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Title Solvent extraction of phenols from water

Creator/Author Greminger, D.C. ; Burns, G.P.; Lynn, S. ; Hanson, D.H.; King, C.J.

Publication Date 1980 Feb 01

OSTI Identifier OSTI ID: 5522888

Report Number(s) LBL-10480; CONF-800610-1

DOE Contract Number W-7405-ENG-48

Resource Type Conference/Event

Specific Type Technical Report

Resource Relation American Institute of Chemical Engineering conference, Philadelphia, PA, USA, 8 Jun 1980

Research Org California Univ., Berkeley (USA). Lawrence Berkeley Lab.

Subject 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; PHENOLS;

SOLVENT EXTRACTION; ETHERS; KETONES; ORGANIC SOLVENTS; PH VALUE;

REMOVAL; STEAM; WATER; AROMATICS; EXTRACTION; HYDROGEN COMPOUNDS;

HYDROXY COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC OXYGEN COMPOUNDS;

OXYGEN COMPOUNDS; SEPARATION PROCESSES; SOLVENTS

Description/Abstract Methyl isobutyl ketone (MIBK) and diisopropyl ether (DIPE) have been evaluated as solvents

for extraction of phenols, at high dilution, from water. Equilibrium distribution coefficients

(K/sub D/) have been measured for phenol, dihydroxybenzenes and trihydroxybenzenes in

both solvents as a function of pH. Particularly for the multihydric phenols, MIBK gives

substantially higher values of K/sub D/ than does DIPE. The effect of pH can be described

quantitatively through a simple ionization model, using published values of dissociation

constants for the various phenols. Some method for removal of residual dissolved solventmust ordinarily be included in any extraction process for phenols. Possibilities include

atmospheric-steam or inert-gas stripping, vacuum-steam stripping, and extraction with a

second solvent. Vacuum-steam stripping is a particularly attractive choice for removal of

MIBK; this reinforces the utility of MIBK as a solvent. The optimal temperature for vacuum

stripping is generally the temperature of the extraction operation, which in turn is related to the

effect of temperature on K/sub D/. Values of K/sub D/ for phenol-water-MIBK were

determined at 30, 50, and 75/sup 0/C, and were found to decrease with increasing

temperature at all concentrations.

Country of Publication United States

Language English

ADOPT-A-DOC?

Best matches for phenol-water-mibk lle

Values of K/sub D/ for phenol-water-MIBK were determined

30, 50, and 75/sup 0 /C, and were found to decrease with

increasing temperature... Jump to text

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8/6/2019 Energy Citations Database (ECD) - - Document #5522888

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