Extraction of phenols from water with tri-octyl phosphine oxide
Tri-octyl phosphine oxide (TOPO) was examined as an extractant for removing phenol; the dihydric phenols catechol, resorcinol, and hydroquinone; and the trihydric phenols pyrogallol, phloroglucinol, and 1,2,4-benzenetriol from water. Distribution coefficients were measured and results modelled for extractions with different diluents, solvent compositions, temperatures, and extractant-to-solute stoichiometric ratios. Modelling of the results indicates that the extraction mechanism is complicated, with the diluent probably playing an important role. The most effective diluents are those that have some electron-donating ability and are thus able to solvate the solute-TOPO complex, without competing with the solute for the phosphoryl oxygen on TOPO. The distribution coefficients decrease with increasing temperature, and show a linear dependence when plotted as ln(K/sub D/) vs. l/T.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5302839
- Report Number(s):
- LBL-13963; ON: DE82012538
- Resource Relation:
- Other Information: Thesis
- Country of Publication:
- United States
- Language:
- English
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Regeneration of tri-octyl phosphine oxide solutions used to extract phenol from water
SOLVENT EXTRACTION OF INORGANIC IONS WITH TRI-N-OCTYL PHOSPHINE OXIDE
Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
PHENOLS
SOLVENT EXTRACTION
TOPO
SOLVENT PROPERTIES
REMOVAL
SEPARATION PROCESSES
WATER
WATER POLLUTION CONTROL
AROMATICS
CONTROL
EXTRACTION
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION CONTROL
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)
400300 - Organic Chemistry- (-1987)
400105 - Separation Procedures