Activities and interaction in the Tri-n-butyl phosphate-water system

Roddy, J.W.; Mrochek, J.E.

doi:10.1016/0022-1902(66)80029-5

Cited by 39 publications

(13 citation statements)

References 11 publications

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“…The density of the pure TBP was measured at a wide range of temperatures, 16−22 while the density of the water−TBP solutions was investigated only at 298.15 K. 1 Data on the density of pure TBP from different sources are contradictory, so it was decided to optimize this value with GLCM binary interaction parameters simultaneously. Results of the measurements of Swain et al 19 and Tian and Liu 20 differ from others largely, thus these values of TBP density were excluded from optimization procedure.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Vapor pressure in the water−TBP system was measured by the isopiestic and isoteniscope methods. [1][2][3][4]16,24,25 The saturated vapor pressure of pure TBP at 298.15 K was measured 29 and found to be more than three orders of magnitude lower than that of water. This difference in the saturated vapor pressure of components allows treating results of the total vapor pressure…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The density of the pure TBP was measured at a wide range of temperatures, − while the density of the water–TBP solutions was investigated only at 298.15 K . Data on the density of pure TBP from different sources are contradictory, so it was decided to optimize this value with GLCM binary interaction parameters simultaneously.…”

Section: Resultsmentioning

confidence: 99%

“…Some efforts on the thermodynamic modeling of the binary system water–tributyl phosphate were made. − Roddy and Mrochek found that solubility of water followed Henry’s law in the narrow concentration range below a H 2 O = 0.75. Water activity at 298.15 K was described using three-term Redlich–Kister model, the model of ideal associated solution, assuming monomers and dimer formation, the model of regular solution expressed in terms of volume fraction .…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Properties and Phase Equilibria in the Water–Tri-n-butyl Phosphate System

Maksimov

Коваленко

2016

J. Chem. Eng. Data

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Tri-n-butyl phosphate (TBP) is widely used as an extractant in many technological processes. A thermodynamic model of the base extraction system water–tributyl phosphate is of great importance for industry. In this work a three-dimensional shape of the liquid phase Gibbs energy surface was modeled for the entire concentration range from pure water to pure TBP at temperatures from 273.15 K to more than 400 K and a pressure of 101325 Pa. Volumetric properties of the water–TBP solutions were measured at 288.15, 298.15, and 323.15 K. To obtain a thermodynamic description of the system of interest a new model of the excess Gibbs energy, the generalized local composition model (GLCM), was developed. Density of solutions, activity of components, enthalpy of mixing, and liquid–liquid equilibria in the water–TBP system were described by the GLCM expression.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Properties and Phase Equilibria in the Water–Tri-n-butyl Phosphate System

Maksimov

Коваленко

2016

J. Chem. Eng. Data

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“…51> 277, 281) Equally, viscosity and density measurements on water saturated esters indicate an interaction in the systems/ 272 ' 276,277,283) but again do not give evidence for the existence of a definite compound. Dielectric constants of water+TBP mixtures show a slight interaction at a mole ratio of 1 : l/ 283 ) In conclusion, IR and NMR spectral data supply direct physical evidence for the formation of a hydrogen bond between the phosphoryl oxygen and the water proton. The energy of the bond, 4-5 kcal/mole, is rather low, close to that of a single water-to-water bond.…”

Section: 274 275 286)mentioning

confidence: 97%