In this study, the transesterification reaction was performed using choline chloride: metal chloride salts and ionic liquids as the catalyst. The objectives of this study were consisted of synthesis, characterization and catalytic study of the choline chloride type ionic liquids as a catalyst. It was conducted based on four parameters, namely methanol to oil molar ratio, catalyst weight percent, amount of acid in ionic liquids and type of catalyst at 65°C for 4 h. The ionic liquids catalysts were characterized by using H1NMR and FTIR. The optimum condition for the reaction of choline chloride.ZnCl5¯ catalyst with 2.5 wt% catalyst, 20% amount of H2SO4 in ionic liquids which produced 92% of methyl ester. At the same condition, choline chloride.FeCl7¯ catalyst was produced 89.5% of methyl ester. A choline chloride type ionic liquid was cheaper, ease in preparation and separation compared to others without any complex methods. It can be separated by common technique such as freezing and centrifugation. The catalyst can be use until at least four times without any significant loss of products.
W.N.R.W. Isahak, M. Ismail, J. Mohd Jahim, J. Salimon and M.A. Yarmo, 2011. Transesterification of Palm Oil by using Ionic Liquids as a New Potential Catalyst. Trends in Applied Sciences Research, 6: 1055-1062.