Vapor-Liquid Equilibria for 1,1,1-Trifluoro-2-(2,2,2-trifluoroethoxy)ethane +2-Methyl-2-propanol and Pentane+1,1,2,2-tetrafluoro-1-(2,2,2-trifluoroethoxy)ethane System

Toshihiko Hiaki; Shingo Fujita; Tomoya Tsuji; Shingo Urata; Junji Mizukado

Korean Journal of Chemical Engineering, Vol.20, No.5, 902-905, September, 2003

Toshihiko Hiaki^†, Shingo Fujita, Tomoya Tsuji, Shingo Urata¹, and Junji Mizukado²

Department of Applied Molecular Chemistry, Nihon University, 1-2-1 Izumi-cho, Narashino, Chiba 275-8575, Japan
¹Research Center, Asahi Glass Co., Ltd., 1150 Hazawa-cho, Kanagawa-ku, Yokohama 221-8755, Japan
²National Institute of Advanced Industrial Science and Technology (AIST), Research Center for Developing FluorinatedGreenhouse Gas Alternatives, Tsukuba Central 5-2, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan

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Isobaric vapor-liquid equilibrium (VLE) for two binary systems of 1,1,1-Trifluoro-2-(2,2,2-trifluoroethoxy) ethane+2-methyl-2-propanol and pentane+1,1,2,2-tetrafluoro-1-(2,2,2-trifluoroethoxy)ethane system have been measured at 101.3 kPa. The measurements were made in an equilibrium still, developed in a previous study, with circulation of both the vapor and liquid phases. The binary isobaric systems exhibit minimum boiling azeotropes. The thermodynamic consistencies of the experimental data were good by the Van Ness et al. and Herington methods. The experimental data for the binary systems investigated were correlated with activity coefficient equations. The nonrandom two-liquid (NRTL) equation yielded a good correlation of activity coefficients.

Keywords:Hydrofluoroethers;Cleaning Solvents;VLE Data;Azeotrope;Activity Coefficient Equation

[References]

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Herington EFG, J. Inst. Petrol., 37, 457 (1951)
Hiaki T, Kawai A, Fluid Phase Equilib., 158-160, 979 (1999)
Hiaki T, Nanao M, Fluid Phase Equilib., 174(1-2), 81 (2000)
Hiaki T, Nanao M, Urata S, Murata J, Fluid Phase Equilib., 182(1-2), 189 (2001)
Hiaki T, Nanao M, Urata S, Murata J, Fluid Phase Equilib., 194, 969 (2002)
Hiaki T, Tatsuhana K, Tsuji T, Hongo M, J. Chem. Eng. Data, 44, 323 (1999)
Marquardt DW, J. Soc. Indust. Appl. Math., 11, 431 (1963)
Otake K, unpublished paper
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[1] Boublik T, Fried V, Hala E, "The Vapor Pressures of Pure Substances," 2nd ed., Elsevier, Amsterdam (1984)

[2] Herington EFG, J. Inst. Petrol., 37, 457 (1951)

[3] Hiaki T, Kawai A, Fluid Phase Equilib., 158-160, 979 (1999)

[4] Hiaki T, Nanao M, Fluid Phase Equilib., 174(1-2), 81 (2000)

[5] Hiaki T, Nanao M, Urata S, Murata J, Fluid Phase Equilib., 182(1-2), 189 (2001)

[6] Hiaki T, Nanao M, Urata S, Murata J, Fluid Phase Equilib., 194, 969 (2002)

[7] Hiaki T, Tatsuhana K, Tsuji T, Hongo M, J. Chem. Eng. Data, 44, 323 (1999)

[8] Marquardt DW, J. Soc. Indust. Appl. Math., 11, 431 (1963)

[9] Otake K, unpublished paper

[10] Renon H, Prausnitz JM, AIChE J., 14, 135 (1968)

[11] Riddick JA, Bunger WB, Sakano TK, "Organic Solvents Physical Properties and Methods of Purification," 4th ed. John Wiley & Sons, New York (1986)

[12] VanNess HC, Byer SM, Gibbs RE, AIChE J., 19, 238 (1973)