Isolasi Metil Sinamat dari Minyak Atsiri Laja Gowah (Alpinia malaccensis (Burm.f.))

Abstract

ABSTRAK Telah dilakukan penelitian isolasi metil sinamat dari minyak laja gowah (Alpinia malaccensis (Burm.f.)) dengan metode distilasi menggunakan alat spinning band distillation column. Metil sinamat merupakan senyawa ester dari asam sinamat, dengan rumus molekul C10H10O2. Distilasi dilakukan secara batch pada kondisi tekanan vakum dengan variabel volume distilat dan suhu fraksi distilat. Distilasi batch minyak laja gowah menghasilkan fraksi ringan 25%, fraksi metil sinamat 75%, dan residu 5%. Pada tekanan operasi 40 torr, fraksi metil sinamat dengan kemurnian 98% lebih mudah dihasilkan ketika suhu kolom bagian atas mencapai 115 o C. ABSTRACT In this research has been studied the isolation of methyl cinnamate from laja gowah oil (Alpinia malaccensis (Burm.f.)) using distillation methode by a spinning band distillation column. Methyl cinnamate is ester from cinnamic acid with molecular formula C10H10O2. Distillation has been done in batch system under vacuum with the variables of volume of distillate and temperature of distillate fraction. Distillation batch of laja gowah oil produces 25% of light fractions, 75% of methyl cinnamate fraction, and 5% of residue. At the operating pressure of 40 torr, the fraction of methyl cinnamate with a purity more than 98% was easily obtained at 115 o C of above column.