Separation of phenols from dilute aqueous solution by use of tri-n-octyl phosphine oxide as extractant
Journal Article
·
· Solvent Extr. Ion Exch.; (United States)
Trioctyl phosphine oxide (TOPO) is examined as an extractant for phenol and other phenolic compounds. Equilibrium distribution coefficients have been measured for extraction of phenol, dihydroxybenzenes, and trihydroxybenzenes by solvents composed of TOPO in various diluents. Results are interpreted in terms of a model based upon complexation stoichiometry, allowing for solvation of uncomplexed solute as well. TOPO is a strong complexant for all the phenolic solutes studied. The nature of the diluent has a significant effect upon distribution coefficients, and in the case of an alcohol diluent reduces the distribution coefficient for phenol considerably. The degree of complexation remains appreciable at temperatures which would be used for regeneration of phenol by distillation. This makes it necessary to use a diluent boiling at least 70/sup 0/C to 80/sup 0/C higher than the boiling point of phenol, which is 182/sup 0/C. Regeneration studies are reported for isobutyl heptyl ketone, dimethylnaphthalene, and a mixture of dimethylnaphthlene and n-octadecane as diluents. Extraction with TOPO will be most worthy of consideration for feed concentrations of phenol equal to 3000 ppM or less, or for extraction of di- and tri-hydroxybenzenes.
- Research Organization:
- Univ. of California, Berkeley
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5384399
- Journal Information:
- Solvent Extr. Ion Exch.; (United States), Journal Name: Solvent Extr. Ion Exch.; (United States) Vol. 3:1-2; ISSN SEIED
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
AQUEOUS SOLUTIONS
AROMATICS
DATA
DISPERSIONS
EXPERIMENTAL DATA
EXTRACTION
HYDROXY COMPOUNDS
INFORMATION
MATHEMATICAL MODELS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHENOLS
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
TOPO
400105* -- Separation Procedures
AQUEOUS SOLUTIONS
AROMATICS
DATA
DISPERSIONS
EXPERIMENTAL DATA
EXTRACTION
HYDROXY COMPOUNDS
INFORMATION
MATHEMATICAL MODELS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHENOLS
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
TOPO