Pembuatan 2-Etilheksil Oleat dari Esterifikasi 2-Etilheksil Alkohol dan Asam Oleat pada Perbandingan Waktu Reaksi dan Daya Mikrowave Menggunakan Katalis Enzim Lipase

Abstract

The production of 2-Ethylhexyl Oleate from oleic acid and 2-Ethylhexyl alcohol has been performed through esterification reaction using lipase enzyme as catalyst and microwave radiation. The parameters studied in this research were reaction time with variations of 0.25, 0.5, 1, 5, 10, 15, and 20 minutes and microwave power with variations of 10%, 20%, 30%, 40% and 50%. Determination of the conversion of 2-Ethylhexyl oleate was established by alkalimetric titration. The confirmation of the production of 2-Ethylhexyl oleate using FT-IR based on the changes in its functional groups. For reaction time parameter, the maximum conversion of 99.02 ± 0.24% was obtained under the conditions of 10 min reaction time, 20% microwave power, 1:3 molar ratio, and 5% catalyst weight. While for the microwave power parameter, the maximum conversion of 97.90 ± 0.42% was achieved using 30% of microwave power, 0.5 minutes reaction time, ratio molar of 1:3 and 5% catalyst weight. %. The formation of ester group of 2-Etilhexyl Oleate was characterized by FT-IR spectrophotometer analysis which showed the presence of -C=O stretching ester absorption band at wave number 1710.56 and supported by -C-O-C- ester stretching vibration at wave number 1036,33 cm-1.