C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
252/18, 53/216
C22B 60/02 (2006.01) B01D 61/40 (2006.01) G21F 9/00 (2006.01)
Patent
CA 1103227
ABSTRACT OF THE DISCLOSURE This invention relates to a process for recovering uranyl cation from a wet process phosphoric acid feed solution comprising contacting the feed with a water-in-oil emulsion having an interior phase containing an aqueous solution of ferrous ions surrounded by a water immiscible, oily exterior phase. The external phase contains a solution of di(2-ethylhexyl) phosphoric acid and tri- ctylphosphine oxide which transport the uranyl cations from the feed solution, through the exterior phase, to the interior phase of the emulsion wherein the uranyl ions are reduced to uranous ions and are thereby trapped in the emulsion.The emulsion is separated from the feed solution and the uranium is recovered. The extraction efficiency of this process ranges from about 50-1,000 compared to an efficiency of only about 1 to 7 conventional solvent processes.
292682
Bruncati Robert L.
Frankenfeld John W.
Li Norman N.
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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