Separation of Manganese and Cadmium from Cobalt Electrolyte Solution by Solvent Extraction
Impurity metals such as manganese and cadmium
from high-tenor cobalt electrolyte solution were selectively removed
by solvent extraction method using Co-D2EHPA after converting the functional group of D2EHPA with Co2+ ions. The process parameters
such as pH, organic concentration, O/A ratio, kinetics etc. were
investigated and the experiments were conducted by batch tests in the laboratory bench scale. Results showed that a significant amount
of manganese and cadmium can be extracted using Co-D2EHPA for the optimum processing of cobalt electrolyte solution at equilibrium pH about 3.5. The McCabe-Thiele diagram, constructed from the
extraction studies showed that 100% impurities can be extracted through four stages for manganese and three stages for cadmium
using O/A ratio of 0.65 and 1.0, respectively. From the stripping study, it was found that 100% manganese and cadmium can be stripped from the loaded organic using 0.4 M H2SO4 in a single
contact. The loading capacity of Co-D2EHPA by manganese and cadmium were also investigated with different O/A ratio as well as
with number of stages of contact of aqueous and organic phases. Valuable information was obtained for the designing of an impurities
removal process for the production of pure cobalt with less trouble in the electrowinning circuit.
[1] C. Y. Cheng, C. A. Hughes, K. R. Barnard, and K. Larcombe, "Manganese in Copper Solvent Extraction and Electrowinning,"
Hydrometallurgy, vol. 58, pp. 135-150, 2000.
[2] W. Zhang, and C. Y. Cheng, "Manganese Metallurgy Review. Part II:
Manganese Separation and Recovery from Solution," Hydrometallurgy,
vol. 89(3-4), pp. 160-177, 2007.
[3] K. G. Mishra, P. Singh, and D. M. Muir, "Electrowinning of Cobalt
from Sulphate Solutions Contaminated with Organic Impurities, "Hydrometallurgy, vol. 65(2-3), pp. 97-102, 2002.
[4] N. B. Devi, K. C. Nathsarma, and V. Chakravortty, "Separation of
Divalent Manganese and Cobalt Ions from Sulfate Solutions using
Sodium Salts of D2EHPA, PC 88A and Cyanex 272," Hydrometallurgy,
vol. 54, pp. 117-131, 2000.
[5] L. F. Cook and W. W. Szmokaluk. "Refinery of Cobalt and Nickel
Sulphate Solution by Solvent Extraction using D2EHPA," in Proc. Int.
Solv. Ext. Conf. ISEC ÔÇÿ71, Soc. Chem. Ind., London, 1971, pp. 451-462.
[6] P. M. Cole, "The Introduction of Solvent Extraction Steps During
Upgrading of a Cobalt Refinery," Hydrometallurgy, vol. 64, pp. 69-77, 2002.
[7] D. Senapati, G. R. Chaudhury, and P. V. R. B. Sarma, "Purification of
Nickel Sulphate Solutions Containing Iron, Copper, Cobalt, Zinc and Manganese," Journal of Chemical Technology and Biotechnology, vol.
59(4), pp. 335-339, 1994.
[8] I. Ortiz, and M. F. San Román, "Analysis of the Back-extraction of
Cadmium-nickel-D2EHPA Organic Phases," Separation Science and Technology, vol. 37(3), pp. 607-625, 2002.
[9] B. R. Reddy, D. N. Priya, and J. R. Kumar, "Solvent Extraction of Cadmium (II) from Sulphate Solution using TOPS 99, PC 88A, Cyanex
272 and their Mixtures," Hydrometallurgy, vol. 74(3-4), pp. 277-283,2004.
[10] V. Kumar, M. Kumar, M. K. Jha, J. Jeong, and J.-C Lee, "Solvent Extraction of Cadmium from Sulfate Solution with Di-(2-ethylhexyl)
Phosphoric Acid Diluted in Kerosene," Hydrometallurgy, vol. 96(3), pp. 230-234, 2009.
[11] A. M. Sastre, and M. Muhammed, "The Extraction of Zinc (II) from Sulphate and Perchlorate Solutions by Di(2-ethylhexyl)phosphoric Acid
Dissolved in Isopar-H," Hydrometallurgy, vol. 12, pp. 177-193, 1984.
[1] C. Y. Cheng, C. A. Hughes, K. R. Barnard, and K. Larcombe, "Manganese in Copper Solvent Extraction and Electrowinning,"
Hydrometallurgy, vol. 58, pp. 135-150, 2000.
[2] W. Zhang, and C. Y. Cheng, "Manganese Metallurgy Review. Part II:
Manganese Separation and Recovery from Solution," Hydrometallurgy,
vol. 89(3-4), pp. 160-177, 2007.
[3] K. G. Mishra, P. Singh, and D. M. Muir, "Electrowinning of Cobalt
from Sulphate Solutions Contaminated with Organic Impurities, "Hydrometallurgy, vol. 65(2-3), pp. 97-102, 2002.
[4] N. B. Devi, K. C. Nathsarma, and V. Chakravortty, "Separation of
Divalent Manganese and Cobalt Ions from Sulfate Solutions using
Sodium Salts of D2EHPA, PC 88A and Cyanex 272," Hydrometallurgy,
vol. 54, pp. 117-131, 2000.
[5] L. F. Cook and W. W. Szmokaluk. "Refinery of Cobalt and Nickel
Sulphate Solution by Solvent Extraction using D2EHPA," in Proc. Int.
Solv. Ext. Conf. ISEC ÔÇÿ71, Soc. Chem. Ind., London, 1971, pp. 451-462.
[6] P. M. Cole, "The Introduction of Solvent Extraction Steps During
Upgrading of a Cobalt Refinery," Hydrometallurgy, vol. 64, pp. 69-77, 2002.
[7] D. Senapati, G. R. Chaudhury, and P. V. R. B. Sarma, "Purification of
Nickel Sulphate Solutions Containing Iron, Copper, Cobalt, Zinc and Manganese," Journal of Chemical Technology and Biotechnology, vol.
59(4), pp. 335-339, 1994.
[8] I. Ortiz, and M. F. San Román, "Analysis of the Back-extraction of
Cadmium-nickel-D2EHPA Organic Phases," Separation Science and Technology, vol. 37(3), pp. 607-625, 2002.
[9] B. R. Reddy, D. N. Priya, and J. R. Kumar, "Solvent Extraction of Cadmium (II) from Sulphate Solution using TOPS 99, PC 88A, Cyanex
272 and their Mixtures," Hydrometallurgy, vol. 74(3-4), pp. 277-283,2004.
[10] V. Kumar, M. Kumar, M. K. Jha, J. Jeong, and J.-C Lee, "Solvent Extraction of Cadmium from Sulfate Solution with Di-(2-ethylhexyl)
Phosphoric Acid Diluted in Kerosene," Hydrometallurgy, vol. 96(3), pp. 230-234, 2009.
[11] A. M. Sastre, and M. Muhammed, "The Extraction of Zinc (II) from Sulphate and Perchlorate Solutions by Di(2-ethylhexyl)phosphoric Acid
Dissolved in Isopar-H," Hydrometallurgy, vol. 12, pp. 177-193, 1984.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:63926", author = "Shafiq Alam and Mirza Hossain and Hesam Hassan Nejad", title = "Separation of Manganese and Cadmium from Cobalt Electrolyte Solution by Solvent Extraction", abstract = "Impurity metals such as manganese and cadmium
from high-tenor cobalt electrolyte solution were selectively removed
by solvent extraction method using Co-D2EHPA after converting the functional group of D2EHPA with Co2+ ions. The process parameters
such as pH, organic concentration, O/A ratio, kinetics etc. were
investigated and the experiments were conducted by batch tests in the laboratory bench scale. Results showed that a significant amount
of manganese and cadmium can be extracted using Co-D2EHPA for the optimum processing of cobalt electrolyte solution at equilibrium pH about 3.5. The McCabe-Thiele diagram, constructed from the
extraction studies showed that 100% impurities can be extracted through four stages for manganese and three stages for cadmium
using O/A ratio of 0.65 and 1.0, respectively. From the stripping study, it was found that 100% manganese and cadmium can be stripped from the loaded organic using 0.4 M H2SO4 in a single
contact. The loading capacity of Co-D2EHPA by manganese and cadmium were also investigated with different O/A ratio as well as
with number of stages of contact of aqueous and organic phases. Valuable information was obtained for the designing of an impurities
removal process for the production of pure cobalt with less trouble in the electrowinning circuit.", keywords = "Manganese, Cadmium, Cobalt, D2EHPA, Solvent extraction.", volume = "6", number = "11", pages = "1092-5", }