Thermodynamic Study of Uranium Extraction from Tunisian Wet Process Phosphoric Acid
In the present paper, an experimental investigation was conducted to study the thermodynamic of uranium extraction from Tunisian wet phosphoric acid using the synergistic solvent mixture of di-2-ethylhexyl phosphoric acid (DEHPA) and trioctyl phosphine oxid (TOPO) diluted in kerosene. The effect of different factors affecting the extraction process (temperature, TOPO and DEHPA concentrations) has been investigated. The obtained data of temperature effect on the extraction showed that the enthalpy change is -35.8 kJ.mol-1. The slope analysis method was used for determining the stoichiometry of the extracted species.
[1] R. Magdi and K. Mohamed, "Uranium fuel as byproduct fertilizer production,” in INREC 10, Jordan, 2010, pp. 21–24.
[2] H. Singh, Development of innovative processes for the separation of high purity uranium from phosphoric acid, Rare earth development section.
[3] K. J. Ring, Manufacture of phosphatic fertilizers and recovery of byproduct uranium-a review, AAEC/E355.
[4] F. J. Hurst, Uranium from phosphoric acid, ORNL, Tennessee 37830, pp15-17, 1983.
[5] S. Harvinderpal, S.L. Mishra, M. Anitha, A.B. Giriyalker, R. Vijayalakshmi and M.K. Kotekar, "Uranium extraction from partially neutralised and diluted phosphoric acid using a synergistic organophosphorous solvent mixture,” Hydrometallurgy, vol.70, pp.197–203, 2003.
[6] M. R. Khaled and K. A. Ali, "Uranium extraction from purified wet process Jordanian phosphoric acid: A development study,” Hydrometallurgy, vol. 56, pp. 309–322, 2000.
[7] S. K. Singh, P.S. Dhami, S.C. Tripathi, A. Dakshinamoorthy, "Studies on the recovery of uranium from phosphoric acid medium using synergistic mixture of (2-Ethyl hexyl) P hosphonic acid, mono (2-ethyl hexyl) ester (PC88A) and Tri-n-butyl phosphate (TBP),” Hydrometallurgy, vol. 95, pp. 170–174, 2009.
[8] S. Harvinderpal, S.L. Mishra, R. Vijayalakshmi, "Uranium recovery from phosphoric acid by solvent extraction using a synergistic mixture of di-nonyl phenyl phosphoric acid and tri-n-butyl phosphate,” Hydrometallurgy, vol. 73, pp. 63–70, 2004.
[9] S. Harvinderpal, R. Vijayalakshmi, S.L. Mishra, C.K. Gupta, Studies on uranium extraction from phosphoric acid using di-nonyl phenyl phosphoric acid-based synergistic mixtures, Hydrometallurgy 59, 69–76, 2001.
[10] P. Gasôs and A. Moral, "The D2T process of uranium recovery from phosphoric acid: A process model," Proceedings of a technical committee meeting, Vienna, pp. 26-29, 1983.
[11] F.J. Hurst et D.J. Crouse, "Recovery of uranium from Di(2-Ethylhexyl) Phosphoric acid (DAPEX) Extractant with ammonium carbonate,” ORNL-2952.
[12] S. Khorfan, O. Shino, A. Wahoud and A. Dahdouh, "Stripping of uranium from DEHPA/TOPO solvent by ammonium carbonate solutions,” Periodica Polytechnica Ser. Chem. Eng. Vol. 44, No. 2, pp. 123–132 , 2000.
[13] S. Girgin, N. Acarkan, A. Ali Sirkeci,” The uranium (VI) extraction mechanism of D2EHPA-TOPO from a wet process phosphoric acid,” Journal of Radioanalytical and Nuclear Chemistry, Vol. 251, pp. 263–271, 2002.
[1] R. Magdi and K. Mohamed, "Uranium fuel as byproduct fertilizer production,” in INREC 10, Jordan, 2010, pp. 21–24.
[2] H. Singh, Development of innovative processes for the separation of high purity uranium from phosphoric acid, Rare earth development section.
[3] K. J. Ring, Manufacture of phosphatic fertilizers and recovery of byproduct uranium-a review, AAEC/E355.
[4] F. J. Hurst, Uranium from phosphoric acid, ORNL, Tennessee 37830, pp15-17, 1983.
[5] S. Harvinderpal, S.L. Mishra, M. Anitha, A.B. Giriyalker, R. Vijayalakshmi and M.K. Kotekar, "Uranium extraction from partially neutralised and diluted phosphoric acid using a synergistic organophosphorous solvent mixture,” Hydrometallurgy, vol.70, pp.197–203, 2003.
[6] M. R. Khaled and K. A. Ali, "Uranium extraction from purified wet process Jordanian phosphoric acid: A development study,” Hydrometallurgy, vol. 56, pp. 309–322, 2000.
[7] S. K. Singh, P.S. Dhami, S.C. Tripathi, A. Dakshinamoorthy, "Studies on the recovery of uranium from phosphoric acid medium using synergistic mixture of (2-Ethyl hexyl) P hosphonic acid, mono (2-ethyl hexyl) ester (PC88A) and Tri-n-butyl phosphate (TBP),” Hydrometallurgy, vol. 95, pp. 170–174, 2009.
[8] S. Harvinderpal, S.L. Mishra, R. Vijayalakshmi, "Uranium recovery from phosphoric acid by solvent extraction using a synergistic mixture of di-nonyl phenyl phosphoric acid and tri-n-butyl phosphate,” Hydrometallurgy, vol. 73, pp. 63–70, 2004.
[9] S. Harvinderpal, R. Vijayalakshmi, S.L. Mishra, C.K. Gupta, Studies on uranium extraction from phosphoric acid using di-nonyl phenyl phosphoric acid-based synergistic mixtures, Hydrometallurgy 59, 69–76, 2001.
[10] P. Gasôs and A. Moral, "The D2T process of uranium recovery from phosphoric acid: A process model," Proceedings of a technical committee meeting, Vienna, pp. 26-29, 1983.
[11] F.J. Hurst et D.J. Crouse, "Recovery of uranium from Di(2-Ethylhexyl) Phosphoric acid (DAPEX) Extractant with ammonium carbonate,” ORNL-2952.
[12] S. Khorfan, O. Shino, A. Wahoud and A. Dahdouh, "Stripping of uranium from DEHPA/TOPO solvent by ammonium carbonate solutions,” Periodica Polytechnica Ser. Chem. Eng. Vol. 44, No. 2, pp. 123–132 , 2000.
[13] S. Girgin, N. Acarkan, A. Ali Sirkeci,” The uranium (VI) extraction mechanism of D2EHPA-TOPO from a wet process phosphoric acid,” Journal of Radioanalytical and Nuclear Chemistry, Vol. 251, pp. 263–271, 2002.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:66245", author = "N. Khleifia and A. Hannachi and N. Abbes", title = "Thermodynamic Study of Uranium Extraction from Tunisian Wet Process Phosphoric Acid", abstract = "In the present paper, an experimental investigation was conducted to study the thermodynamic of uranium extraction from Tunisian wet phosphoric acid using the synergistic solvent mixture of di-2-ethylhexyl phosphoric acid (DEHPA) and trioctyl phosphine oxid (TOPO) diluted in kerosene. The effect of different factors affecting the extraction process (temperature, TOPO and DEHPA concentrations) has been investigated. The obtained data of temperature effect on the extraction showed that the enthalpy change is -35.8 kJ.mol-1. The slope analysis method was used for determining the stoichiometry of the extracted species.
", keywords = "DEHPA-TOPO, extraction, phosphoric acid, stoichiometry, uranium. ", volume = "7", number = "11", pages = "855-4", }
