Nowadays, the production of biodiesel by transesterification is a common process. On the other hand, once the biodiesel is produced, the purification of crude biodiesel to the extent that satisfies international standard norms still presents a significant challenge. One of the biggest challenges is the removal of glycerol. In this paper, the total of seven different deep eutectic solvents (DESs) based on a mixture of choline chloride and ethylene glycol or a mixture of choline chloride and glycerol were prepared and applied for biodiesel purification, using three micro-extractors of different sizes. The obtained results were compared with the results of biodiesel purification by wet washing in the same microextractor type. For the residence time of only 13.61 s, by using a ChCl:Gly_1:2.5 DES, glycerol was almost completely removed from the biodiesel. So, the obtained result clearly justified the application of DESs in micro-extractors for glycerol removal during biodiesel purification.

如今，通过酯交换反应生产生物柴油是一种常见的过程。另一方面，一旦生物柴油生产出来，粗制生物柴油的提纯到满足国际标准规范的程度仍然是一个巨大的挑战。最大的挑战之一是甘油的去除。在本文中，使用三种不同尺寸的微萃取器，总共制备了七种基于氯化胆碱和乙二醇的混合物或氯化胆碱和甘油的混合物的深共晶溶剂，并将其用于生物柴油的纯化。将所得结果与相同微萃取器类型中通过湿洗的生物柴油纯化结果进行比较。通过使用ChCl：Gly _1：2.5，仅停留时间为13.61 sDES，甘油几乎已从生物柴油中完全去除。因此，获得的结果清楚地证明了DES在微萃取器中的应用，以在生物柴油纯化过程中去除甘油。