The process of oil extraction is an essential step for obtaining high quality products and the unconventional methods, such ultrasonic extraction and supercritical fluid extraction, are studied to optimize process in respect to the yield and to minimize temperature and solvents damages on the oil. The use of orange seeds as raw material for the production of oils is applied as an alternative in the disposal of waste from juice processing industry. Due to the different mechanisms to oil extraction from the interior of the seed, the aims proposed are study the effect of ultrasound potency, and evaluated the application of supercritical fluid extraction on seed of orange, and thus to select the method that keep the best characteristics to bioactivity of the extract obtained. The extraction by ultrasound will be performed at the Laboratory of Physical Measurements using ultrasound equipment available in DETA / UNESP, São José do Rio Preto, which will evaluate the effect of different ultrasound potency levels, solvent temperature, and the effect of solvents in the oil orange seed extraction. The solvents will use are hexane, isopropanol and a mixture of 1:1 hexane / isopropanol. For the extraction process using supercritical fluid will be determine the extraction kinetics, and the optimal conditions for both processes in the extraction of oil from orange seed, and the two methods will be compared to extraction efficiency. Finally will determine the bioactivity of each extracts through analysis of free fatty acids, peroxide index, oxidative stability index and antioxidant activity (DPPH).
News published in Agência FAPESP Newsletter about the scholarship: