2008).
H. Svedsen, G. Schei, and M. Osman, Hydrometallurgy 25, 197 (1990).
G. L. Tulasi and S. Kumar, AIChE J. 45, 2534 (1999).
T. Hano, M. Matsumoto, T. Ohtake, N. Egashira, and F. Hori, Solvent Extract. Ion Exchange 10, 195 (1992).
P. Zhang, T. Y. Osamu, I. Tshishige, M. Suzuki, and K. Inoue, Hydrometallurgy 47, 259 (1998).
G. M. Ritcey and A. W. Ashbrook, Solvent Extraction, Principles and Applications to Process Metallurgy, Part 1 (Elsevier, Amsterdam, 1984).
M. L. Brisk and W. J. McManamey, J. Appl. Chem. 19, 103 (1969).
R. S. Juang and J. Y. Su, Ind. Eng. Chem. Res. 31, 239 (1992).
W. P. C. Duyvesteyn, D. A. Neudorf, and E. M. Weenink, US Patent No. 6350420B1 (2002).
P. Zhang, T. Yokoyama, T. M. Suzuki, and K. Inoue, Hydrometallurgy 61, 223 (2001).
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Yamina Boukraa Extraction of Cobalt and Lithium from Sulfate Solution Using Di(2-ethylhexyl)phosphoric Acid/Kerosene Mixed Extractant. Russ. J. Phys. Chem. 94, 1136–1142 (2020). https://doi.org/10.1134/S0036024420060321
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DOI: https://doi.org/10.1134/S0036024420060321