A Review on Biodiesel Synthesis Using Catalyzed Transesterification Base Ionic Liquids As Catalyst

onic liquid is a green catalyzer and solvent which can be designed by changing the structure of its cation or anion. Ionic liquid has been used in diverse chemical reactions. Especially, Ionic liquids as environmentally friendly catalysts were applied in biodiesel production. Preparation of biodiesel catalyzed by ionic liquids have many merits, such as no corrosion to equipment, no pollution to environment, and reusability. In this paper, the advances in the base ionic liquids catalysts and their application in biodiesel production were reviewed. The characterization of the ionic liquids were summarized. In addition, the prospect for the application of the basic ionic liquids to catalyze biodiesel production was also stated. Since the cost of ionic liquid may be an issue, there are some challenges to be faced, such as the production of ionic liquids with low cost, easy recovery and with the possibility of reutilization of the catalyst for several cycles.