Reactor analysis of metal ion extraction in liquid dispersions
A comprehensive research program is undertaken to predict the effects of mixing on the extraction efficiency for Co(NO3)2-Di-2-ethylhexyl phosphoric acid in toluene system in mechanically agitated dispersed phase reactors. The experimental and theoretical studies on this complex hydrometallurgical extraction system have yielded the following results. A) A two phase organic and aqueous equilibrium model, which accounts for the aqueous phase equilibria, is developed to predict the distribution of cobalt. The equilibrium model is based on cobalt ion complexation with the DEPHA dimer as suggested by Komasawa et al. The aqueous phase activities are represented by the Davies Model. B) Physical mass transfer and chemical extraction experiments conducted in a stirred transfer reactor show that the reaction occurs in the aqueous film. A two film diffusion-reaction model is developed to accurately predict the observed fluxes over the experimental range. The composition and temperature ranges for the equilibrium and kinetic experiments are, respectively: a) pH, 3-5; (Co)/sub T/, 0.001 to 0.1 M; (DEHPA)2, 0.1 to 1.0 M; T, 25-50C, and b) pH, 3-5; (Co)/sub T/, 0.001 to 0.1 M; (DEHPA)2, 0.01 to 0.5 M; T = 25C. C) A previously developed Monte Carlo Simulation procedure is employed with the above equilibrium and kinetic models to predict the effect of droplet mixing on extraction efficiency for various process variables. The above experimental and theoretical procedure can be applied to the study of other two phase dispersion systems and can be extended to multiple reactors.
- Research Organization:
- Syracuse Univ., NY
- DOE Contract Number:
- AC02-82ER13002
- OSTI ID:
- 6165924
- Report Number(s):
- CONF-851011-
- Journal Information:
- Sep. Sci. Technol.; (United States), Journal Name: Sep. Sci. Technol.; (United States) Vol. 22:2/3; ISSN SSTED
- Country of Publication:
- United States
- Language:
- English
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Reactor analysis for selective metal ion extraction in liquid dispersions. Progress report
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Related Subjects
400105* -- Separation Procedures
AQUEOUS SOLUTIONS
CHEMICAL REACTION KINETICS
CHEMICAL REACTORS
COBALT
DATA
DIFFUSION
DISPERSIONS
DISTRIBUTION FUNCTIONS
ELEMENTS
EQUILIBRIUM
EXPERIMENTAL DATA
EXTRACTION
FUNCTIONS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
KINETICS
MASS TRANSFER
MATHEMATICAL MODELS
METALS
MIXING
MIXTURES
NUMERICAL DATA
ORGANIC SOLVENTS
PH VALUE
PHASE STUDIES
PHOSPHORIC ACID
REACTION KINETICS
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SOLVENTS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS