Viscosity and density data of the system water + n-pentyl acetate + methanol

Giro, Francesca; Gonçalves, Marcella Ferreira; Ferreira, A.G.M.; Fonseca, I.M.A.

doi:10.1016/s0378-3812(02)00262-5

Cited by 42 publications

(7 citation statements)

References 23 publications

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“…Water/methanol mixtures are known to exhibit anomalous thermodynamic properties, such as mixing entropy, viscosity, etc. 26 At the molecular scale the mixing of methanol with water is incomplete, leading to complex solution structures. This is due to the chainlike and ringlike alignment of the methanol molecules surrounding the water molecules.…”

Section: Relaxation In Prepared Gelsmentioning

confidence: 99%

Analysis of coupled mass transfer and sol-gel reaction in a two-phase system

Castelijns

Huinink

Pel

et al. 2006

Journal of Applied Physics

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The coupled mass transfer and chemical reactions of a gel-forming compound in a two-phase system were studied in detail. Tetra-methyl-ortho-silicate ͑TMOS͒ is often used as a precursor in sol-gel chemistry to produce silica gels in aqueous systems. TMOS can also be mixed with many hydrocarbons without chemical reaction, which allows for various applications in multiphase systems. In this study, TMOS was mixed with n-hexadecane and placed together with water in small cylinders. Upon contact of the mixture with the water, TMOS transfers completely to the aqueous phase where it forms a gel through a heterogeneous reaction. Nuclear magnetic resonance imaging and relaxation time measurements were employed to monitor the mass transfer of TMOS from the oleic to the aqueous phase. The longitudinal relaxation time ͑T 1 ͒ was calibrated and used to determine the concentration of TMOS in n-hexadecane during the transfer. The mass transfer rate was obtained at various temperatures ͑25-45°C͒ and for several initial concentrations of TMOS. In the aqueous phase a sharp decrease in the transversal relaxation time ͑T 2 ͒ is observed which is attributed to the gel reaction, in particular the formation of methanol in the initial stage. The minimum in T 2 indicates the gelation point, and was found to be strongly dependent on temperature and concentration.

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Section: Relaxation In Prepared Gelsmentioning

confidence: 99%

Analysis of coupled mass transfer and sol-gel reaction in a two-phase system

Castelijns

Huinink

Pel

et al. 2006

Journal of Applied Physics

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“…The present work is part of a research program which has been developed in our laboratory to provide density, viscosity, and surface and interfacial tensions for water + ester + alcohol at different temperatures [2][3][4][5]. These systems show liquidliquid immiscibility, with the water + alkanoate system practically immiscible over the complete composition range.…”

mentioning

confidence: 99%

Density, Viscosity, and Surface and Interfacial Tensions of Mixtures of Water + n-Butyl Acetate + 1-Propanol at 303.15 K and Atmospheric Pressure

Johnson¹,

Costa

Ferreira

et al. 2008

Int J Thermophys

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Experimental densities, viscosities, and surface and interfacial tensions have been measured at 303.15 K for liquid mixtures of water + n-butyl acetate + 1-propanol. The excess molar volume, V E , viscosity, η, and surface tension, γ , were calculated and rational functions due to Myers and Scott, and Pando et al. were used to describe the composition dependence of these properties. The viscosity, η, of the mixtures was correlated using a theoretically based method developed from the Eyring theory using the above-mentioned rational functions to express the excess Gibbs energy of activation for viscous flow, G =E . The UNIMOD model based on the Eyring theory was used to correlate the viscosity of the binaries and to predict the same property for ternary mixtures. To describe the above-mentioned properties of the ternary system, binary pair additivity and some empirical models were considered. The methods of Fu et al. and Li et al. were used to correlate the binary surface tension and also to predict the ternary behavior. The interfacial tension was correlated by the Li and Fu method.

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“…There is a certain similarity between the excess Gibbs energy of viscous flow G #E and the thermodynamic G E which makes G #E ¼ G E a reasonable assumption [11]. Therefore, G #E can be calculated alternatively by the thermodynamic expression for G E using an equation of state.…”

Section: Theorymentioning

confidence: 99%

“…Lee et al [9] have presented a new viscosity model that estimates the excess activation free energy of flow, G #E in Eyring theory with the aid of Patel and Teja equation of state [10]. Giro et al [11] have used a modified Redich-Kwong-Soave equation on state due to Fuller [12] with the Eyring viscosity model to correlate viscosities of binary mixtures. Also by using the binary interaction parameters they have calculated the viscosity of ternary liquid mixtures.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical studies of viscosities of ternary mixture [2-propanol+ethyl acetate+n-hexane] and its binary constituents at 298.15, 308.15 and 313.15 K

Modarress

Mohsen-Nia

2006

Physics and Chemistry of Liquids

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To cite this article: H. Modarress & M. Mohsen-Nia (2006) Experimental and theoretical studies of viscosities of ternary mixture [2-propanol+ethyl acetate+n-hexane] and its binary constituents at 298.15, 308.15 and 313.Experimental and theoretical studies of viscosities of ternary mixture [2-propanolQethyl acetateQn-hexane] and its binary constituents at 298.15, 308.15 and 313.15 K The viscosities of the ternary mixture [2-propanol þ ethyl acetate þ n-hexane] and its binary constituents; [2-propanol þ ethyl acetate], [2-propanol þ n-hexane] and [ethyl acetate þ n-hexane] were measured over the whole concentration range at three temperatures 298.15, 308.15 and 313.15 K. The M 4 cubic equation of state due to Mohsen-Nia et al. (M. MohsenNia, H. Modarress, G.A. Mansoori. Fluid Phase Equilibria, 206, 27 (2003)) was used along with the modified Eyring kinematic viscosity model to correlate the measured viscosity data and the interaction parameters for the binary mixtures are reported. The binary interaction parameters were successfully used for viscosity calculation of the ternary mixture.

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Viscosity and density data of the system water + n-pentyl acetate + methanol

Cited by 42 publications

References 23 publications

Analysis of coupled mass transfer and sol-gel reaction in a two-phase system

Analysis of coupled mass transfer and sol-gel reaction in a two-phase system

Density, Viscosity, and Surface and Interfacial Tensions of Mixtures of Water + n-Butyl Acetate + 1-Propanol at 303.15 K and Atmospheric Pressure

Experimental and theoretical studies of viscosities of ternary mixture [2-propanol+ethyl acetate+n-hexane] and its binary constituents at 298.15, 308.15 and 313.15 K

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