Solvent extraction of phenols from water
Methyl isobutyl ketone (MIBK) and diisopropyl ether (DIPE) were evaluated as solvents for extraction of phenols from water by measuring the equilibrium distribution coefficients (K/sub d/) as a function of pH for phenol, dihydroxybenzenes, and trihydroxybenzenes at 25/sup 0/C. MIBK gave much higher K/sub d/ values than DIPE, particularly for the polyhydric phenols, so that solvent-to-water mass flow ratios (S/W) exceeding 0.14 and 0.39 would be required at low pH for effective removal of di- and trihydric phenols, respectively, with MIBK, compared with S/W greater than or equal to 1.4 and 8, respectively, for DIPE. The effect of pH was described by a simple ionization model. In the phenol/water/MIBK system, K/sub d/ values increased with decreasing temperature (30 to 75/sup 0/C) at all concentrations, and at 30/sup 0/C, they were high enough for the effective extraction of phenol contained at up to 20% by wt in the organic phase. Vacuum steam stripping was the best choice for the removal of residual dissolved MIBK. Extraction with MIBK may thus be used to recover, rather than degrade, phenols contained in aqueous streams from refining, petrochemical, and coal conversion processes.
- Research Organization:
- California Univ., Berkeley
- OSTI ID:
- 6321408
- Report Number(s):
- CONF-800610-
- Journal Information:
- AIChE Pap.; (United States), Vol. 58A; Conference: American Institute of Chemical Engineers conference, Philadelphia, PA, USA, 8 Jun 1980
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
METHYL ISOBUTYL KETONE
SOLVENT PROPERTIES
ORGANIC SOLVENTS
COMPARATIVE EVALUATIONS
PHENOLS
RECOVERY
SOLVENT EXTRACTION
WASTE WATER
WATER TREATMENT
AQUEOUS SOLUTIONS
AROMATICS
CHEMICAL EFFLUENTS
COAL LIQUEFACTION PLANTS
COAL PREPARATION PLANTS
DISTRIBUTION FUNCTIONS
EQUILIBRIUM
ETHERS
EXPERIMENTAL DATA
MATHEMATICAL MODELS
MEDIUM TEMPERATURE
PETROCHEMICAL PLANTS
PETROLEUM REFINERIES
PH VALUE
REFINING
REMOVAL
WATER
CHEMICAL PLANTS
DATA
DISPERSIONS
EXTRACTION
FUNCTIONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INDUSTRIAL PLANTS
INFORMATION
KETONES
LIQUID WASTES
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
PROCESSING
SEPARATION PROCESSES
SOLUTIONS
SOLVENTS
WASTES
020800* - Petroleum- Waste Management
010800 - Coal
Lignite
& Peat- Waste Management
400105 - Separation Procedures