Copper(II) removal from aqueous solutions by chelation in supercritical carbon dioxide using fluorinated {beta}-diketones
- Univ. of Connecticut, Storrs, CT (United States)
Copper removal from aqueous solutions by chelation in supercritical carbon dioxide was investigated. The chelating agents were 1,1,1-trifluoroacetylacetone (TFA) and 2,2-dimethyl-6,6,7,7,8,8,8-heptafluoro-3,5-octanedione (FOD). Extraction efficiencies were determined for a single equilibrium stage in the temperature range 308--328 K and the pressure range 9.9--24.0 MPa and ranged from 4% to 84%. The extraction efficiencies increased with increasing the initial amount of chelating agent and with decreasing the initial copper concentration. No significant changes in extraction efficiencies were observed with temperature and pressure at a fixed initial amount of chelating agent. A thermodynamic model based on combined reaction and phase equilibria was also developed for prediction of extraction efficiencies.
- OSTI ID:
- 603790
- Journal Information:
- Industrial and Engineering Chemistry Research, Vol. 36, Issue 12; Other Information: PBD: Dec 1997
- Country of Publication:
- United States
- Language:
- English
Similar Records
Supercritical fluid extraction of thorium and uranium ions from solid and liquid materials with fluorinated [beta]-diketones and tributyl phosphate
Synthesis and characterization of volatile bismuth [beta]-diketonate compounds for metal-organic chemical vapor deposition of thin films