Densities, Speeds of Sound, Viscosities, and Relative Permittivities for 1-Propanol + and 1-Butanol + Heptane at 298.15 K and 308.15 K

Abstract

The densities, speeds of sound, viscosities, and relative permittivities for the binary mixtures of 1-propanol + and 1-butanol + heptane at 298.15 K and 308.15 K are reported. The excess volumes V E, isentropic compressibilities , viscosity deviations, δη, relative permittivity deviations δε, and molar polarization deviations, δP m were calculated from the experimental results.

A novel pycnometer for density measurements of liquids at elevated temperatures

“…The volumes (calculated from equation (1)) were obtained from experiments using water at the temperatures of (317.90, 376.05, 427.45, and 457.85) K at a pressure of 4.93 MPa. At T ¼ 316:85 K, the volumes for the four pycnometric cells were V ¼ (10.7059, 10.7435, 10.9127, and 10.7423) cm 3 . The cell volumes were found to be nearly linear in temperature with slopes of (DV =DT Þ p ¼ (0.00054, 0.00040, 0.00054, and 0.00055) cm 3 Á K À1 .…”

“…Excess volume against composition is plotted in figure 3. The only data available for excess volumes for butanol and heptane are at low temperatures [3,5,7,8]. We compared our data at T ¼ 316:85 K and 4.93 MPa with the data of Zielkiewicz [7] at T ¼ 313:15 K and ambient pressure.…”

“…There are two general methods of density measurement: pycnometry and dilatometry [1][2][3][4][5][6][7][8]. Pycnometry is used to measure the mass remaining in a known volume after temperature induced overflow.…”

“…Excess volumes for (butanol + heptane) are well described at lower temperatures and pressures [3,5,7,8]. The current work is concerned with the study of excess volume of (butanol + heptane) at a pressure of 4.93 MPa, and temperatures ranging from T ¼ 316:85 K to T ¼ 458:15 K. The pycnometer, the experimental procedure and the results are discussed below.…”

Excess volumes, relative permittivity increments, and excess molar polarizations of { x CH2CCH3CO2CH3+ (1−x) ( C6H6, or C7H8, or o -C8H10, or m -C8H10, or p - C8H10, or C8H10, or c -C6H12)}

“…Thus, the measurements of the thermophysical properties of binary and ternary mixtures involving acrylic esters, hydrocarbons, and 1-alcohols are useful not only in providing vital process parameters for the efficient design of transesterification processes but also for the determination of group interaction parameters for the development of semi-empirical models based on group contribution methods. In an effort to make available thermophysical properties of (acrylic esters + hydrocarbons), our laboratory has reported excess volumes and excess isentropic compressibilities, (1)(2)(3) viscosities, (4,5) and relative permittivity and molar polarizations (6,7) for the acrylic esters of either methyl acrylate, or methylmethacrylate with aliphatic, chlorinated hydrocarbons and 1-alcohols.…”