Isothermal Vapor−Liquid Equilibria at 333.15 K and Excess Molar Volumes at 298.15 K of Ethyl tert-Butyl Ether (ETBE) + Alcoh-1-ol (C₁−C₄) Mixtures

Abstract

Isothermal vapor−liquid equilibria (VLE) were obtained for ethyl tert-butyl ether + n-alcohol (C1−C4) at 333.15 K by headspace gas chromatography, and excess molar volumes were determined from density measurements using a vibrating tube densimeter at 298.15 K. The binary mixtures showed positive deviation from the Raoult's law, and those containing methanol and ethanol have minimum boiling azeotropes. The excess molar volumes of all the binary mixtures were negative. The measured VLE data are well described using a modified UNIFAC equation (Dortmund), and excess molar volumes are correlated with the Redlich−Kister polynomial.

Temperature influence on mixing properties of {ethyl tert-butyl ether (ETBE)+gasoline additives}

“…The root mean square deviations presented were computed using equation (5), where z is the value of the derived magnitude, and n DAT is the number of experimental data: …”

Liquid–liquid equilibria of ternary mixtures of dimethyl carbonate, diphenyl carbonate, phenol and water at 358.15K

“…The uncertainty of the density meter is stated by manufacturer as 5 × 10 −6 g cm −3 in the density range of 0-3 g cm −3 . Temperature was controlled within ±0.01 K. The details of operating procedures have been described elsewhere [7,8].…”

Isothermal vapor–liquid equilibrium at 333.15K and excess molar volumes and refractive indices at 298.15K for the mixtures of di-methyl carbonate, ethanol and 2,2,4-trimethylpentane

“…The HSGC consists of a gas chromatograph (HP 6890N) and a headspace sampler (HP19395A), which has an electro-pneumatic sampling system and a precision thermostat, having an accuracy of ±0.1 K. A HP-5 (30 m × 0.32 mm × 0.25 m) capillary column and a thermal conductivity detector were used for the analysis. The experimental procedure is described in detail elsewhere [3,13]. Densities were measured by a digital vibrating glass tube density meter (Anton Paar, model DMA 5000, Graz, Austria).…”

“…The uncertainty of the density meter is stated as 5 × 10 −6 g cm −3 in the range of 0-3. Temperature is controlled within ±0.01 K in the range from 273.15 K to 363.15 K. The details of operating procedures have been described elsewhere [3,14]. Refractive indices (n D ) of the pure components and mixture samples were measured by digital precision refractometer (KEM, model RA-520N, Kyoto, Japan).…”

“…Recently, environmentally friendly di-methyl carbonate (DMC) is considered as a suitable gasoline additive and ethyl tert-butyl ether (ETBE), tert-amyl methyl ether (TAME) and di-isopropyl ether (DIPE) are also considered as the most possible candidates among ether compounds. We have reported the phase equilibria and mixture properties systematically for several gasoline additive (octane booster) combinations, because the accurate data of such properties are needed for the processing of these compounds [3][4][5].…”