胺混合物的热力学。由烷基胺与醚、或N,N-二烷基酰胺、或乙腈构成的系统
Thermodynamics of amine mixtures. Systems formed by alkyl-amine and ether, or N,N-dialkylamide, or ethanenitrile
AI总结：
本文利用文献数据和DISQUAC模型研究了烷基胺与环己烷或极性化合物的混合系统，提供了相互作用参数，发现该模型能准确描述超额焓及多相平衡，并优于UNIFAC模型。
摘要：
本文利用文献数据和DISQUAC模型，研究了线性伯胺或仲胺+环己烷，或+极性化合物（即线性或环状单醚、+1,4-二氧六环、+N,N-二烷基酰胺或+乙腈）类型的系统。提供了胺/醚、胺/酰胺和胺/腈接触的相互作用参数。对于给定的接触，QUAC互换系数在每个同系物系列中保持几乎恒定。在以往许多研究中也遇到了类似的趋势。DISQUAC正确描述了所研究混合物的摩尔超额焓 $H_{\ ext{m}}^{\ ext{E}}$ 以及气液平衡和固液平衡，并改进了UNIFAC (Dortmund) 模型对 $H_{\ ext{m}}^{\ ext{E}}$ 的计算。实验数据被用于确定不同分子间的相互作用焓，在含N,N-二烷基酰胺或乙腈的系统中，这种相互作用比在含醚的混合物中更强。另一方面，结果表明，胺 + C$_6$H$_{12}$ 混合物的 $H_{\ ext{m}}^{\ ext{E}}$ 值与胺的自缔合密切相关，并且极性化合物分子间的相互作用对胺 + 固定极性化合物混合物或固定胺 + 极性化合物（非线性单醚）系统的 $H_{\ ext{m}}^{\ ext{E}}$ 结果具有决定性影响。在二正丁胺 + 线性醚系统中，结构效应十分显著。Flory模型的应用表明，在所研究的溶液中取向效应相当弱。这与以往使用ERAS模型对此类混合物的研究结果一致。
英文摘要：
Systems of the type linear primary or secondary amine + cyclohexane, or + polar compound (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, $H_{\text{m}}^{\text{E}}$, and vapour-liquid and solid-liquid equilibria of the studied mixtures and improves calculations on $H_{\text{m}}^{\text{E}}$ 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 $H_{\text{m}}^{\text{E}}$ values of amine + C$_6$H$_{12}$ mixtures are closely related to the amine self-association, and that interactions between molecules of the polar compounds are determinant on $H_{\text{m}}^{\text{E}}$ 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.
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