The effect of water on the solidification points of fatty acids. Solubility of water in fatty acids

Hoerr, C. W.; Pool, W. O.; Ralston, A. W.

doi:10.1007/bf02545490

Cited by 29 publications

(23 citation statements)

References 6 publications

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“…Close to the saturation pressure the uptake is about 0.23 on a mole ratio basis. This seems to be in reasonable agreement with studies of water solubility into liquid stearic acid C18H3602, in which a water content of 0.15 on a mole ratio basis was determined (Hanahan, 1986;Hoerr et al, 1942).…”

Section: Response Of Lbfilms To Water Vaporsupporting

confidence: 56%

Transport properties of water and pentane in Langmuir–Blodgett films

1996

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Section: Response Of Lbfilms To Water Vaporsupporting

confidence: 56%

Transport properties of water and pentane in Langmuir–Blodgett films

1996

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“…As detailed in Hoerr et al (), Kaneshina et al (), and La Mesa () and presented in Fig. , forward CMC, reverse CMC, and directional solubility are strongly influenced by a combination of temperature ( T ), pressure ( P ), and surfactant molecular structure ( M ) ( C CMC = f ( T , P , M ) and S D = f ( T , P , M )).…”

Section: Introductionmentioning

confidence: 86%

“…Due to the inverted nature of a forward micelle, compared to a reverse micelle, it is expected that the forward CMC is inversely proportional to a reverse CMC (C FCMC / 1 C RCMC ). As detailed in Hoerr et al (1942), Kaneshina et al (1974), and La Mesa (1990) and presented in Fig. 1, forward CMC, reverse CMC, and directional solubility are strongly influenced by a combination of temperature (T), pressure (P), and surfactant molecular structure (M) (C CMC = f(T, P, M) and S D = f(T, P, M)).…”

Section: Surfactant Chemistry In Terms Of Pressure and Temperaturementioning

confidence: 94%

A Generalized Theoretical Model for the Relationship Between Critical Micelle Concentrations, Pressure, and Temperature for Surfactants

Thiruvengadam

Murphy

Tan³

et al. 2019

J Surfact & Detergents

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Directional solvent extraction (DSE) has been gaining interest as a water treatment technology in recent years. DSE utilizes the process of micellization for the purposes of species separation between water and complex chemical systems. In this article, we develop a conformal geometric algebra‐based formulation that models surfactants, their solubilities, and critical micelle concentration (CMC), with relation to temperature and pressure. Molecules are represented as spatially distributed networks embedded in R4,1 space, and the mathematical characterizations of these molecules are shown to be effective in modelling CMC as a function of temperature and pressure. One of the contributions of this work is the utilization of this formulation to develop a governing expression, in the form of a three‐dimensional relationship, between CMC, pressure, and temperature for a general surfactant. In prior works, the CMC–temperature plane and CMC–pressure plane expressions have been extensively documented for sodium alkyl sulfates. In this work, we extend the formulation to model the CMC of decanoic acid, sodium octyl sulfate, sodium decyl sulfate, sodium dodecyl sulfate, and sodium tetradecyl sulfate. Using this theoretical model, a relationship between CMC and the directional solubility of water in a surfactant is determined. Directional solubility is related to temperature and pressure, and on this basis, we devise a directional solubility–pressure–temperature expression for an arbitrary surfactant to improve the state of the art for DSE. From this expression, we propose a novel isothermal DSE process for water treatment.

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“…This value is comparable to the experimental value of 2%, 22 and the estimation of 2.4% based on Hoerr's data. 37 As an order of magnitude estimation of the water diffusion constant (D) in decanoic acid, we fit the curve in Fig. 4(b) to one-dimensional Fick's law and found D $ 0.05 Â 10 À5 cm 2 =s.…”

Section: A Diffusion At a Water-decanoic Acid Interfacementioning

confidence: 99%

Directional solvent for membrane-free water desalination—A molecular level study

Luo

Bajpayee

Chen

2011

Journal of Applied Physics

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Development of desalination technologies has been identified as vital to fulfilling future water demand. In this paper, we use molecular simulation to demonstrate that decanoic acid can dissolve water but reject salt, and itself is insoluble in water. We have recently demonstrated that the directional properties of decanoic acid together with the temperature dependence of water solubility in decanoic acid can be utilized to design a desalination process which extracts water molecules, using the decanoic acid as a directional solvent, from saline source at a higher-than-ambient temperature, and precipitate out the water from the solvent at a lower temperature to recover pure water. Such a desalination process is membrane-free and can make use of low temperature heat sources. Solubility properties between water and decanoic acid are characterized through free energy calculations, and water-decanoic acid interdiffusion processes are studied by molecular dynamics simulations. This work also exemplifies an approach to characterize other possible directional solvents. V

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The effect of water on the solidification points of fatty acids. Solubility of water in fatty acids

Cited by 29 publications

References 6 publications

Transport properties of water and pentane in Langmuir–Blodgett films

Transport properties of water and pentane in Langmuir–Blodgett films

A Generalized Theoretical Model for the Relationship Between Critical Micelle Concentrations, Pressure, and Temperature for Surfactants

Directional solvent for membrane-free water desalination—A molecular level study

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