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Denis Beltrami, A. Chagnes, H. Mokhtari, B. Courtaud, G. Cote (2014)
Pysicochemical Phenomena Involved in the Recovery of Uranium from Phosphate by BiDiBOPP/di-n-HMOPO and Development of New Cationic ExtractantsProcedia Engineering, 83
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Recovery of uranium (VI) from concentrated phosphoric acid by mixtures of new bis(1,3- dialkyloxypropan-2-yl) phosphoric acids and tri-n-octylphosphine oxideHydrometallurgy, 140
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Liquid-liquid extraction of uranium(VI) with 2-ethylhexyltolylsulfoxide (EHTSO)Journal of Radioanalytical and Nuclear Chemistry, 251
Denis Beltrami, G. Cote, H. Mokhtari, B. Courtaud, A. Chagnes (2012)
Modeling of the extraction of uranium (VI) from concentrated phosphoric acid by synergistic mixtures of bis-(2-ethylhexyl)-phosphoric acid and tri-n-octylphosphine oxideHydrometallurgy, 129
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N. Khleifia, A. Hannachi, N. Abbès (2014)
Thermodynamic Study of Uranium Extraction from Tunisian Wet Process Phosphoric AcidWorld Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering, 7
Uranium(VI) recovery from concentrated Egyptian hemi-dihydrate wet-process phosphoric acid, 9.2 M, is investigated using synergistic organophosphorous solvent mixture of dinonyl phenyl phosphoric acid (DNPPA) and tris(2-ethylhexyl)phosphate (TEP). The effect of various factors such as [DNPPA] concentration, [TEP] concentration, phosphoric acid concentration, shaking time, aqueous: organic phase’s ratio (V aq/V org), stability of the solvent, the diluents effect, and temperature on the degree of extraction has been established. The effect of different stripping agents was investigated. The enthalpy change of the uranium extraction process was determined and the extracted uranium is further subjected to a second cycle of extraction [0.3 M D2EHPA + 0.075 M TOPO], scrubbing impurities (5 M sulfuric acid), and finally stripping with 1 M (NH4)2CO3 solution. Precipitation of uranium in highly pure UO3 product using hydrogen peroxide and heat treatment at 375 °C were carried out.
International Journal of Industrial Chemistry – Springer Journals
Published: Nov 2, 2015
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