A thermodynamic model of nitric acid extraction by tri-n-butyl phosphate
A thermodynamic model is presented for nitric acid extraction by tri-n-butyl phosphate (TBP). This model is based on the formation of the organic phase species: TBP.HNO/sub 3/ and (TBP)/sub 2/.HNO/sub 3/. The model works successfully at TBP concentrations of 5 to 100 vol% and was found to be effective at predicting the extraction of HNO/sub 3/ from HNO/sub 3//NaNO/sub 3/ and HNO/sub 3//LiNO/sub 3/ solutions. Within the TBP concentration range of 5 to 30%, a single set of extraction constants was sufficient to fit extraction data. Stoichiometric activity coefficients of nitric acid in HNO/sub 3//NaNO/sub 3/ and HNO/sub 3//LiNO/sub 3/ mixtures were calculated using a model developed by Bromley.
- Research Organization:
- Argonne National Lab., Chemical Technology Div., Argonne, IL (US)
- OSTI ID:
- 6661264
- Journal Information:
- Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 82:1; ISSN NUTYB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400105* -- Separation Procedures
ALKALI METAL COMPOUNDS
BUTYL PHOSPHATES
DISPERSIONS
ESTERS
EXTRACTION
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LITHIUM COMPOUNDS
LITHIUM NITRATES
MATHEMATICAL MODELS
MIXTURES
NITRATES
NITRIC ACID
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PARTICLE MODELS
PHASE STUDIES
PHOSPHORIC ACID ESTERS
SEPARATION PROCESSES
SODIUM COMPOUNDS
SODIUM NITRATES
SOLUTIONS
SOLVENT EXTRACTION
SOLVENT PROPERTIES
STATISTICAL MODELS
STOICHIOMETRY
TBP
THERMODYNAMIC MODEL