Pembuatan Isopropil Palmitat dari Esterifikasi Isopropil Alkohol dan Asam Palmitat pada Perbandingan Rasio Molar dan Berat Enzim Lipase Menggunakan Kekuatan Mikrowave

Abstract

The preparation of isopropyl palmitate (!PP) from palmitic acid and isopropyl alcohol through an esterification reaction under microwave irradiation and catalyzed by enzyme lipase has been studied. The parameters in this study were the molar ratio and the weight of the lipase catalyst. Confirmation of !PP formation was established using spectroscopy FT-IR while the conversion was determined by titration alkalimetry. The maximum !PP conversion of 94,05 ± 0,21 % for parameter ratio molar was obtained at a ratio of 1:2, catalyst weight 20%, reaction time 5 minutes, and microwave power of 20p while for catalyst weight parameter the maximum !PP conversion of97,4 + 0,37 % achieved at 30% catalyst weight, molar ratio of 1:2, 5 minutes reaction time and microwave power of 20p. The formation of the ester group of the !PP is identify by the presence of an ester absorption band at wave number of 1297, 1 cm-1 which shows the C-O-C ester group with a sharp peak and the presence of a vibrational absorption band.