Process for stripping uranium from an alkyl pyrophosphoric acid

Details Process for stripping uranium from an alkyl pyrophosphoric acid Process for stripping uranium from an alkyl pyrophosphoric acid

C - Chemistry, Metallurgy

22

B

53/216

C22B 60/02 (2006.01)

Patent

CA 1193444

Process For Stripping Uranium From An Alkyl Pyrophosphoric Acid Abstract A process is described for the recovery of tetravalent uranium from wet-process phosphoric acid utilizing an alkyl pyrophosphoric acid extractant or the like. After extracting the tetravalent uranium from wet-process acid, iron is stripped from the pregnant extractant into an oxalic acid stripping solution and then the tetravalent uranium is stripped from the pregnant extractant into an oxalate stripping solution. The oxalate stripping solution is an aqueous solution of an alkali metal or ammonium oxalate. The barren extractant is recycled for contacting with fresh wet-process acid. The uranium is oxidized and then precipitated in the oxalate stripping solution. The precipitated solids are separated from the solution, and the uranium is dried to a UO3 product.

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