Isothermal Vapor–Liquid Equilibrium Data for the Binary System 1,1,2,3,3,3-Hexafluoro-1-propene (R1216) + 2,2,3-Trifluoro-3-(trifluoromethyl)oxirane from (268.13 to 308.19) K

Abstract

Isothermal vapor−liquid equilibrium data were measured for the binary system 1,1,2,3,3,3-hexafluoro-1-propene +2,2,3-trifluoro-3-(trifluoromethyl)-oxirane from (268 to 308) K using an apparatus based on the "static-analytic" method. The expanded uncertainties in the measurements were evaluated as 0.05 K, 0.6 kPa, 0.002, and 0.003 for the temperature, pressure, and liquid and vapor mole fractions, respectively. The experimental data were correlated with the Peng− Robinson equation of state using the classical mixing rule and the Mathias− Copeman alpha function. No azeotropes were observed within the temperature and pressure range studied; however, the binary mixture had relative volatilities close to unity, indicating that separation of the mixture via standard distillation is not feasible. a Volume fraction stated by the Nuclear Energy Corporation of South Africa. b Area percentage of component identified by gas chromatography using a thermal conductivity detector (TCD) and a 5% Krytox CarboBlack B column.Article pubs.acs.org/jced

Isothermal Vapor–Liquid Equilibrium Data for the Binary Systems Consisting of 1,1,2,3,3,3-Hexafluoro-1-propene and Either Methylcyclohexane, Cyclohexane, n-Hexane, 2-Methyltetrahydrofuran, or 2,2,3,3,4,4,4-Heptafluoro-1-butanol

“…However, although the phase equilibrium of the binary mixture of HFP and HFPO is zeotropic, the mixture is noted to exhibit unfavorable separation factors. 2 The relative volatility for the binary mixture determined from the isothermal phase equilibrium data between 268.13 and 308.19 K is noted to be below 1.1. 2 At these conditions, conventional distillation may be impractical for the purification of HFPO from HFP.…”

“…2 The relative volatility for the binary mixture determined from the isothermal phase equilibrium data between 268.13 and 308.19 K is noted to be below 1.1. 2 At these conditions, conventional distillation may be impractical for the purification of HFPO from HFP. It has been proposed that one way to overcome this issue is to brominate HFP to change its boiling point and recover the corresponding dibromo compound using zinc powder after distillation.…”

Phase Equilibria for Perfluoroethane + (n-Perfluorohexane or n-Perfluorooctane) Binary Systems: Measurement and Modeling

“…The maximum correlation error from the calibrations was within 2%. The experimental uncertainties in the manuscript were estimated following the guidelines provided by the National Institute of Standards and Technology (NIST); more detail regarding the estimation of the experimental uncertainty can be found elsewhere. − …”

Isothermal phase (vapour+liquid) equilibrium data for binary mixtures of propene (R1270) with either 1,1,2,3,3,3-hexafluoro-1-propene (R1216) or 2,2,3-trifluoro-3-(trifluoromethyl)oxirane in the temperature range of (279 to 318)K

“…Furthermore, we have described in detail the procedures used to estimate the uncertainty with regard to VLE measurements in our previous work [12]. Briefly, the uncertainties are combined were necessary via the law of propagation of errors, which is based on a first-order Taylor series approximation [22].…”

“…This study is part of an on-going research programme investigating the thermodynamic properties of fluorocarbons and their mixtures [1][2][3][4][5][6], and more specifically isothermal phase behaviour for binary mixtures involving either 1,1,2,3,3,3-hexafluoro-1-propene or 2,2,3-trifluoro-3-(trifluoromethyl)oxirane [6][7][8][9][10][11][12]. (Vapour + liquid) equilibrium (VLE) data play an integral part in the design process of numerous unit operations and chemical processes.…”