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

• Published in: Journal of chemical and engineering data Vol. 43; no. 5; pp. 811 - 814
• Main Authors: Rubio, Miguel Angel, González, Juan Antonio, García de la Fuente, Isaías, Cobos, José Carlos
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 10-09-1998
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; Liquid-liquid equilibria; Phase equilibria; Hydroxyether; Dodecane; Hydrocarbon; Binary system; Alkane; Phase equilibrium; Liquid liquid equilibrium; Organic compounds; Hexadecane
• ISSN: 0021-9568; 1520-5134
• DOI: 10.1021/je980066y

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.