RT info:eu-repo/semantics/article
T1 Thermodynamics of amine mixtures. Systems formed by alkyl-amine and ether, or N,N-dialkylamide, or ethanenitrile
A1 González López, Juan Antonio Mariano
A1 Hevia de los Mozos, Luis Fernando
A1 García de la Fuente, Isaías Laudelino
A1 Cobos Hernández, José Carlos
A1 Ballerat-Busserolles, Karine
A1 Coulier, Yohann
A1 Coxam, Jean-Yves
K1 Termodinámica
K1 2213 Termodinámica
AB Systems of the type linear primary or secondary amine + cyclohexane, or + polar (namely, linear or cyclic monoether, + 1,4-dioxane, + N,N-dialkylamide, or + ethanitrile) have been investigated using literature data, and by means of DISQUAC. Interaction parameters for the contacts amine/ether, amine/amide and amine/nitrile are provided. For a given contact, the QUAC interchange coefficients remain practically constant along each homologous series. A similar trend has been encountered in other many previous studies. DISQUAC correctly describes excess molar enthalpies, HmE, and vapour-liquid and solid-liquid equilibria of the studied mixtures and improves calculations on HmE from the UNIFAC (Dortmund) model. The experimental data have been used to determine the enthalpy of the interactions between unlike molecules, which are stronger in systems with N,N-dialkylamides or ethanenitrile than in mixtures with ethers. On the other hand, it is shown that HmE values of amine + C6H12 mixtures are closely related to the amine self-association, and that interactions between molecules of the polar compounds are determinant on HmE results of the mixtures amine + fixed polar compound or of the systems fixed amine + polar compound (no linear monoether). Structural effects are relevant in the di-n-butylamine + linear ether systems. The application of the Flory model reveals that orientational effects are rather weak in the investigated solutions. This is in agreement with previous studies on this type of mixtures using the ERAS model.
PB Elsevier
SN 0167-7322
YR 2020
FD 2020
LK https://uvadoc.uva.es/handle/10324/69159
UL https://uvadoc.uva.es/handle/10324/69159
LA spa
NO Journal of Molecular Liquids, 2020, 306, 112907
DS UVaDOC
RD 27-nov-2024