Synthesis research on soybean oil isopropyl ester

Synthesis of soybean oil isopropyl ester by transesterification with alkaline catalyst was studied.Research on the effect of alcohol to oil ratio(mol),alkali catalyst concentration,reaction temperature and reaction time to the transesterification.The results showed that synthesis of soybean oil isopropyl ester the optimal conditions were as follows:alcohol to oil ratio 10∶ 1(mol),alkali catalyst concentration 2.0%,reaction temperature 80 ℃,reaction time 60 min.Under these conditions,the yield of soybean oil isopropyl ester was up to 53.07%.At last,through the comparison of the synthesis of soybean oil methyl,ethyl and isopropyl esters,the reaction law of transesterification with different alcohol and soybean oil was gained.The characterization of chromatography showed that after transesterification,the feed oil had successfully transformed into biodiesel.