Interfacial chemistry in solvent extraction systems: Progress report for period April 1, 1985-March 31, 1988
Interfacial behavior of extractant molecules and their interaction with metal ions has been investigated. Consideration was also given to the question of microscopic interfaces, i.e., those associated with reversed micelles as well as microemulsions. NMR spectroscopy, fluorescence spectroscopy, quasi-elastic light scattering, vapor pressure osmometry, and Karl-Fischer titrimetry provided support for findings obtained from interfacial tension experiments that reversed micelles are formed, under certain conditions, in the system di(2-ethylhexyl)phosphoric acid (HDEHP)/ n-hexane/CaCl/sub 2/ solution. These techniques were further extended to include different organophosphorus acids (PC 88A and CYANEX 272), diluent (benzene), and metal ions (Co/sup 2 +/, Ni/sup 2 +/, and Zn/sup 2 +/) to determine whether reversed micellization occurs in solvent extraction systems which employ organophosphorus acids. A preliminary general model of the aggregation mechanism for metal-extractant complexes has been proposed. Also various laser techniques have been used to investigate the structure and dynamics of extractant films. A laser fluorescence apparatus for probing interfacial dynamics is under construction. 64 refs., 29 figs.
- Research Organization:
- Auburn Univ., AL (USA). Dept. of Chemical Engineering
- DOE Contract Number:
- FG05-85ER13357
- OSTI ID:
- 5737849
- Report Number(s):
- DOE/ER/13357-10; ON: DE88004095
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Interfacial chemistry in solvent extraction systems. Progress report, April 1, 1985-March 31, 1986
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COBALT
SOLVENT EXTRACTION
INTERFACES
SURFACE TENSION
MICELLAR SYSTEMS
SYNTHESIS
NICKEL
ZINC
AGGLOMERATION
BENZENE
CALCIUM
CALCIUM CHLORIDES
CRYSTAL GROWTH
DESIGN
FLUORESCENCE
HDEHP
HEXANE
KINETICS
LASERS
LIQUIDS
MEASURING INSTRUMENTS
MICROSTRUCTURE
ORGANIC ACIDS
ORGANIC PHOSPHORUS COMPOUNDS
PH VALUE
PROGRESS REPORT
RHODAMINES
SOLVENT PROPERTIES
SOLVENTS
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
ALKANES
AMINES
AROMATICS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CARBOXYLIC ACIDS
CHLORIDES
CHLORINE COMPOUNDS
CRYSTAL STRUCTURE
DOCUMENT TYPES
DYES
ELEMENTS
ESTERS
EXTRACTION
FLUIDS
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
LUMINESCENCE
METALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHOSPHORIC ACID ESTERS
REAGENTS
SEPARATION PROCESSES
SURFACE PROPERTIES
TRANSITION ELEMENTS
400105* - Separation Procedures