Electrolytic Preparation Of Ionic Liquids And Its Application

Methyl imidazolium ionic liquids, such as [Omim]BF4, [Bmim][CF3SO3][EMIM] BF4, [EMIM][CF3SO3], [BMIM] [HCOO], [BMIM]NO3, [BMIM]BF4 and chiral ionic liquid 1-butyl-3-methylimidazolium L-lactate, were prepared via electrolytic method. Their chemical structures were characterized by Infrared spectroscopy (IR), nuclear magnetic resonance (NMR). The determination of cyclic voltammetry and bromide ion is indicative of high purity via electrolytic synthesis.In this dissertation, the conductivity of these ionic liquids was tested at different temperature and concentration. We optimized the electrolytic preparation parameters, thus obtaining the idea electrolyzer structure, which is composed of cation-exchange membrane, graphite cathode and anode. The current efficiency of electrolysis is dependent upon the concentration of anode and cathode solution. Pilot experiments show that the current efficiency is very critical to the future scale-up production.The application of the resulting ionic liquids was studied. The water-based ionic liquid [Bmim]NO3,1-sulfonic acid butyl-3-methylimidazolium hydrogen sulfate salt was successfully used as Mannich reaction solvent and catalyst, respectively. Mannich products were characterized by NMR as well.