Abstract
•Four novel pyrrolidinium-based amino acid ionic liquids (AAILs) were synthesized.•The physicochemical properties of these AAILs were investigated.•AAILs were used as a green chemistry approach for the deacidification of crude oil.•Extremely small amounts of ILs are sufficient to deacidify highly acidic crude oil.•Antimicrobial activity assay was performed to study its effect on aquatic system.
Four novel pyrrolidinium-based amino acid ionic liquids were synthesized and characterized. The physicochemical properties of these amino acid ionic liquids (AAILs), such as viscosity, density, thermal stability, and surface tension were investigated. These ionic liquids (ILs) were used as a green chemistry approach for the extraction of naphthenic acid from the model oil. The influence of amino acid anions on the de-acidification process was assessed by attaching prolinate, glycinate, alaninate and serinate. Extraction results show that very small amounts of ILs are sufficient to extract naphthenic acid from a model oil configuration with a high total acid number. The regeneration and reusability of the synthesized ILs have also been analysed in this work. Moreover, the antimicrobial activity assay was performed to ascertain the potential toxicological effect of the synthesized set on the aquatic system.