Method for oxygen reduction in a uranium recovery process

Details Method for oxygen reduction in a uranium recovery process Method for oxygen reduction in a uranium recovery process

C - Chemistry, Metallurgy

22

B

53/216

C22B 60/02 (2006.01)

Patent

CA 1196501

METHOD FOR OXYGEN REDUCTION IN A URANIUM RECOVERY PROCESS Abstract of the Disclosure An improvement in effecting uranium recovery from phosphoric acid solutions is provided by sparging dissolved oxygen contained in solu- tions and solvents used in a reductive stripping stage with an effec- tive volume of a nonoxidizing gas before the introduction of the solu- tions and solvents into the stage. Effective volumes of nonoxidizing gases, selected from the group consisting of argon, carbon dioxide, carbon monoxide, helium, hydrogen, nitrogen, sulfur dioxide, and mix- tures thereof, displace oxygen from the solutions and solvents thereby reduce deleterious effects of oxygen such as excessive consumption of elemental or ferrous iron and accumulation of complex iron phosphates or cruds.

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