Removing oxygen from a solvent extractant in an uranium recovery process
Abstract
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.
- Inventors:
-
- Oak Ridge, TN
- Knoxville, TN
- Concord, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 864899
- Patent Number(s):
- 4432945
- Assignee:
- United States of America as represented by Department of Energy (Washington, DC)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
- DOE Contract Number:
- W-7405-ENG-26
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 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; /423/
Citation Formats
Hurst, Fred J, Brown, Gilbert M, and Posey, Franz A. Removing oxygen from a solvent extractant in an uranium recovery process. United States: N. p., 1984.
Web.
Hurst, Fred J, Brown, Gilbert M, & Posey, Franz A. Removing oxygen from a solvent extractant in an uranium recovery process. United States.
Hurst, Fred J, Brown, Gilbert M, and Posey, Franz A. Sun .
"Removing oxygen from a solvent extractant in an uranium recovery process". United States. https://www.osti.gov/servlets/purl/864899.
@article{osti_864899,
title = {Removing oxygen from a solvent extractant in an uranium recovery process},
author = {Hurst, Fred J and Brown, Gilbert M and Posey, Franz A},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1984},
month = {Sun Jan 01 00:00:00 EST 1984}
}
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