Removing oxygen from a solvent extractant in an uranium recovery process

Patent · Sun Jan 01 00:00:00 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 (United States)
• 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

Related Subjects

removing
oxygen
solvent
extractant
uranium
recovery
process
improvement
effecting
phosphoric
acid
solutions
provided
sparging
dissolved
contained
solvents
reductive
stripping
stage
effective
volume
nonoxidizing
gas
introduction
volumes
gases
selected
consisting
argon
carbon
dioxide
monoxide
helium
hydrogen
nitrogen
sulfur
mixtures
displace
reduce
deleterious
effects
excessive
consumption
elemental
ferrous
accumulation
complex
iron
phosphates
cruds
reductive stripping
dissolved oxygen
iron phosphate
acid solutions
oxidizing gas
acid solution
carbon dioxide
carbon monoxide
phosphoric acid
sulfur dioxide
recovery process
reduce deleterious
removing oxygen
deleterious effects
uranium recovery
deleterious effect
solvent extract
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