PENGARUH WAKTU REAKSI PADA KONVERSI SITRONELAL DARI MINYAK SEREH WANGI MENJADI ISOPULEGOL MENGUNAKAN KATALIS ZrO2/SiO2

Abstract

Research on the effect of reaction time on conversion citronellal from lemon grass oil into Isopulegol using ZrO2/SiO2 catalyst has been conducted. In this research, the lemon grass oil use was a result of exchange isolation with a 43,09% content. In this research, citronelal separation was carried out by 250 mL of distillation fraksination of citronella oil for 2 hours at a pressure of 10 kpa which produced 3 fractions. The fraction that contains the most citronellal component is the fraction 3 of 63.11% as much 11.3 mL. The citronelal produced was reacted with ZrO2 / SiO2 catalyst which was regenerated using precursor ZrOCl2 which reacted with tetraethylorthosilicate (TOES) and then stirred for 4 hours and calcined at 400 OC. white powder ZrO2 / SiO2 was produced, then characterized by X-Ray Difraction, FTIR, and Gas Sorption Analyzer. Citronellal conversion to isopulegol was carried out by conventional methods (reflux) at a temperature of 80 - 90 OC based on time variations of 0.5, 1, 2 and 3 hours of reaction. The reaction results were analyzed with Chromatoghrapy Gas (GC) and produced isopulegol products which reaction time. At reaction time 0.5 hours produced isopulegol product of 98.28%, reaction time of 1 hour was 98.45%, reaction time of 2 hours produced isopulegol of 98.65% and reaction time of 3 hours was 99.69%.