IJE TRANSACTIONS B: Applications Vol. 17, No. 2 (July 2004) 191-200   

downloaded Downloaded: 100   viewed Viewed: 2011

S. K. Sadrnezhaad

Department of Materials Science and Engineering
Center of Excellence in Production and Forming Processes of Materials
Sharif University of Technology, P.O. Box 11365-9466, Tehran, Iran
sadrnezh@ sharif.edu

E. Keshavarz Alamdari

Department of Mining and Metallurgical Engineering
Amirkabir University of Technology, Hafez Avenue, Tehran, Iran
( Received: April 10, 2003 – Accepted in Revised Form: May 10, 2004 )

Abstract    Thermodynamics of extraction of Zn2+ from sulfuric acid media contacting to a mixture of DEHPA and MEHPA diluted with 80 wt% aromatic-aliphatic kerosene with a constant DEHPA to MEHPA ratio is investigated at different acidities, concentrations and temperatures. As a result, the extraction reaction is found to be endothermic with a zinc distribution factor that increases with increasing of the temperature, acidity of the solution and the concentration of the extractant. The mechanism of the extraction reaction is shown to be different for pH > 1 with that at pH <1. The pH of the aqueous media has also an important influence on progressing of the extraction reaction.


Keywords    Solvent Extraction, Zinc, DEHPA, MEHPA, Thermodynamics, Extraction Mechanism



1. Thorsen, G., “Commercial Processes for Cadmium and Zinc”, in Handbook of Solvent Extraction, Ed.T. C. Lo, M. H. I. Bdird and C. Hanson, John Wiley and Sons, (1983), 709-716.

2. Gupta, C. K. and Krishnamurthy, N., “Extractive Metallurgy of Rare Earths” International Materials Review, Vol. 37, No. 5, (1992), 197-248.

3. Juneja, J. M., Singh, S. and Bose, D. K., “Investigations on the Extraction of Molybdenum and Rhenium Values from Low Grade Molybdenite Concentrate”, Hydrometallurgy, 41, (1996), 201-209.

4. Keshavarz Alamdari, E. and Sadrnezhaad, S. K., “Thermodynamics of Extraction of Mo042- from Aqueous Sulfuric Acid Media with TBP Dissolved in Kerosene”, Hydrometallurgy, Vol. 55, (2000),327-341.

5. Brodskaya, G. A., Gureev, E. S. and Gapurova, O.U., “Solvent Extraction of Tungsten with Tri-n-Octylamine from Hydrogen Peroxide Solutions”, Radiokhimiya, 6, 30, (1988), 769-774.

6. Sadrnezhaad, S. K. and Keshavarz Alamdari, E., “Thermodynamics of Extraction of ReO4- from Aqueous Sulfuric Acid Media with Tri-n-Butyl Phosphate Dissolved in Kerosene”, Metallurgical and Materials Transactions B, Vol. 32B, No. 1, (February 2001), 5-10.

7. Xuekang, H., “Achievements in Technical Improvements on Comprehensive Recovery of Uranium, Molybdenum and Rhenium in Xifeng Uranium Mill”, International Atomic Energy Agency, Vienna, Austria, Proceedings of the International Conference on Uranium Extraction,(1996), 114-125.

8. Abisheva, Z. S , Bodnar, N. M., Bukurov, T. N., Buslaeva, T. M., Blaida, I. A., “Osmium Behavior in Rhenium Extraction from Sulfuric Acid Solutions”, TSVETN. MET., 9, (Sep. 1994), 33-35.

9. Skorovarov, D. I., Nesterov, Yu. V., Nikonov, V. I., Fomenkov, V. G., Akimova, I. D., Kulish, T. V. and Mironov, A. V., “Extraction Concentration of Scandium and Rhenium from Complex Salt Solutions Containing Low Levels of Valuable Components”, Proceedings of Session N. Chemical Mining and Processing Methods, (1990), 231-237.

10. Jaaskelainen, E. and Paatero E. “Properties of the Ammonium from Versatic 10 in a Liquid-Liquid Extraction System.” Hydrometallurgy, 51, (1999), 47-71.

11. Zagorodnayaya, A. N., Ponomareva, E. I. and Abisheva, Z. S., “Extraction Technology for Rhenium Recovery from Chloride-Sulfate Zinc-Cadmium Solution: Solvent Extraction in Process Industries”, Edited by: Logsdail, D. H. and Slater, M. J., Published for SCI by Elsevier Applied Science, (1993), 167-174.

12. Sokolov, A. B., Privalova, M. M., “Investigation of Behavior of Micro-impurities During Rhenium Solvent Extraction from Solutions Containing Tungsten (6) and Rhenium (7). Micro-impurities: Be, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, As, Sr, Y, Zr, Nb, Ru, Cd, In, Sn, Sb, Te, Cs, Ce, Hg and Tl”, Journal of Analytical Chemistry of the USSR, 10, 41, (1986), 1854-1857.

13. Hundson Boy Mining and Smelting Co., “Selective Extractions of Zn and Cd from Zn-Cd-Co-Ni Sulphate Solution Using Di-2-Ethylhexyl Phosphoric Acid Extractant”, Hydeometallurgy, 47, (1998), 205-215.

14. Flett, D. S. and Sprink, D. R., “Solvent Extraction of Non-Ferrous Metals: A Review 1972 — 1974”, Hydrometallurgy, No. 1, (1976), 204-207

15. Flett, D. S., “Solvent Extraction of Non-Ferrous Metals: A Review 1975 — 1976”, Warren Spring Laboratory, L. S. 254 (Me) (1977).

16. Ziel i n ski , S . , B u ca, M. and Famul ski, M., “Precipitation – Stripping Processes for Heavy Metals”, Hydrometallurgy, 48, (3), (1998), 253-263.

17. Owusu, G., “Selective Extractions of Zn and Cd from Zn-Cd-Co-Ni Sulphate Solution Using Di-2-Ethylhexyl Phosphoric Acid Extractant”, Hydrometallurgy, 47 (2-3), (1998), 205-215.

18. Zhang, P., Yokoyama, T., Itabaashi, O., Wakui, Y., Suzuki, T. and Inove, K., “Hydrometallurgical Process for Recovery of Metal Values from Spent Nickel-Metal Hydride Secondary Batteries”, Hydrometallurgy, 50 (1), (1998), 61-75.

19. Alguacil, F. J. and Alonso, M., “The Effect of Ammonium Sulphate and Ammonia on the Liquid–Liquid Extraction of Zinc Using LIX 54”,Hydrometallurgy, 53 (2), (1999), 203-209.

20. Cole, P. M. and Sole, K. C., “Zinc Solvent Extraction in the Process Industries", Mineral Processing and Extractive Metallurgy Review, (2003), 24, (2).

21. Keshavarz Alamdari, E., Moradkhani, D., Darvishi, D., Askari, M. and Behnian, D., “Zinc Solvent Extraction in the Process Industries”, Minerals Engineering, 17, (1), (2004), 89-92

22. Bart, H. J., Marr, R., Scheks, J. and Koncar, M., Hydrometallurgy, 31, (1992), 13-28.

23. Amer, S., Figueiredo, J. M., Luis, A., “The Recovery of Zinc from the Leach Liquors of the Cenim-Lneti Process by Solvent Extraction with Di (-2- Ethylhexyl) Phosphoric Acid, Hydrometallurgy, 37, (1995), 323-337.

24. Wassink, B., Dreisinger, D., Howard, J., “Solvent Extraction Separation of Zinc and Cadmium from Nickel and Cobalt Using Aliquat 336, a Strong Base Anion Exchanger, in the Chloride and Thiocyanate Forms”, Hydrometallurgy, 57, (2000), 235–252.

International Journal of Engineering
E-mail: office@ije.ir
Web Site: http://www.ije.ir