Research ArticleOpen AccessGoogle Scholar indexed
Comparative Study between D2EHPA and Cyanex 272 as Extractants of Mn(II) from a Leached Liquor Produced by Reductive Leaching of a Pyrolusite Ore with SO<sub>2</sub>
Centro de Investigación y de Estudios Avanzados del IPN, Carretera Saltillo-Monterrey, km 13.5, Ramos Arizpe, Coah., México
Centro de Investigación y de Estudios Avanzados del IPN, Carretera Saltillo-Monterrey, km 13.5, Ramos Arizpe, Coah., México
Centro de Investigación y de Estudios Avanzados del IPN, Carretera Saltillo-Monterrey, km 13.5, Ramos Arizpe, Coah., México
Centro de Investigación y de Estudios Avanzados del IPN, Carretera Saltillo-Monterrey, km 13.5, Ramos Arizpe, Coah., México
- 1 Centro de Investigación y de Estudios Avanzados del IPN, Carretera Saltillo-Monterrey, km 13.5, Ramos Arizpe, Coah., México
- 2 Centro de Investigación y de Estudios Avanzados del IPN, Carretera Saltillo-Monterrey, km 13.5, Ramos Arizpe, Coah., México
- 3 Centro de Investigación y de Estudios Avanzados del IPN, Carretera Saltillo-Monterrey, km 13.5, Ramos Arizpe, Coah., México
- 4 Centro de Investigación y de Estudios Avanzados del IPN, Carretera Saltillo-Monterrey, km 13.5, Ramos Arizpe, Coah., México
Copy link · social · email
Abstract
This paper compares the efficiency of D2EHPA and Cyanex 272 to extract the divalent manganese cation from an actual leaching solution obtained by reductive leaching of a low-grade pyrolusite ore, using SO2 gas. The studied variables were the extractant concentration in the organic phase, the pH of the leached liquor and the volume ratio between organic phase and leached liquor. It was observed that D2EHPA is a better extractant than Cyanex272. Therefore, with the best experimental conditions found, both extractants reach a manganese recovery around 95% with five extraction stages conducted under the following conditions: 25?C, O/A = 2, 10% volume of extractant concentration in the organic phase, pH of the leached liquor before the mixing between 8 and 8.5, and one minute of mixing time for each extraction stage.
KeywordsManganese Solvent ExtractionManganese LeachingManganesePyrolusite
- J. B. Calvert, “Chromium and Manganese,” 2005. http://www.du.edu/~jcalvert/phys/chromang.htm.
- W. Zhang, C. Y. Cheng and Y. Pranolo, “Investigation of Methods for Removal and Recovery of Manganese in Hydrometallurgical Processes,” Hydrometallurgy, Vol. 101, No. 1-2, 2010, pp. 58-63. doi:10.1016/j.hydromet.2009.11.018
- W. Zhang, P. Singh and D. Muir, “Oxidative Precipitation of Manganese with SO2/O2 and Separation from Cobalt and Nickel,” Hydrometallurgy, Vol. 63, No. 2, 2002, pp. 127-135. doi:10.1016/S0304-386X(01)00205-5
- N. Mulaudzi and T. Mahlangu, “Oxidative Precipitation of Mn(II) from Cobalt Leach Solutions Using Dilute SO2/Air Gas Mixture,” The Journal of Southern African Institute of Mining and Metallurgy, Vol. 109, 2009, pp. 375-381.
- J. Van Rooyen, S. Archer and M. Fox, “Manganese Removal from Cobalt Solutions with Dilute Sulphur Dioxide Gas Mixtures,” The Fourth Southern African Conference on Base Metals. The Southern Africa Institute of Mining and Metallurgy, Swakopmund, 23-25 July 2007, pp. 365376.
- M. Mouton, J. Van Deventer and J. Vaarno, “Oxidative Precipitation of Fe and Mn by Air/SO2,” The Fourth Southern African Conference on Base Metals. The Southern Africa Institute of Mining and Metallurgy, Swakopmund, 23-25 July 2007, pp 179-191.
- V. Menard and G. Demopuolos, “Gas Transfer Kinetics and Redox Potential Considerations in Oxidative Precipitation of Manganese from an Industrial Zinc Sulphate Solution with SO2/O2,” Hydrometallurgy, Vol. 89, No. 3-4, 2007, pp. 357-368. doi:10.1016/j.hydromet.2007.03.014
- H. Yoshida, H. Nagai and H. Onishi, “Solvent Extraction of Manganese with Thenoyltriflurocetone,” Talanta, Vol. 13, No. 1, 1966, pp. 37-42. doi:10.1016/0039-9140(66)80123-6
- Y. C. Hoh, W. S. Chuang, B. D. Lee, C. C. Chang, “The Separation of Manganese from Cobalt by D2EHPA,” Hydrometallurgy, Vol. 12, No. 3, 1984, pp. 375-386. doi:10.1016/0304-386X(84)90008-2
- T. Sato and T. Nakamura, “Solvent Extraction of Divalent Metals from Sulfuric Acid Solutions by Dialkylphosphoric Acid,” Journal of the Mining and Metallurgical Institute of Japan, Vol. 101, No. 1167, 1985, pp. 309-312.
- M. A. Hughes and R. K. Biswas, “The Kinetics of Manganese(II) Extraction in the Acidic Sulfate-D2EHPA-nhexane System Using the Rotating Diffusion Cell Technique,” Hydrometallurgy, Vol. 32, No. 2, 1993, pp. 209221. doi:10.1016/0304-386X(93)90025-9
- C. Y. Cheng, “Purification of Synthetic Laterite Leach Solution by Solvent Extraction Using D2EHPA,” Hydrometallurgy, Vol. 56, No. 3, 2000, pp. 369-386. doi:10.1016/S0304-386X(00)00095-5