To enhance the extraction selectivity of vitamin E (VE) from the deodorizer distillate, a biphasic system with solvents of both organic chemical and the salt tetrabutylammonium chloride ([N_4,4,4,4]Cl) was established. The organic solvent was tailored to extract the major component of deodorizer distillate (methyl linoleate), while the organic salt was designed to selectively extract VE by in situ forming a deep eutectic solvent. Three types of organic solvents, namely, ester, arene, and alkane, were analyzed by using the COSMO-RS model, and hexane, exhibiting stronger interaction with methyl linoleate and lower solubility of [N_4,4,4,4]Cl, was screened and its suitability explained from the σ-profile and σ-potential points of view. The biphasic experiments demonstrated that the selectivity of VE by the one-pass extraction process was significantly enhanced by the biphasic system, and the important operation parameters of the dosage of solvent and initial concentration of VE were analyzed.

中文翻译：

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双相系统提高脱臭剂馏分中维生素E的萃取选择性：COSMO-RS和实验研究

为了提高脱臭剂馏出物中维生素E（VE）的萃取选择性，建立了一种有机溶剂和氯化四丁基铵盐（[N _4,4,4,4 ] Cl）的双相体系。定制有机溶剂以提取除臭剂馏出物（亚油酸甲酯）的主要成分，而设计有机盐以通过原位形成深共晶溶剂来选择性提取VE。使用COSMO-RS模型分析了三种类型的有机溶剂，即酯，芳烃和烷烃，而与亚油酸甲酯相互作用更强且[N _4,4,4,4的溶解度较低]的己烷筛选了] Cl，并从σ曲线和σ势的角度解释了其适用性。双相实验表明，双相系统显着提高了单程萃取工艺对VE的选择性，并分析了溶剂用量和VE初始浓度的重要操作参数。