Separation of alkali, alkaline earth and rare earth cations by liquid membranes containing macrocyclic carriers. Fourth progress report, 1 November 1981-31 July 1982
The H/sub 2/O-CHCl/sub 3/-H/sub 2/O liquid membrane system was characterized with respect to the effect on cation (K/sup +/) transport rate of salt concentration and anion type. A bulk liquid membrane cell was used. A mathematical model for cation flux is being developed for several cations, several macrocycles, and mixtures of two or three cations. Eu/sup 3 +/ was not transported by 18-crown-6, but its reduced from Eu/sup 2 +/ was. Cation transport properties of calixarenes are also being investigated. Emulsion membrane systems were studied as a way of increasing the cation transport. Pb/sup 2 +/ was found to be transported by dicyclohexano-18-crown-6 through the liquid membrane. Transport rates of metal cation nitrates were measured in a water-toluene-water emulsion membrane system. 14 figures, 7 tables. (DLC)
- Research Organization:
- Brigham Young Univ., Provo, UT (USA). Thermochemical Inst.
- DOE Contract Number:
- AC02-78ER05016
- OSTI ID:
- 6869745
- Report Number(s):
- DOE/ER/05016-4; ON: DE83001121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALKALI METALS
SEPARATION PROCESSES
ALKALINE EARTH METALS
CATIONS
MEMBRANE TRANSPORT
EUROPIUM
LEAD
POTASSIUM
RARE EARTHS
RESEARCH PROGRAMS
CHLOROFORM
EMULSIONS
HETEROCYCLIC COMPOUNDS
MATHEMATICAL MODELS
MEMBRANES
MIXTURES
POLYCYCLIC AROMATIC HYDROCARBONS
POLYETHYLENE GLYCOLS
REDUCTION
TOLUENE
WATER
ALCOHOLS
AROMATICS
CHARGED PARTICLES
CHEMICAL REACTIONS
CHLORINATED ALIPHATIC HYDROCARBONS
COLLOIDS
DISPERSIONS
ELEMENTS
GLYCOLS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
IONS
METALS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLYMERS
400105* - Separation Procedures