Phase behavior and interfacial tension studies of surfactant systems

Book · Mon Jan 01 04:00:00 EST 1979

OSTI ID:5591595

Franses, E I

Parallel studies of isomerically pure sodium P(1-heptylnonyl) benzene sulfoante, Texas No. 1, its mixture with sodium dodecyl sulfate (SDS), and the petroleum sulfonate TRS 10-80 were made. Phase behavior in water, in decane, and in water-decane mixtures was studied by spectroturbidimetry, polarizing light microscopy, ultracentrifugation, ultrafiltration, densitometry, conductimetry, low-frequency, 0.2 to 20 kHz, dielectric relaxation, isopiestic vapor pressure, and nuclear magnetic resonance spectroscopy. It was deduced that ultralow tensions (less than 0.01 dyn/cm) arise from the dispersed microcrystallites which form a third, usually liquid crystalline, phase at the decane-brine interfacial region. It appears that neither molecular adsorption from solution for micelles have anything to do with ultralow tensions, which appear to be sensitive to the third phase microstructure. The implications of these results for the mechanism of ultralow tensions in surfactant flooding processes for enhanced petroleum recovery are discussed.

• OSTI ID: 5591595
• Country of Publication: United States
• Language: English

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020300* -- Petroleum-- Drilling & Production
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ELECTRICAL PROPERTIES
ENERGY SOURCES
ENHANCED RECOVERY
ESTERS
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PHASE STUDIES
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RECOVERY
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SODIUM COMPOUNDS
SULFONATES
SULFONIC ACID ESTERS
SURFACE PROPERTIES
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