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Liquid–Liquid Equilibrium for Cyclohexane + Benzene + N,N-Dimethylformamide + Potassium Thiocyanate at Temperature 298.15 K and Atmospheric Pressure
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2021-08-06 , DOI: 10.1021/acs.jced.1c00525 Stephanie Lenhare 1 , Beatriz Fernanda Bonfim de Souza 1 , André Zuber 2 , Stênio Cristaldo Heck 3 , Stéphani Caroline Beneti 4 , Andréia Fátima Zanette 5 , Lúcio Cardozo Filho 1, 6
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2021-08-06 , DOI: 10.1021/acs.jced.1c00525 Stephanie Lenhare 1 , Beatriz Fernanda Bonfim de Souza 1 , André Zuber 2 , Stênio Cristaldo Heck 3 , Stéphani Caroline Beneti 4 , Andréia Fátima Zanette 5 , Lúcio Cardozo Filho 1, 6
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The liquid–liquid extraction is an important industrial separation process. It is suitable to separate components with close boiling points when common separation processes such as fractionated distillation are infeasible. The liquid–liquid equilibria of mixtures containing cyclohexane + benzene + N,N-dimethylformamide (DMF) + potassium thiocyanate (KSCN) were analyzed by experimental data obtained at 298.15 K and atmospheric pressure. The obtained experimental data presented good correlation with UNIQUAC and e-NRTL models. The effectiveness of associating KSCN to DMF was analyzed to improve the separation of aromatic and aliphatic hydrocarbons. The liquid–liquid equilibrium selectivity and distribution coefficients were evaluated, considering different KSCN proportions in the solvent. The results demonstrated that the selectivity coefficient increases as the salt mass increases in the mixture. On the other hand, the distribution coefficient decreases as the benzene concentration increases in the raffinate phase.
中文翻译：
环己烷 + 苯 + N,N-二甲基甲酰胺 + 硫氰酸钾在温度 298.15 K 和大气压下的液-液平衡
液-液萃取是一种重要的工业分离过程。当分馏等常用分离工艺不可行时，适合分离沸点相近的组分。含有环己烷 + 苯 + N , N的混合物的液-液平衡-二甲基甲酰胺 (DMF) + 硫氰酸钾 (KSCN) 通过在 298.15 K 和大气压下获得的实验数据进行分析。获得的实验数据与 UNIQUAC 和 e-NRTL 模型具有良好的相关性。分析了将 KSCN 与 DMF 结合以改善芳烃和脂肪烃分离的有效性。考虑到溶剂中不同的 KSCN 比例，对液-液平衡选择性和分配系数进行了评估。结果表明，选择性系数随着混合物中盐质量的增加而增加。另一方面，分配系数随着萃余相中苯浓度的增加而降低。
更新日期：2021-09-09
中文翻译：
环己烷 + 苯 + N,N-二甲基甲酰胺 + 硫氰酸钾在温度 298.15 K 和大气压下的液-液平衡
液-液萃取是一种重要的工业分离过程。当分馏等常用分离工艺不可行时，适合分离沸点相近的组分。含有环己烷 + 苯 + N , N的混合物的液-液平衡-二甲基甲酰胺 (DMF) + 硫氰酸钾 (KSCN) 通过在 298.15 K 和大气压下获得的实验数据进行分析。获得的实验数据与 UNIQUAC 和 e-NRTL 模型具有良好的相关性。分析了将 KSCN 与 DMF 结合以改善芳烃和脂肪烃分离的有效性。考虑到溶剂中不同的 KSCN 比例，对液-液平衡选择性和分配系数进行了评估。结果表明，选择性系数随着混合物中盐质量的增加而增加。另一方面，分配系数随着萃余相中苯浓度的增加而降低。
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