KINETIKA REAKSI OKSIDASI MINYAK KULIT BIJI METE DENGAN HIDROGEN PEROKSIDA DAN SINAR ULTRAVIOLET

Abstract

Phenol formaldehyde resin is mainly used as the adhesive in the production of plywood and particle boards. The resin is made by reacting phenol and formaldehyde. Phenol is commonly produced from crude oil, thus an alternative renewable resource of phenol is needed. Cashew nut shell liquid (CNSL) is a promising renewable resource of phenol. In order to be able to be used as the raw material for the production of phenol formaldehyde resin, CNSL needs to be oxidized beforehand. The oxidation is meant to cut the long chain alkyl in the molecular structure of CNSL. The purpose of this research is to study the effects of temperature and ultraviolet light towards the reaction kinetics of CNSL oxidation using hydrogen peroxide. CNSL was reacted with hydrogen peroxide with the mole ratio of 1:30 at 40oC, 45oC, and 50oC temperature. To study the effect of UV light, the reaction was run without any light and with UV irradiation using 1 and 2 10 Watt UV lamps. Sample analysis was performed by method of titration using sodium hydroxide solution as the titrant. The reaction equation of CNSL with hydrogen peroxide was elaborated mechanistically. The kinetics equations was derived using pseudo-steady-state hypothesis. The results showed that the overall reaction rate is controlled by the reduction of CNSL and the reaction rate follows pseudo-first-order kinetics towards CNSL concentration. It was also found that the reaction rate increases proportionally with the increase in UV light intensity for the intensity range of 0 to 0.32 lux