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Neopenthyl glycol dioleate (NPGDO) is a biolubricant base that was formed via esterification process with oleic acid. The presence of oleic acid leads to poor oxidative stability. In this study, epoxidation reaction between NPGDO, formic acid and hydrogen peroxide has been carried out to produce epoxidized NPG dioleate (ENPGDO) which acts as the intermediate of biolubricant. Epoxidized oil can be further modified for better properties. The temperature for this reaction was 40 °C and the molar ratio of NPGDO:formic acid:hydrogen peroxide was 1:3:4. The reaction had taken place for 3 hours. The presence of the epoxy in the product was confirmed through Fourier Transform Infrared (FTIR). The structure of ENPGDO was confirmed using both proton and carbon Nuclear Magnetic Resonance (H-NMR and C-NMR) analysis. The product was found to have 218 (viscosity indeks), 205 °C (flash point), −18 °C (pour point) and 197 °C (oxidative stability). The relative conversion of oxirane (RCO) for ENPGDO was 97.5%.

SYNTHESIS AND CHARACTERIZATION OF EPOXIDIZED NEOPENTHYL GLYCOL DIOLETE AS AN INTERMIDIATE OF BIOLUBRICANT