Optimization of ScCO2 Extraction of Rambutan Seed Oil Using Response Surface Methodology

Seed of rambutan as a waste of products from the canned fruit industry and was extracted by supercritical carbon dioxide (ScCO2) using CO2 as a solvent, maceration and soxhlet extraction using ethanol as the solvent. An optimization study of ScCO2 extraction using response surface methodology was performed and 3D response surfaces were plotted from the mathematical models. The optimal conditions based on combination responses were: pressure (X1) at 34.8 MPa, temperature (X2) at 56.7oC, the amount of ethanol (X3) in volume 14.5 ml. These optimum conditions of percent oil yield of 30.38. Therefore, it is considered that the ScCO2 extraction is competitive with conventional extraction as shorter extracting times, high percent oil yield, less organic solvent and eco-environmental friendly. The extracted oil could be used in the cosmetic and food industry.