DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Supercritical fluid reverse micelle separation

Abstract

A method of separating solute material from a polar fluid in a first polar fluid phase is provided. The method comprises combining a polar fluid, a second fluid that is a gas at standard temperature and pressure and has a critical density, and a surfactant. The solute material is dissolved in the polar fluid to define the first polar fluid phase. The combined polar and second fluids, surfactant, and solute material dissolved in the polar fluid is maintained under near critical or supercritical temperature and pressure conditions such that the density of the second fluid exceeds the critical density thereof. In this way, a reverse micelle system defining a reverse micelle solvent is formed which comprises a continuous phase in the second fluid and a plurality of reverse micelles dispersed in the continuous phase. The solute material is dissolved in the polar fluid and is in chemical equilibrium with the reverse micelles. The first polar fluid phase and the continuous phase are immiscible. The reverse micelles each comprise a dynamic aggregate of surfactant molecules surrounding a core of the polar fluid. The reverse micelle solvent has a polar fluid-to-surfactant molar ratio W, which can vary over a range having amore » maximum ratio W.sub.o that determines the maximum size of the reverse micelles. The maximum ratio W.sub.o of the reverse micelle solvent is then varied, and the solute material from the first polar fluid phase is transported into the reverse micelles in the continuous phase at an extraction efficiency determined by the critical or supercritical conditions.« less

Inventors:
 [1];  [1]
  1. Richland, WA
Issue Date:
Research Org.:
Battelle Memorial Institute, Columbus, OH (United States)
OSTI Identifier:
869041
Patent Number(s):
5266205
Assignee:
Battelle Memorial Institute (Richland, WA)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
supercritical; fluid; reverse; micelle; separation; method; separating; solute; material; polar; phase; provided; comprises; combining; gas; standard; temperature; pressure; critical; density; surfactant; dissolved; define; combined; fluids; maintained; near; conditions; exceeds; defining; solvent; formed; continuous; plurality; micelles; dispersed; chemical; equilibrium; immiscible; comprise; dynamic; aggregate; molecules; surrounding; core; fluid-to-surfactant; molar; ratio; vary; range; maximum; determines; size; varied; transported; extraction; efficiency; determined; supercritical conditions; standard temperature; pressure conditions; polar fluid; fluid phase; molar ratio; critical temperature; method comprises; supercritical fluid; continuous phase; reverse micelle; critical density; near critical; method comprise; comprises combining; surfactant molecule; supercritical temperature; separating solute; chemical equilibrium; extraction efficiency; maximum size; fluid reverse; micelle sol; /210/530/

Citation Formats

Fulton, John L, and Smith, Richard D. Supercritical fluid reverse micelle separation. United States: N. p., 1993. Web.
Fulton, John L, & Smith, Richard D. Supercritical fluid reverse micelle separation. United States.
Fulton, John L, and Smith, Richard D. Fri . "Supercritical fluid reverse micelle separation". United States. https://www.osti.gov/servlets/purl/869041.
@article{osti_869041,
title = {Supercritical fluid reverse micelle separation},
author = {Fulton, John L and Smith, Richard D},
abstractNote = {A method of separating solute material from a polar fluid in a first polar fluid phase is provided. The method comprises combining a polar fluid, a second fluid that is a gas at standard temperature and pressure and has a critical density, and a surfactant. The solute material is dissolved in the polar fluid to define the first polar fluid phase. The combined polar and second fluids, surfactant, and solute material dissolved in the polar fluid is maintained under near critical or supercritical temperature and pressure conditions such that the density of the second fluid exceeds the critical density thereof. In this way, a reverse micelle system defining a reverse micelle solvent is formed which comprises a continuous phase in the second fluid and a plurality of reverse micelles dispersed in the continuous phase. The solute material is dissolved in the polar fluid and is in chemical equilibrium with the reverse micelles. The first polar fluid phase and the continuous phase are immiscible. The reverse micelles each comprise a dynamic aggregate of surfactant molecules surrounding a core of the polar fluid. The reverse micelle solvent has a polar fluid-to-surfactant molar ratio W, which can vary over a range having a maximum ratio W.sub.o that determines the maximum size of the reverse micelles. The maximum ratio W.sub.o of the reverse micelle solvent is then varied, and the solute material from the first polar fluid phase is transported into the reverse micelles in the continuous phase at an extraction efficiency determined by the critical or supercritical conditions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

Works referenced in this record:

Solubilization in surfactant media: the use of an isomerizable solute-probe to determine microheterogeneity in microemulsions
journal, October 1983


Micelles. Physical chemistry of surfactant association
journal, April 1979


Solubilization of Biomolecules in Carbon Dioxide Based Supercritical Fluids
journal, March 1986


Inverse microemulsion polymerization
journal, June 1982


Reversed micellar mobile phases for normal-phase chromatography
journal, April 1986


Enzymes Hosted in Reverse Micelles in Hydrocarbon Solution
journal, June 1985


Inverted micelles and microemulsions in the ternary system water/aerosol-OT/isooctane as studied by photon correlation spectroscopy
journal, February 1979


Reverse micelle supercritical fluid chromatography
journal, August 1987


Organized molecular assemblies in the gas phase: reverse micelles and microemulsions in supercritical fluids
journal, February 1987


Liquid-Liquid Extraction of Low Molecular-Weight Proteins by Selective Solubilization in Reversed Micelles
journal, February 1987


Protein Extraction Using Reverse Micelles
journal, March 1985


Structure of AOT reversed micelles determined by small-angle neutron scattering
journal, September 1985


Physicochemical Principles of Extraction with Supercritical Gases
journal, October 1978


Reverse Micelle Supercritical Fluid Separations
journal, October 1988