Three-dimensional phase diagrams and interfacial tensions of the water—dodecane—pentanol—sodium octylbenzene sulfonate system

Bellocq, A. M.; Bourbon, Dominique; Lemanceau, Bernard

doi:10.1016/0021-9797(81)90093-x

Cited by 41 publications

(7 citation statements)

References 5 publications

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“…γ ow decreases with salinity until reaching a minimum value at optimum salinity (i.e., near HLD = 0). Bellocq et al studied how γ ow , γ om , and γ mw change as a function of the active surfactant concentration for a surfactant–alcohol–oil–brine system, finding behavior similar to that described above except for changes in salinity. Kunieda and Shinoda also found similar behavior for γ ow , γ om , and γ mw as a function of temperature.…”

Section: Introductionmentioning

confidence: 63%

Coupled Interfacial Tension and Phase Behavior Model Based on Micellar Curvatures

Torrealba

Johns

2017

Langmuir

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This article introduces a consistent and robust model that predicts interfacial tensions for all microemulsion Winsor types and overall compositions. The model incorporates film bending arguments and Huh's equation and is coupled to phase behavior so that simultaneous tuning of both interfacial tension (IFT) and phase behavior is possible. The oil-water interfacial tension and characteristic length are shown to be related to each other through the hydrophilic-lipophilic deviation (HLD). The phase behavior is tied to the micelle curvatures, without the need for using the net average curvature (NAC). The interfacial tension model is related to solubilization ratios in order to introduce a coupled interfacial tension-phase behavior model for all phase environments. The approach predicts two- and three-phase interfacial tensions and phase behavior (i.e., tie lines and tie triangles) for changes in composition and HLD input parameters, such as temperature, pressure, surfactant structure, and oil equivalent alkane carbon number. Comparisons to experimental data show excellent fits and predictive capability.

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Section: Introductionmentioning

confidence: 63%

Coupled Interfacial Tension and Phase Behavior Model Based on Micellar Curvatures

Torrealba

Johns

2017

Langmuir

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“…The volume in which three phases are in equilibrium close to the condition R = 1, which is called the three phase body, has a strange shape as illustrated in the lower left part of Fig. 2, and shown in various ways elsewhere [14][15][16], even in quaternary SOWA systems with an alcohol co-surfactant [17]. An outstanding analysis of the body volume of a three liquid phase equilibrium is available elsewhere [18], although the reported quaternary system does not contain any surfactant.…”

Section: Three-phase Behavior Zonementioning

confidence: 99%

“…For ethoxylated nonionics, the scanning variables used most are the temperature and the average ethylene oxide number (EON) in the head group. For any type of surfactant, the ACN has been also used as the scanning variable, although the actual liquid range (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16) for n-alkanes is rather small as far as a physicochemical change is concerned. In effect, it will be shown later that the full experimental range of ACN for liquid n-alkanes (5-16) is, for ethoxylated nonionics, equivalent to a change in about 1.5 EO groups in the polyether head or 30°C in temperature variation, and for anionics to a change in salinity from 1 to 5 wt% NaCl.…”

Section: Empirical Correlations To Attain Optimum Formulationmentioning

confidence: 99%

How to Attain Ultralow Interfacial Tension and Three‐Phase Behavior with Surfactant Formulation for Enhanced Oil Recovery: A Review. Part 1. Optimum Formulation for Simple Surfactant–Oil–Water Ternary Systems

Salager

Forgiarini

Bullón

2013

J Surfact & Detergents

188

234

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Enhanced recovery of crude oil by surfactant flooding requires the attainment of an ultralow interfacial tension. Since Winsor's work in the 1950s it has been known that a minimum interfacial tension and a concomitant three‐phase behavior of a surfactant–oil–water system occurs when the interactions of the surfactant and the oil and water phases are exactly equal. It has been known since the 1970s that these conditions are attained when a linear correlation is satisfied between the formulation variables, which are characteristic parameters of the substances as well as the temperature. This first part of our review on how to attain ultralow interfacial tension for enhanced oil recovery shows how formulation scan techniques using these correlations are used to determine an optimum formulation and to characterize unknown surfactants and oils. The physicochemical significance of the original empirical correlation is reported as the surfactant affinity difference or hydrophilic–lipophilic deviation model. We report the range of accurate validity of, and how to test, this simple model with four variables.

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“…More hydrophilic ones have a very small effect, while more lipophilic ones like n-pentanol or n-hexanol contribute to the hydrophilicity-lipophilicity balance at interface and result in a formulation effect included as the term called f(A) or /(A) in the SAD/HLD equations discussed in Part 1 of this review [1] or equivalent way to take into account the alcohol effect [28,33,37,39,55,[137][138][139][140][141][142]]. This f(A)//(A) term is easy to measure, but it has not been reported with accuracy in the literature for two reasons.…”

Section: Alcohol Effects As Cosurfactantsmentioning

confidence: 99%

How to Attain an Ultralow Interfacial Tension and a Three‐Phase Behavior with a Surfactant Formulation for Enhanced Oil Recovery: A Review. Part 2. Performance Improvement Trends from Winsor's Premise to Currently Proposed Inter‐ and Intra‐Molecular Mixtures

Salager

Forgiarini

Márquez

et al. 2013

J Surfact & Detergents

135

132

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The minimum interfacial tension occurrence along a formulation scan at the so-called optimum formulation is discussed to be related to the interfacial curvature. The attained minimum tension is inversely proportional to the domain size of the bicontinuous microemulsion and to the interfacial layer rigidity, but no accurate prediction is available. The data from a very simple ternary system made of pure products accurately follows the correlation for optimum formulation, and exhibit a linear relationship between the performance index as the logarithm of the minimum tension at optimum, and the formulation variables. This relation is probably too simple when the number of variables is increased as in practical cases. The review of published data for more realistic systems proposed for enhanced oil recovery over the past 30 years indicates a general guidelines following Winsor’s basic studies concerning the surfactant–oil–water interfacial interactions. It is well known that the major performance benefits are achieved by blending amphiphilic species at the interface as intermolecular or intramolecular mixtures, sometimes in extremely complex formulations. The complexity is such that a good knowledge of the possible trends and an experienced practical know-how to avoid trial and error are important for the practitioner in enhanced oil recovery.

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Three-dimensional phase diagrams and interfacial tensions of the water—dodecane—pentanol—sodium octylbenzene sulfonate system

Cited by 41 publications

References 5 publications

Coupled Interfacial Tension and Phase Behavior Model Based on Micellar Curvatures

Coupled Interfacial Tension and Phase Behavior Model Based on Micellar Curvatures

How to Attain Ultralow Interfacial Tension and Three‐Phase Behavior with Surfactant Formulation for Enhanced Oil Recovery: A Review. Part 1. Optimum Formulation for Simple Surfactant–Oil–Water Ternary Systems

How to Attain an Ultralow Interfacial Tension and a Three‐Phase Behavior with a Surfactant Formulation for Enhanced Oil Recovery: A Review. Part 2. Performance Improvement Trends from Winsor's Premise to Currently Proposed Inter‐ and Intra‐Molecular Mixtures

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