The Phase Behavior of Simple Salt-Tolerant Sulfonates

Barakat, Y.; Fortney, L.; Lalanne-Cassou, Charles; Schechter, R.S.; Wade, William H.; Weerasooriya, Upali; Yiv, Seang

doi:10.2118/10679-pa

Cited by 25 publications

(21 citation statements)

References 15 publications

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“…From extensive previous studies [10,[19][20][21][22][23][24][25][26][27][28][29][30], the following general results are obtained for the extremes in hydrophobe structure.…”

mentioning

confidence: 89%

Optimal Surfactant Structures for Cosurfactant-Free Microemulston Systems I. C₁₆and C₁₄Guerbet Alcohol Hydrophobes

Sunwoo

Wade

1992

Journal of Dispersion Science and Technology

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In most surfactant formulations involving microemulsions, a cosurfactant is generally required in combination with a primary surfactant for several purposes; however, it has previously been shown not to be an absolute requirement and moreover surfactant hydrophobe structure has a profound effect on such requirements.After examining the phase behavior of several industrially feasible surfactants using oil phase composition. temperature, salinity, cosurfactanr concentration, ethylene oxide number (EON). and propylene oxide number (PON) as variables, ethoxylated or propoxylated C'4 Guerbet alcohol sulfates are often found to form cosurfactant-free microemulsion systems with acceptable solubilization parameters (a*) over a wide variety of system conditions. The C t6 Guerbet alcohol sulfates are much more restricted in application, thus often requiring cosurfactant,

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“…From extensive previous studies [10,[19][20][21][22][23][24][25][26][27][28][29][30], the following general results are obtained for the extremes in hydrophobe structure.…”

mentioning

confidence: 89%

Optimal Surfactant Structures for Cosurfactant-Free Microemulston Systems I. C₁₆and C₁₄Guerbet Alcohol Hydrophobes

Sunwoo

Wade

1992

Journal of Dispersion Science and Technology

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“…However, other compounds have been investigated and have shown promising results, e.g. a-olefinsulfonates [16,17] as well as primary and secondary alkanesulfonates (SAS) [18,19].…”

Section: Introductionmentioning

confidence: 99%

Phase behavior of pseudoternary brine/alkane/alcohol-secondary alkanesulfonates systems

Azira

Tazerouti²,

Canselier

2008

J Therm Anal Calorim

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“…Straight-chain sulfonate surfactants have been shown to be superior to branched species in their ability to solubilize large amounts of oil and brine and thus produce lower 1FT's. 11,12 With the straight -chain species, however, it becomes necessary to use medium-chain-Iength alcohols or high temperatures to obtain classic microemulsion phase behavior; i.e., to avoid the formation of liquid crystals. Improved solubilization of oil and brine, and thus lower 1FT's, can be obtained when system alcohol content is reduced.…”

Section: Introductionmentioning

confidence: 99%

Microemulsion to Liquid-Crystal Transition in Two Anionic Surfactant Systems

Hackett

Miller

1988

SPE Reservoir Engineering

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The phase behavior of two anionic surfactant systems, one containing a commercial alpha olefin sulfonate (AOS) and the other containing pure sodium dodecyl sulfate (SDS), was determined in the region where a transition from microemulsion to liquid-crystalline phases occurred with decreasing alcohol content and temperature. A general and rather complex pattern of phase behavior was seen that included a four-phase coexistence region of brine, microemulsion, lamellar liquid crystal, and oil, and two three-phase regions containing both microemulsion and liquid crystal. In much of the four-phase region, complete separation of the phases did not occur even after equilibration for I year or more at constant temperature. Instead, oil and brine were observed to coexist with stable birefringent dispersions that (for some compositions at least) apparently contained three phases: microemulsion, liquid crystal, and oil. Solubilization of brine was uniformly low in the phases making up the dispersions. The dispersions in the SDS system exhibited non-Newtonian behavior with apparent viscosities in the range of 50 to 100 mPa·s [50 to 100 cp] at a shear rate of 10 seconds -I. Microemulsion viscosities in the same system were about an order of magnitude lower. No plugging or other adverse behavior was seen when such dispersions flowed at a velocity of 10 -5 m/s [3 ft/D] through a model porous medium having pore sizes comparable with those in reservoirs. In preliminary experiments, selected dispersions appeared to be capable of displacing oil from the same model porous medium.

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The Phase Behavior of Simple Salt-Tolerant Sulfonates

Cited by 25 publications

References 15 publications

Optimal Surfactant Structures for Cosurfactant-Free Microemulston Systems I. C₁₆and C₁₄Guerbet Alcohol Hydrophobes

Optimal Surfactant Structures for Cosurfactant-Free Microemulston Systems I. C₁₆and C₁₄Guerbet Alcohol Hydrophobes

Phase behavior of pseudoternary brine/alkane/alcohol-secondary alkanesulfonates systems

Microemulsion to Liquid-Crystal Transition in Two Anionic Surfactant Systems

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The Phase Behavior of Simple Salt-Tolerant Sulfonates

Cited by 25 publications

References 15 publications

Optimal Surfactant Structures for Cosurfactant-Free Microemulston Systems I. C16and C14Guerbet Alcohol Hydrophobes

Optimal Surfactant Structures for Cosurfactant-Free Microemulston Systems I. C16and C14Guerbet Alcohol Hydrophobes

Phase behavior of pseudoternary brine/alkane/alcohol-secondary alkanesulfonates systems

Microemulsion to Liquid-Crystal Transition in Two Anionic Surfactant Systems

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Product

Resources

About

Optimal Surfactant Structures for Cosurfactant-Free Microemulston Systems I. C₁₆and C₁₄Guerbet Alcohol Hydrophobes

Optimal Surfactant Structures for Cosurfactant-Free Microemulston Systems I. C₁₆and C₁₄Guerbet Alcohol Hydrophobes