B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
23/363, 134/43
B01J 13/00 (2006.01) A61K 9/107 (2006.01) B01D 11/02 (2006.01) B01F 17/00 (2006.01) B01J 3/00 (2006.01) B01J 10/00 (2006.01) B01J 19/00 (2006.01) C01B 13/32 (2006.01) C01B 33/16 (2006.01) C01F 7/34 (2006.01) C01G 3/02 (2006.01) C01G 5/02 (2006.01) C08F 2/32 (2006.01)
Patent
CA 1337750
The surfactant sodium bis(2-ethylhexyl) sulfosuccinate (AOT) forms reverse micelles and microemulsions using ethane and propane under near critical and supercritical conditions for systems consisting of 80 to 100 percent alkane by weight. Phase diagrams from view cell studies of microemulsion phases formed in supercritical fluids are reported and shown to be strongly dependent on pressure. The properties of these solutions were also characterized by conductivity, density and surfactant solubility measurements. 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 (Wo) increased dramatically in both ethane and propane systems as pressure was increased. At 300 bar and 103°C, the supercritical propane-surfactant system is capable of solubilizing much more water (Wo = 12) than the supercritical ethane-surfactant system (Wo = 4) at 300 bar and 37°C. Some of the important thermodynamic contributions which are likely responsible for this pressure dependent phase behavior are discussed and potential applications of this new class of solvents are considered. Other nonpolar and low polarity fluids in which near critical and supercritical reverse micelle systems can be formed include CO2, N2O, SF6, Xenon, alkenes (ethylene and propylene) and chlorinated or fluorinated hydrocarbons (CF3Cl and CF3H).
583781
Fulton John L.
Smith Richard D.
Battelle Memorial Institute
Oyen Wiggs Green & Mutala Llp
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