Chemically based synergic solvent extraction model for the system Nd(NO/sub 3/)/sub 3/-HDEHP-TBP-benzene
A chemically based synergic solvent extraction model has been developed for the system Nd(NO/sub 3/)/sub 3/-HDEHP-TBP-benzene. The model equation for the distribution ratio can be written as D/sub c/ = K/sub 1/ ..cap alpha../sub 0/((HG)/sub 2/)/sub O/sup 3//(TBP)O/sup 3/(H/sup +/)/sub A/sup -3//, where K/sub 1/ is the effective equilibrium constant containing the quotient of the activity coefficients of the reacting species and ..cap alpha../sub 0/ is the degree of formation of the neodymium complex in the equilibrated aqueous phase. ((HG)/sub 2/)/sub 0/, (TBP)/sub 0/, and (H/sup +/)/sub A/ denote the equilibrated HDEHP, TBP, and aqueous hydrogen ion concentrations, respectively. Experimental equilibrium distribution data generated in this work were used to test the model equation. Correlation coefficients between the experimental data and the predicted values are in the range of 0.899 to 0.983.
- Research Organization:
- Ames Lab., IA (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 5253307
- Report Number(s):
- IS-M-281; CONF-800918-1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400105* -- Separation Procedures
AROMATICS
BENZENE
BUTYL PHOSPHATES
CORRELATIONS
ELEMENTS
EQUATIONS
ESTERS
EXTRACTION
HDEHP
HYDROCARBONS
METALS
NEODYMIUM
NEODYMIUM COMPOUNDS
NEODYMIUM NITRATES
NITRATES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHORIC ACID ESTERS
RARE EARTH COMPOUNDS
RARE EARTHS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SYNERGISM
TBP