Phase and Chemical Equilibria of Biphasic Protic Ionic Liquid: Triethylamine–Acetic Acid,Industrial & Engineering Chemistry Research

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Phase and Chemical Equilibria of Biphasic Protic Ionic Liquid: Triethylamine–Acetic Acid
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-09-14 , DOI: 10.1021/acs.iecr.1c02077
Jiao Zhang ₁ , Jia Yao ₁ , Haoran Li _{1,

2}

Affiliation

Triethylamine–acetic acid, as a biphasic protic ionic liquid, typically contains both phase equilibrium and proton-transferring chemical equilibrium, and these equilibria have been measured in this work. NMR and IR spectroscopy methods were applied to determine the neutral and ionic species in both lower and upper phases. At 298.15 K, the lower phase contained (25 ± 1) mol % molecular acetic acid, (10 ± 1) mol % molecular triethylamine, and (64 ± 1) mol % ionic species, while the upper phase contained (4.7 ± 0.2) mol % molecular acetic acid, (71.5 ± 0.5) mol % molecular triethylamine, and (24 ± 1) mol % ionic species. The temperature effect on the distributions of molecular and ionic species in biphasic triethylamine–acetic acid was also studied. The unique biphasic PIL containing both base-rich and acid-rich phases with different ionic concentrations (ionicity) should be of significant potential to be applied in industrial processes.

中文翻译：

双相质子离子液体的相和化学平衡：三乙胺-乙酸

三乙胺-乙酸作为双相质子离子液体，通常同时包含相平衡和质子转移化学平衡，这些平衡已在这项工作中进行了测量。应用核磁共振和红外光谱方法来确定下相和上相中的中性和离子物质。在 298.15 K 时，下层相包含 (25 ± 1) mol% 分子乙酸、(10 ± 1) mol% 分子三乙胺和 (64 ± 1) mol% 离子物质，而上层相包含 (4.7 ± 0.2) mol % 分子乙酸、(71.5 ± 0.5) mol % 分子三乙胺和 (24 ± 1) mol % 离子种类。还研究了温度对双相三乙胺-乙酸中分子和离子物质分布的影响。

更新日期：2021-09-22

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