Synthesis, Characterization and Application of N-Methylpyrrolidinium Bisulfate ([Mpyr][HSO۴]) as an Efficient Acidic Ionic Liquid Catalyst for Triglyceride Oils Interesterification

The process of interesterification is one of the most important alternative ways of hydrogenating oils, which is of particular importance by providing the possibility of changing the functional, physical and chemical properties of oils in a favorable way. In this work, a pyrrolidinium-based acidic ionic liquid, N-methylpyrrolidinium bisulfate ([Mpyr][HSO۴]), was synthesized and characterized, and its catalytic performance was evaluated in the interesterification (glycerolysis) of triglyceride oils. Common analyzing techniques such as Fourier Transfer Infra-red (FTIR) and Nuclear Magnetic Resonance (NMR) techniques were used to catalyst characterization, structure and different bonds evaluation in catalyst structure. The catalytic activity of [Mpyr][ HSO۴] during interesterification process of soy oil as raw material of triglycerides and glycerol reagents was investigated. For evaluation of interesterification procedure, the effects of several important parameters such as reaction time and temperature, molar ratio of oil: glycerol and catalyst dosage were investigated. The results obtain showed that the catalyst of [Mpyr][HSO۴] is suitable for the interesterification (glycerolysis) of triglyceride oils and it has a conversion of about ۹۷.۵%. A simple and accurate titration method was used to evaluate the rate raw materials conversion into ester. Furthermore, in order to reuse the catalyst, the catalyst can be reused up to seven times.

کلیدواژه ها:

Acidic catalyst ، N-methylpyrrolidinium bisulfate ، Interesterification process ، Triglyceride oil