Abstract In this work the ionic liquid tetrabutylammonium dicyanamide ([N4,4,4,4][dca]) was selected as extraction solvent to separate 1-propanol (NPA) and 2-propanol (IPA) from their aqueous solutions. The experimental liquid-liquid equilibrium data for the ternary systems ([N4,4,4,4][dca] + NPA/IPA + H2O) were measured at 303.15, 308.15, 313.15 and 323.15 K and atmospheric pressure. The equilibrium data were correlated by the NRTL model, and the consistency of correlation parameters was checked. Furthermore, the extraction capability of [N4,4,4,4][dca] was evaluated using distribution coefficients and selectivities. These parameters, for the ternary systems studied, increase with decreasing temperature. This study shows that [N4,4,4,4][dca] is a promising solvent for the extraction of NPA and IPA from water.

中文翻译：

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不同温度下四丁基双氰胺+1-丙醇/2-丙醇+水三元体系液-液平衡数据的测量和关联

摘要 在这项工作中，选择离子液体四丁基二氰胺（[N4,4,4,4][dca]）作为萃取溶剂，从水溶液中分离1-丙醇（NPA）和2-丙醇（IPA）。三元系统 ([N4,4,4,4][dca] + NPA/IPA + H2O) 的实验液-液平衡数据是在 303.15、308.15、313.15 和 323.15 K 和大气压下测量的。平衡数据通过NRTL模型关联，并检查关联参数的一致性。此外，[N4,4,4,4][dca] 的提取能力通过分配系数和选择性进行了评估。对于所研究的三元系统，这些参数随着温度的降低而增加。该研究表明，[N4,4,4,4][dca] 是一种很有前途的溶剂，可用于从水中提取 NPA 和 IPA。