Liquid + liquid equilibria in 2-methoxyethanol + alkane systems at high pressures

Bijl, Hildo; Loos, Theo W. de; Lichtenthaler, R. N.

doi:10.1016/0378-3812(83)80121-6

Cited by 9 publications

(5 citation statements)

References 6 publications

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“…Dolch et al (1986) have measured LLE for 2-methoxyethanol + heptane or + 2,2,4-trimethylpentane mixtures. LLE of 2-methoxyethanol + alkanes systems at high pressures (in the range 1-400 MPa) have been studied by Bijl et al (1983), but, in both cases, data are presented in graphical form. Nevertheless, Dolch et al (1986) and Francis (1961) report the UCSTs of investigated systems.…”

Section: Resultsmentioning

confidence: 99%

Thermodynamic Properties of N-Alkoxyethanols + Organic Solvent Mixtures. X. Liquid−Liquid Equilibria of Systems Containing 2-Methoxyethanol, 2-(2-Methoxyethoxy)ethanol or 2-(2-Ethoxyethoxy)ethanol, and Selected Alkanes

et al. 1999

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Liquid−liquid equilibria (LLE) data are reported for 2-methoxyethanol + heptane, + methylcyclohexane, or + 2,2,4-trimethylpentane and for 2-(2-methoxyethoxy)ethanol + 2,2,4-trimethylpentane and 2-(2-ethoxyethoxy)ethanol + methylcyclohexane mixtures between 281.8 K and the upper critical solution temperatures (UCSTs). The coexistence curves were determined visually. They have a rather horizontal top and are skewed to the region of higher mole fractions of the alkoxyethanol, x 1, for systems with 2-methoxyethanol, and to the region of lower x 1 values for the mixtures including the other two hydroxyethers. The (x 1, T) data were fitted to the equation T = T c + k|y − y c| m , where y = αx 1/{1 + x 1(α − 1)} and y c = αx 1c/{1 + x 1c(α − 1)}. T c and x 1c are the coordinates of the critical points fitted together with k, m, and α. Results are briefly discussed on the basis of the existence of inter- and intramolecular H-bonds as well as of dipole interactions, which occur in solutions containing hydroxyethers.

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Section: Resultsmentioning

confidence: 99%

Thermodynamic Properties of N-Alkoxyethanols + Organic Solvent Mixtures. X. Liquid−Liquid Equilibria of Systems Containing 2-Methoxyethanol, 2-(2-Methoxyethoxy)ethanol or 2-(2-Ethoxyethoxy)ethanol, and Selected Alkanes

et al. 1999

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“…His value, 313 K, is somewhat lower than the ours, 315.69 K (see below). LLE of 2-methoxyethanol + n-alkanes mixtures at high pressures (in the range 1 to 400 MPa) have been studied by Bijl et al (1983), but all data are presented in graphical way.…”

Section: Resultsmentioning

confidence: 99%

Thermodynamic Properties of n-Alkoxyethanols + Organic Solvent Mixtures. IX. Liquid−Liquid Equilibria of Systems Containing 2-Methoxyethanol or 2-Ethoxyethanol and Selected n-Alkanes

et al. 1998

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Liquid−liquid equilibria (LLE) data are reported for 2-methoxyethanol + dodecane, and for 2-ethoxyethanol + dodecane, + tetradecane, or + hexadecane mixtures between 275.7 K and the upper critical solution temperatures (UCST). The solubility curve of pure solid hexadecane in liquid 2-ethoxyethanol is also presented in the range of 0 to 0.1833 of mole fraction in 2-ethoxyethanol. The coexistence curves were determined visually. For a given alkoxyethanol, the LLE curves are rather asymmetrical, with the asymmetry increasing with the size of the n-alkane. Moreover, the UCSTs increase almost linearly with the number of the carbon atoms of the n-alkane. The (x, T) data were fitted to the equation T = T c + k|y − y c| m , where y = αx/{1 + x(α − 1)} and y c = αx c/{1 + x c(α − 1)}. T c and x c are the coordinates of the critical points fitted together with k, m, and α using a Marquardt algorithm.

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“…18 Also, the phase separation occurs at the composition (w) where the second and third derivatives of DG m with respect to the composition are both equal to zero (q 2 DG m /qw 2 = 0; q 3 DG m /qw 3 = 0) at a given temperature and pressure. 19 The GEs were expected to exhibit a LCST transition because the hydrophilic oligoglycol moieties and the hydrophobic alkyl groups were well balanced in their molecular structure. Notably, modulation of the phase transition temperature is possible because various types of GEs can be synthesised using Williamson ether synthesis to display different oligoglycol and alkyl moieties.…”

Section: Phase Separation Behaviour Of Glycol Ethers (Ges)mentioning

confidence: 99%

Lower critical solution temperature (LCST) phase separation of glycol ethers for forward osmotic control

Nakayama

Mok

Noh

et al. 2014

Phys. Chem. Chem. Phys.

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Lower critical solution temperature (LCST) phase transition of glycol ether (GE)-water mixtures induces an abrupt change in osmotic pressure driven by a mild temperature change. The temperature-controlled osmotic change was applied for the forward osmosis (FO) desalination. Among three GEs evaluated, di(ethylene glycol) n-hexyl ether (DEH) was selected as a potential FO draw solute. A DEH-water mixture with a high osmotic pressure could draw fresh water from a high-salt feed solution such as seawater through a semipermeable membrane at around 10 °C. The water-drawn DEH-water mixture was phase-separated into a water-rich phase and a DEH-rich phase at around 30 °C. The water-rich phase with a much reduced osmotic pressure released water into a low-salt solution, and the DEH-rich phase was recovered into the initial DEH-water mixture. The phase separation behaviour, the residual GE concentration in the water-rich phase, the osmotic pressure of the DEH-water mixture, and the osmotic flux between the DEH-water mixture and salt solutions were carefully analysed for FO desalination. The liquid-liquid phase separation of the GE-water mixture driven by the mild temperature change between 10 °C and 30 °C is very attractive for the development of an ideal draw solute for future practical FO desalination.

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Liquid + liquid equilibria in 2-methoxyethanol + alkane systems at high pressures

Cited by 9 publications

References 6 publications

Thermodynamic Properties of N-Alkoxyethanols + Organic Solvent Mixtures. X. Liquid−Liquid Equilibria of Systems Containing 2-Methoxyethanol, 2-(2-Methoxyethoxy)ethanol or 2-(2-Ethoxyethoxy)ethanol, and Selected Alkanes

Thermodynamic Properties of N-Alkoxyethanols + Organic Solvent Mixtures. X. Liquid−Liquid Equilibria of Systems Containing 2-Methoxyethanol, 2-(2-Methoxyethoxy)ethanol or 2-(2-Ethoxyethoxy)ethanol, and Selected Alkanes

Thermodynamic Properties of n-Alkoxyethanols + Organic Solvent Mixtures. IX. Liquid−Liquid Equilibria of Systems Containing 2-Methoxyethanol or 2-Ethoxyethanol and Selected n-Alkanes

Lower critical solution temperature (LCST) phase separation of glycol ethers for forward osmotic control

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