Reverse micelle supercritical fluid separations

Conference · Sat Oct 01 04:00:00 EDT 1988 · Sep. Sci. Technol.; (United States)

OSTI ID:6189769

Smith, R D; Fulton, J L; Jones, H K

Initial results are presented showing the potential applications of reverse micelle supercritical fluid solvents in separation processes. The formation of reverse micelles in subcritical n-alkane continuous phases is described. Phase diagrams obtained from view-cell studies of micellar and microemulsion phases formed in supercritical fluids are reported and shown to be strongly dependent on pressure. The solubility of AOT in ethane and propane over a range of pressures shows behavior typical of solids in supercritical fluids. The maximum water-to-surfactant ratio (W/sub o/) increased dramatically in both ethane and propane systems as pressure was increased. At 300 bar W/sub o/ = 4 for ethane at 37/degrees/C and W/sub o/ = 12 for propane at 103/degrees/C. The initial use of supercritical fluids containing reverse micelles for the extraction of solutes from an aqueous phase, and as mobile phases in chromatography, is described.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6189769
• 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

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
400201 -- Chemical & Physicochemical Properties
ALKANES
AQUEOUS SOLUTIONS
CHROMATOGRAPHY
COLLOIDS
DATA
DIAGRAMS
DISPERSIONS
EMULSIONS
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
MICELLAR SYSTEMS
MICROEMULSIONS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PRESSURE DEPENDENCE
SEPARATION PROCESSES
SOLUTIONS
SOLVENT PROPERTIES
SOLVENTS
SUPERCRITICAL FLUID CHROMATOGRAPHY
SUPERCRITICAL STATE
SURFACTANTS
USES
WATER