Transesterification double step process for biodiesel preparation and its chromatographic characterization: Oils and fats in practical organic chemistry

摘要

Methanolic transesterification of oils and fats was carried out in a two steps procedure, under basic and acidic catalysis. Palm, soybean, canola, corn, rice, grapeseed, sunflower, peanut, pequi and olive oils, besides tallow and lard were used as feedstock. Specific gravity, relative viscosity, thin layer chromatography and gas chromatography were used to characterize the biodiesel. Biodiesel was obtained in high yield and purity. Results were used to discuss the following key-concepts: 1-triglycerides, composition and properties; 2-nucleophilic acyl substitution under basic and acid conditions, 3-thin layer chromatography, 4-gas chromatography and its quantitative methods.