At 55 ◦C, the extraction yield was about 2% higher for all extractions when compared to the total oil obtained by the conventional Soxhlet (petroleum ether). This confirms that the use of ethanol causes other components to be extracted, besides those soluble in petroleum ether or n-hexane. Similar results were obtained by Arnold and Choudhury (1962) in the extraction of soybean oil with ethanol at different levels of hydration. These authors found that for higher levels of ethanol hydration fewer amounts of oil were extracted and larger amounts of non-lipid components as well. Kwiatkowski and Cheryan (2002) performed the extraction of corn oil with anhydrous ethanol in three stages. As the extraction took place, the water was straightly removed from the corn and mixed with ethanol in the successive stages. Therefore, the oil extraction capability of the solvent decreased, while the extraction of non-lipid compounds increased.