乙酸乙酯 + 氯仿与离子液体 [EMIM][OAc]、[BMIM][OAc] 和 DMSO + [EMIM][OAc] 作为夹带剂在 101.3 kPa 下的等压汽液平衡,Journal of Chemical & Engineering Data

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乙酸乙酯 + 氯仿与离子液体 [EMIM][OAc]、[BMIM][OAc] 和 DMSO + [EMIM][OAc] 作为夹带剂在 101.3 kPa 下的等压汽液平衡
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2023-01-04 , DOI: 10.1021/acs.jced.2c00625
Pengqi Li _{1,

2} , Xianbao Cui _{1,

2} , Hongen Zhang _{1,

2} , Tianyang Feng ₁ , Huisheng Feng ₁

Affiliation

离子液体 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc])、1-butyl-3-methylimidazolium acetate ([BMIM][OAc])，以及 [EMIM][OAc] 和二甲基亚砜 ( DMSO)作为溶剂分离乙酸乙酯和氯仿的最大沸点共沸混合物。乙酸乙酯+氯仿+[EMIM][OAc]的三元气液平衡（VLE）数据在101.3 kPa下测得。当三元体系中乙酸乙酯和[EMIM][OAc]的浓度较高时，液相部分可溶，采用DMSO提高[EMIM][OAc]在乙酸乙酯中的溶解度。通过在 101.3 kPa 下测量乙酸乙酯 + 氯仿 + DMSO、乙酸乙酯 + 氯仿 + [BMIM][OAc] 和乙酸乙酯 + 氯仿 + [EMIM][OAc] + DMSO 的 VLE 来比较不同夹带剂。所有的夹带剂都能提高乙酸乙酯对氯仿的相对挥发度。ILs [EMIM][OAc] 和 [BMIM][OAc] 的盐析效应明显大于 DMSO。有机溶剂 DMSO 可以在高乙酸乙酯浓度下提高 [EMIM][OAc] 的选择性。通过 sigma-profile 分析夹带剂的影响。采用非随机双液（NRTL）活度系数模型关联实验数据。得到了NRTL方程的二元相互作用参数，相关结果与实验结果吻合较好。通过 sigma-profile 分析夹带剂的影响。采用非随机双液（NRTL）活度系数模型关联实验数据。得到了NRTL方程的二元相互作用参数，相关结果与实验结果吻合较好。通过 sigma-profile 分析夹带剂的影响。采用非随机双液（NRTL）活度系数模型关联实验数据。得到了NRTL方程的二元相互作用参数，相关结果与实验结果吻合较好。

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Isobaric Vapor–Liquid Equilibrium for Ethyl Acetate + Chloroform with Ionic Liquids [EMIM][OAc], [BMIM][OAc], and DMSO + [EMIM][OAc] as Entrainers at 101.3 kPa

Ionic liquid 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc]), 1-butyl-3-methylimidazolium acetate ([BMIM][OAc]), and a mixture of [EMIM][OAc] and dimethyl sulfoxide (DMSO) were used as solvents to separate the maximum boiling azeotropic mixture of ethyl acetate and chloroform. The ternary vapor–liquid equilibrium (VLE) data of ethyl acetate + chloroform + [EMIM][OAc] were measured at 101.3 kPa. The liquid phase is partially soluble when the concentration of ethyl acetate and [EMIM][OAc] is high in the ternary system, and DMSO is employed to enhance the solubility of [EMIM][OAc] in ethyl acetate. Different entrainers were compared by measuring the VLE of ethyl acetate + chloroform + DMSO, ethyl acetate + chloroform + [BMIM][OAc], and ethyl acetate + chloroform + [EMIM][OAc] + DMSO at 101.3 kPa. All of the entrainers can improve the relative volatility of ethyl acetate to chloroform. The salting-out effects of the ILs [EMIM][OAc] and [BMIM][OAc] are significantly greater than that of DMSO. Organic solvent DMSO can enhance the selectivity of [EMIM][OAc] at high ethyl acetate concentration. The effects of the entrainers were analyzed by sigma-profiles. The nonrandom two-liquid (NRTL) activity coefficient model was adopted to correlate the experimental data. The binary interaction parameters of the NRTL equation were obtained, and the correlation results agreed well with experimental results.

更新日期：2023-01-04

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