Isobaric Vapor−Liquid Equilibria for 2-Methoxy-2-methylpropane + Ethanol + Octane and Constituent Binary Systems at 101.3 kPa

• Published in: Journal of chemical and engineering data Vol. 44; no. 2; pp. 323 - 327
• Main Authors: Hiaki, Toshihiko, Tatsuhana, Kazuteru, Tsuji, Tomoya, Hongo, Masaru
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 11-03-1999
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; Liquid-vapor equilibria; Phase equilibria; Octane; Ternary system; Ethanol; Ether; Hydrocarbon; Binary system; Liquid vapor equilibrium; Experimental study; Phase equilibrium; Primary alcohol; Non azeotropic mixture
• ISSN: 0021-9568; 1520-5134
• DOI: 10.1021/je980163r

Isobaric vapor−liquid equilibria for 2-methoxy-2-methylpropane (MTBE) + ethanol + octane and for the constituent binary systems MTBE + ethanol and MTBE + octane were measured at 101.3 kPa. The measurements were made in an equilibrium still with circulation of both the vapor and liquid phases. The ternary system of MTBE + ethanol + octane forms a nonazeotrope. The binary system of MTBE (1) + ethanol (2) forms a minimum boiling azeotrope. The azeotropic data are x 1(AZ) = 0.955 mole fraction and T(AZ) = 327.94 K. The experimental data of binary systems were correlated with the nonrandom two-liquid (NRTL) equations. The NRTL equation yielded a good prediction of activity coefficients for the ternary system from the parameters of correlated binary systems.