The dependence of degree of extraction treatment of diesel distillate from the content of preferential solvent - ionic liquid

One of the perspective directions of the employment of ionic liquids is using them as “green” preferential solvent in the process of extraction treatment of undesirable components (aromatic hydrocarbons, sulfur and resin compounds) from the composition of oil fractions. The process of extraction treatment of ionic liquid of various oil distillates may be reviewed as an alternative traditional method of treatment and additional way in the combination of extraction process with other treatment methods allowing combining the advantages of both methods. The paper presents the results of combined process of extraction treatment of hydraulically cleaned diesel fraction using as an extractant of ionic liquids synthesized based on the vinegar acid dipropyl and dibutilamines. It is shown that during step-by-step extraction treatment of ionic liquid of diesel distillate compared to the one-step process, relatively high degree of dearomatization and desulphurization of crude is achieved. In three-phase extraction treatment of diesel distillate with diropilammonium acetate and dibutillamonium acetate with ionic liquids, relatively high extraction capacity diropilammonium acetate of ionic liquids containing more voluminous cation fragment is specified.