Removing oxygen from a solvent extractant in an uranium recovery process

Patent · Sun Jan 01 04:00:00 EST 1984

OSTI ID:864899

Hurst, Fred J ^[1]; Brown, Gilbert M ^[2]; Posey, Franz A ^[3]

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1. Oak Ridge, TN
2. Knoxville, TN
3. Concord, TN

An improvement in effecting uranium recovery from phosphoric acid solutions is provided by sparging dissolved oxygen contained in solutions and solvents used in a reductive stripping stage with an effective volume of a nonoxidizing gas before the introduction of the solutions 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 mixtures thereof, displace oxygen from the solutions and solvents thereby reduce deleterious effects of oxygen such as excessive consumption of elemental or ferrous and accumulation of complex iron phosphates or cruds.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by Department of Energy (Washington, DC)
• Patent Number(s): US 4432945
• OSTI ID: 864899
• Country of Publication: United States
• Language: English

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