Experimental Design in Solvent Extraction: A Study for Divalent Metals Separation in D2EHPA/Isoparaffin System


The solvent extraction process combined with tools of experimental design assists in developing procedures for separation and purification of elements or mineral compounds with high purity. In this work the technique was used to replace the traditional methods for the collection of basic information required for the development of a circuit of solvent extraction. According to the literature, several factors may influence the extraction of divalent metals by D2EHPA in sulfate media, among which the concentration of metals in solution. The objective was to study the variables affecting the separation process Mn/Ni/Co/Cu, such as the aqueous/organic (A/O), contact time, concentrations of the divalent metals in sulfuric medium, pH and solvent concentration. An investigation into the variables that control the process was done using a “cube + star” experimental design, with central point. The results demonstrate it is possible to obtain of a satisfactory mathematical model that describes the process.

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C. Junior, M. Nascimento, L. Yokoyama and O. Cunha, "Experimental Design in Solvent Extraction: A Study for Divalent Metals Separation in D2EHPA/Isoparaffin System," Engineering, Vol. 4 No. 11, 2012, pp. 816-825. doi: 10.4236/eng.2012.411104.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] G. Owusu, “Selective Extractions of Zn and Cd from Zn-Cd-Co-Ni Sulfate Solution Using Di-2-ethylhexyl Phosphoric Acid Extractant,” Hydrometallurgy, Vol. 47, No. 2, 1998, pp. 205-215. doi:10.1016/S0304-386X(97)00044-3
[2] P. E. Tsakiridis and S. L. Agatzini, “Simultaneous Solvent Extraction of Cobalt and Nickel in the Presence of Manganese and Magnesium from Sulfate Solutions by Cyanex 301,” Hydrometallurgy, Vol. 72, No. 3, 2004, pp. 269-278. doi:10.1016/S0304-386X(03)00180-4
[3] M. G. Ritcey and A. W. Ashbrook, “Solvent Extraction, Principles and Applications to Process Metallurgy,” Elsevier Scientific Publishing Company, Amsterdam, 1979.
[4] K. C. Nathsarma and N. Devi, “Separation of Zn(II) and Mn(II) from Sulphate Solutions Using Sodium Salts of D2EHPA, PC 88A and Cyanex 272,” Hydrometallurgy, Vol. 84, No. 3, 2006, pp. 149-154. doi:10.1016/j.hydromet.2006.05.004
[5] R. K. Biswas and D. A. Begum, “Kinetics of Extraction and Stripping of Ti(IV) in HCl-D2EHPA-Kerosene System Using the Single Drop Technique,” Hydrometallurgy, Vol. 55, No. 1, 2000, pp. 57-77. doi:10.1016/S0304-386X(99)00074-2
[6] R. K. Biswas, M. A. Habib and M. F. Bari, “Kinetics of Backward Extraction of Mn(II) from Mn-D2EHPA Complex in Kerosene to Hydrochloric Acid Médium Using Single Drop Technique,” Hydrometallurgy, Vol. 46, No. 3, 1997, pp. 349-362. doi:10.1016/S0304-386X(97)00030-3
[7] R. K. Biswas, M. A. Habib and M. G. K. Mondal, “Kinetics and Mechanism of Stripping of Mn(II)-D2EHPA Complex by Sulphuric Acid Solution,” Hydrometallurgy, Vol. 80, No. 3, 2005, pp. 186-195. doi:10.1016/j.hydromet.2005.06.013
[8] B. Swain, J. Jeong, J. Lee and G. H. Lee, “Separation of Cobalt and Lithium from Mixed Sulphate Solution Using Na-CYANEX 272,” Hydrometallurgy, Vol. 84, No. 3, 2006, pp. 130-138. doi:10.1016/j.hydromet.2006.03.061
[9] X. Fu and J. A. Golding, “Solvent Extraction of Cobalt and Nickel in Bis(2,4,4-tri-methylpentyl) Phosphinic Acid, ‘CYANEX 272’,” Solvent Extraction and Ion Exchange, Vol. 5, No. 2, 1987, pp. 205-226. doi:10.1080/07366298708918562
[10] D. Georgiou and V. G. Papangelakis, “Behaviour of Cobalt during Sulphuric Acid Pressure Leaching of a Limonitic Laterite,” Hydrometallurgy, Vol. 100, No. 1, 2009, pp. 35-40. doi:10.1016/j.hydromet.2009.09.011
[11] R. G. McDonald and B. I. Whittington, “Atmospheric Acid Leaching of Nickel Laterites Review Part I. Sulphuric Acid Technologies,” Hydrometallurgy, Vol. 91, No. 1, 2008, pp. 35-55. doi:10.1016/j.hydromet.2007.11.009
[12] M. Niinae, N. Komatsu, Y. Nakahiro, T. Wakamatsua and J. Shibatab, “Preferential Leaching of Cobalt, Nickel and Copper from Cobalt-Rich Ferromanganese Crusts with Ammoniacal Solutions Using Ammonium Thiosulfate and Ammonium Sulfite as Reducing Agents,” Hydrometallurgy, Vol. 40, No. 1, 1996, pp. 111-121. doi:10.1016/0304-386X(94)00085-H
[13] Y.-F. Shen, W.-Y. Xue, W. Li, S.-D. Li and X.-H. Liu, “Recovery of Mn2+, Co2+ and Ni2+ from Manganese Nodules by Redox Leanching and Solvent Extraction,” Transactions of Nonferrous Metals Society of China, Vol. 17, No. 4, 2007, pp. 1105-1111. doi:10.1016/S1003-6326(07)60233-7
[14] M. S. Bafghi, A. Zakeri, Z. Ghasemi and M. Adeli, “Reductive Dissolution of Manganese Ore in Sulfuric Acid in the Presence of Iron Metal,” Hydrometallurgy, Vol. 90, No. 2, 2008, pp. 207-212. doi:10.1016/j.hydromet.2007.07.003
[15] J. M. M. Paix?o, J. C. Amaral, L. E. Memória and L. R. Freitas, “Sulphation of Carajás Manganese Ore,” Hydrometallurgy, Vol. 39, No. 1, 1995, pp. 215-222. doi:10.1016/0304-386X(95)00031-B
[16] C. A. Carvalhido, M. F. Pedrosa and A. H. Martins, “Extra??o por Solventes Aplicada à Remo??o de Metais Pesados Presentes no Licor de Lixivia??o do Minério de Manganês da Mina do Azul (PA),” Revista Escola de Minas, Vol. 54, No. 3, 2001, pp. 227-231. doi:10.1590/S0370-44672001000300011
[17] Y. Shen, W. Xue, W. Li, S. Li and X. Liu, “Recovery of Mn2+, Co2+ and Ni2+ from Manganese Nodules by Redox Leaching and Solvent Extraction,” Transactions of Nonferrous Metals Society of China, Vol. 17, No. 4, 2007, pp. 1105-1111. doi:10.1016/S1003-6326(07)60233-7
[18] F Pagnanelli, M. Garavini, F. Vegliò and L. Toro, “Preliminary Screening of Purification Processes of Liquor Leach Solutions Obtained from Reductive Leaching of Low-Grade Manganese Ores,” Hydrometallurgy, Vol. 71, No. 3, 2004, pp. 319-327. doi:10.1016/S0304-386X(02)00156-1
[19] H. Vu, J. Jandová, K. Lisá and F. Vranka, “Leaching of Manganese Deep Ocean Nodules in FeSO4-H2SO4-H2O Solutions,” Hydrometallurgy, Vol. 77, No. 1, 2005, pp. 147-153. doi:10.1016/j.hydromet.2004.09.012
[20] P. C. Resende, F. S. Barrado and A. H. Martins, “Sulfuric Activation of a Brazilian Manganese Ore for Heavy Metals Removal,” Hydrometallurgy, Vol. 51, No. 3, 1999, pp. 325-333. doi:10.1016/S0304-386X(98)00087-5
[21] G. E. P. Box and K. B. Wilson, “On the Experimental Attainment of Optimum Conditions,” Journal of the Royal Statistical Society, Vol. 13, No. 1, 1951, pp. 1-45.
[22] D. C. Montgomery, “Design and Analysis of Experiments,” John Wiley and Sons, Inc, New York, 1997.

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