Heats of mixing of butyl amine-water and butyl amine-alcohol systems

Abstract

The heats of mixing for binary mixtures of n-butyl amine with water, methyl alcohol, ethyl alcohol, n-propyl alcohol, and n-butyl alcohol at 40.00 ± 0.01 °C determined in a twin-type calorimeter can be fitted in an equation of the form AHmwhere x2 is the mole fraction of n-butyl amine; Xi is the mole fraction of the second component; B, C, and D are constants. The mixing is accompanied by evolution of heat, and the exothermic effect follows the order CH3OH > H20 > C2H5OH > n-C3H7OH > n-C4H9OH.As part of our program of research to investigate the effect of a gradual change in the size and shape of the substituent hydrocarbon group on the thermodynamic properties of a mixture of highly polar liquids, we present the results of studies on the heats of mixing of n-butyl amine with water, methyl alcohol, ethyl alcohol, n-propyl alcohol, and n-butyl alcohol.

Excess molar volumes and densities of (methanol+water) at temperatures between 323 K and 573 K and pressures of 7.0 MPa and 13.5 MPa

“…Densities r and excess molar volumes V E m for this system are available at ambient conditions, (1)(2)(3) and some data at T Q 348 K and pressures up to 350 MPa have been reported. (4)(5)(6)(7) Other thermodynamic properties, such as excess molar heat capacity and excess molar enthalpy, are known only at temperatures near T = 298.15 K. (8)(9)(10) Pressure-dependent excess molar enthalpies of (methanol + water) have been reported by Simonson et al (11) at temperatures up to 573 K, from which V E m can be derived. The only other measurements for (methanol + water) at temperatures above 348 K that have been reported are the critical temperatures, (12,13) one point a Visiting Scientist, May to September 1994.…”

Excess molar volumes and excess viscosities of n-butylamine + 1,4-dioxane + carbon tetrachloride system at 298.15 K

“…[8], [lo], [13], [14], [16], and [19] Table 5 shows the standard deviations for the excess volumes and viscosities calculated by using some of the equations previously mentioned for a ternary system. Equation [16] shows the best agreement with the experimental data.…”

“…Only eqs. [16] and [19] contain three adjustable parameters while the others include only experimental data for the corresponding binary mixtures. There is no preferred way of knowing which method will provide the best prediction for a given system.…”

Equilibrium and Transport Properties of Primary, Secondary and Tertiary Amines by Molecular Simulation

“…If this property is not well predicted then the Henry constants will probably also be incorrect or unreliable because the interactions in the solvent are poorly described. Figure 5 shows a comparison between our excess enthalpy predictions and the experimental information [43][44][45] taken from the DETHERM database [46] for the n-ButylAmine + water system. It is worth pointing out that differences between experimental values can be found.…”

“…n-ButylAmine + water. Black circles correspond to the simulation results, while other symbols are experimental values [43][44][45]. The dashed line is just a guide for the eye.…”