Synthesis, Evaluation of asymmetric dicationic Ionic Liquids and studying their efficiency for Egyptian Base Oil improvement

Bidak, Sameh M.; Nessim, Maher I; El-Dossoki, Farid I.; Ismail, Dina A.; Mohammed, Hoda A.; El-Bassoussi, Ali A. M.

doi:10.21608/ejchem.2022.146789.6377

Synthesis, Evaluation of asymmetric dicationic Ionic Liquids and studying their efficiency for Egyptian Base Oil improvement

Document Type : Original Article

Authors

¹ Laboratories Department, United Gas Derivative Company, Port Said, Egypt.

² Analysis and evaluation Department, Egyptian Petroleum Research Institute, Cairo, Egypt

³ Chemistry Department, Faculty of Science, Port Said University, Port Said, Egypt

⁴ Petrochemical Department, Egyptian Petroleum Research Institute, Cairo, Egypt

10.21608/ejchem.2022.146789.6377

Abstract

In this work, three asymmetric dicationic ionic liquids, namely, 1-(2-(1-decyl-1H-imidazolium-3-yl)ethyl)-4-methylpyridinium bromide (IL101), 1-(5-(1-decyl-1H-imidazolium-3-yl)pentyl)-4-methylpyridinium bromide (IL102), and 1-(10-(1-decyl-1H-imidazolium-3-yl)decyl)-4-methyl-pyridinium bromide (IL103) were synthesized. Their structures were confirmed and characterized via, elemental analysis, Fourier transform infra-red spectroscopy and proton nuclear magnetic resonance. The surface properties of these ionic liquids, surface tension, critical micelle concentration, effectiveness, maximum surface excess, and minimum surface area, were investigated with different concentrations at 25°C. Standard free energies of micellization and adsorption were obtained. They were studied and tested as base oil improvers, especially oxidation stability, (through studying the change in total acid number [TAN] and viscosity), and foaming characteristics. The efficiency of these compounds as base oil improvers is ranked as follows, IL103 > IL102 > IL101.

Keywords