Comparison of bulk, emulsion, thin sheet supported, and hollow fiber supported liquid membranes in macrocycle-mediated cation separations
Conference
·
· Sep. Sci. Technol.; (United States)
OSTI ID:6256354
The advantages, disadvantages, and possible applications of macrocycle-mediated bulk, emulsion, supported and hollow fiber liquid membranes have been investigated. The relative transport rates of the alkali metal cations and of Zn(II), Cd(II) and Hg(II) in single and competitive cation experiments are studied and compared in the different membrane types. The four membrane types demonstrate similar selectivities but significantly different cation fluxes under comparable conditions using analogous macrocyclic carriers. The degree of distribution of the macrocycle to the organic membrane which is necessary for significant transport varies dramatically among the membrane types, each of which requires unique solvent characteristics. In the experiments, either 18-crown-6, dicyclohexano-18-crown-6, or 4,4'(5)bis(1-hydroxyheptylcyclohexano)-18-crown-6 were incorporated into bulk (chloroform, methylene chloride), emulsion (toluene), supported (phenylhexane) and hollow fiber (phenylhexane or 1-octanol) liquid membranes with the membrane solvents shown in parentheses.
- Research Organization:
- Brigham Young Univ., Provo, UT (USA)
- OSTI ID:
- 6256354
- Report Number(s):
- CONF-871038-
- Conference Information:
- Journal Name: Sep. Sci. Technol.; (United States) Journal Volume: 23:12,13
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ALCOHOLS
CADMIUM COMPOUNDS
CATIONS
CHARGED PARTICLES
COLLOIDS
DATA
DISPERSIONS
EFFICIENCY
EMULSIONS
EXPERIMENTAL DATA
FLUIDS
GLYCOLS
HYDROXY COMPOUNDS
INFORMATION
IONS
LIQUIDS
MASS TRANSFER
MEMBRANES
MERCURY COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SOLVENTS
POLYETHYLENE GLYCOLS
POLYMERS
SEPARATION PROCESSES
SOLVENT PROPERTIES
SOLVENTS
SUPPORTED LIQUID MEMBRANES
ZINC COMPOUNDS
400105* -- Separation Procedures
ALCOHOLS
CADMIUM COMPOUNDS
CATIONS
CHARGED PARTICLES
COLLOIDS
DATA
DISPERSIONS
EFFICIENCY
EMULSIONS
EXPERIMENTAL DATA
FLUIDS
GLYCOLS
HYDROXY COMPOUNDS
INFORMATION
IONS
LIQUIDS
MASS TRANSFER
MEMBRANES
MERCURY COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SOLVENTS
POLYETHYLENE GLYCOLS
POLYMERS
SEPARATION PROCESSES
SOLVENT PROPERTIES
SOLVENTS
SUPPORTED LIQUID MEMBRANES
ZINC COMPOUNDS