Excess Volumes of Binary Mixtures Containing Diisopropyl Ether + 1-Butanol or Diisopropyl Ether + Diethyl Ketone and Ethanol + Heptane at High Pressures

Abstract

V E is negative for all the mixtures studied over the whole concentration range and for all temperatures. Excess molar volumes V E of ethanol with heptane were measured at 298.15 K and 0.1 MPa, 20 MPa, and 60 MPa. V E is positive in all mixtures studied. Results were correlated by polynomial equations of the type V E) x 1 x 2 ∑ i A i (2x 1 -1) i .

Measurement of densities and excess molar volumes for (1,2-propanediol, or 1,2-butanediol+ water) at the temperatures (288.15, 298.15, and 308.15) K and at the pressures (0.1, 20, 40, and 60) MPa

“…The P3M pressure gauge was connected to an amplifier (model DMS 9824), Burster Gernsbach Präzisionstechnik. The experimental setup was similar to that used in the work of Ulbig et al (7,9) It was improved by using a cryostatic temperature regulator (model Julabo F32-HD) with an accuracy of ±0.01 K for external control of the sample temperature. A further improvement was introduced by implementing valve V 1 , in order to make the sample independent of pressure fluctuations.…”

Thermodynamic and acoustic properties of binary mixtures of alcohols and alkanes. II. Density and heat capacity of (ethanol+n-heptane) under elevated pressures

“…The experimental data sets concerning thermodynamic properties of (ethanol + n-heptane) mixtures under elevated pressures are fragmentary and incomplete. Papaioannou et al [1] and Ulbig et al [2] measured density by vibrating tube densimeters of those mixtures at 298.15 K and at pressures up to 30 MPa, and at 20 and 60 MPa, respectively. Yiling et al [3] reported (p, V m , T) data, obtained from direct measurement, for (ethanol + n-heptane) mixtures investigated at three concentrations at temperatures (323.…”

“…Yiling et al [3] reported (p, V m , T) data, obtained from direct measurement, for (ethanol + n-heptane) mixtures investigated at three concentrations at temperatures (323. 2 An acoustic method based on the measurements of speed of sound as function of temperature and pressure is competitive to direct determination of (p, V m , T). Such properties as density, compressibility, and heat capacity can be calculated from the speed of sound in thermodynamically exact way [4,5].…”

Compressed Liquid Densities of Binary Mixtures of 1-Butanol and Diethylene Glycol Dimethyl Ether from (283 to 363) K at Pressures up to 100 MPa

“…Relative deviations between published density data at elevated pressures and the equation of this work for 1-butanol (data taken from refs , , , and − and from this work).…”

“…In this work, to the best of our knowledge, we surveyed the experimental density measurements of 1-butanol in the literature. Table summarizes the density of 1-butanol performed at high pressure, detailing the methods and temperature and pressure ranges. − A full revision of literature data of the density data of 1-butanol can also be found in Safarov et al The published experimental data before 1994 were reviewed and critically evaluated by Cibulka and Zikova with a Tait equation. Besides, Alaoui et al presented a good comparison with the equation proposed by Cibulka and Zikova .…”