The effect of using some organic green solvents on quality of oil extracted from soybean seeds

Abstract

The study was conducted to study the effect of using green alternative solvents (limonene and isopropanol) compared to hexane solvent in soybean oil extraction by Soxhlet in the laboratory of Food Science Department of the Faculty of Agriculture, University of Damascus  in 2019. To determine the efficiency of extracting soybean oil using different solvents. Three forms of soybean seeds (fine, coarse and flakes) were used at different temperatures(69، 81 ،175) for each solvent. Performance of solvents were done by a range of analysis were conducted on the extracted oils in terms of physical properties (density, refractive index) and chemical properties (free acidity, peroxide number, number). The results showed that the solvent of limonene and isopropanol significantly excelled  at  (p ≤0.05) compared with  hexane solvent in oil yield which recorded (20.14% for limonene, 18.59% for isopropanol, 15.68% for hexane). Also result showed that peroxide number when using hexane solvent was (4.733 eq / Kg) compared with limonene and isopropanol which were (3.5200 ،4.0500  eq/Kg) respectively.