Hydrometallurgical process for extracting uranium

Details Hydrometallurgical process for extracting uranium Hydrometallurgical process for extracting uranium

C - Chemistry, Metallurgy

22

B

53/212

C22B 60/02 (2006.01)

Patent

CA 1116868

GC77 ABSTRACT In a process according to the present invention uranium is extracted into solution form its ore by leaching with an aqueous solution containing peroxomonosulphuric acid, the peroxoacid oxidising the uranium through to its hexavalent state. Preferably the leaching is carried out at a temperature in the range of 50 to 100°C. The leach liquor can initially contain additional amounts of sulphuric acid or merely that present by virtue of the method of making the peroxomonosulphuric acid. In a preferred method of operation, the peroxoacid is introduced progressively into the leach liquor during the course of the leaching so as to maintain an electrochemical potential in the range of 450 to 650 mV. By use of the process, uranium is cleanly extracted into solution.

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