Thermodynamic modeling of chemical equilibria in metal extraction. [PUREX, TRUEX solvents]

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5372281

Chaiko, D J; Fredickson, D R; Reichley-Yinger, L; Vandegrift, G F

Models of equilibrium extraction data are being developed for use in computer simulations of metal extraction processes. The correlations are based on chemical mass action principles in which the effects of metal complexation and aqueous phase activity coefficients are considered. Activity coefficients in mixed electrolyte solutions at high ionic strengths are calculated using methods available in the literature. This modeling approach is demonstrated for HNO/sub 3/ extraction with both the PUREX and TRUEX solvents and for Am/sup 3 +/ extraction by octyl-phenyl-N,N-diisobutylcarbamoylmethylphosphine oxide, which is the primary extractant in the TRUEX solvent. 23 refs., 4 figs., 4 tabs.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5372281
• Report Number(s): CONF-871016-1; ON: DE88006006
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ACTINIDES
AMERICIUM
AQUEOUS SOLUTIONS
BUTYL PHOSPHATES
COMPUTERIZED SIMULATION
DISPERSIONS
ELEMENTS
EQUILIBRIUM
ESTERS
EXTRACTION
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MATHEMATICAL MODELS
METALS
MIXTURES
NITRIC ACID
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC SOLVENTS
OXYGEN COMPOUNDS
PHOSPHINE OXIDES
PHOSPHINES
PHOSPHORIC ACID ESTERS
PHOSPHORUS COMPOUNDS
PUREX PROCESS
REPROCESSING
SALTS
SEPARATION PROCESSES
SIMULATION
SOLUTIONS
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SOLVENTS
TBP
THERMODYNAMICS
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS