Supercritical fluid extraction of corn germ oil: Study of the influence of process parameters on the extraction yield and oil quality

Abstract

The supercritical fluid extraction of corn germ oil has been studied in this work.Extractions were carried out at different pressure, temperature and flow rate to analyse the influence of these variables on the extraction kinetics and the oil quality obtained.Extraction curves are initially linear with a slope close to the oil solubility value in supercritical CO 2 . Based on these results a mathematical model was successfully applied to describe the extraction curves. Characterization of supercritical crude corn oil was performed by determining some physical parameters such as refraction index, density and color. Additionally, the fatty acid composition, neutral lipids, the content of tocopherols, acid index, peroxide value, antioxidant capacity and the oxidative stability * Corresponding author 3 were determined in the corn oil extracted. Fatty acid composition was compared with that for crude germ oil and no significant differences between the oils extracted by both methods were found. Oxidative stability test using the Rancimat showed that supercritical CO 2 extracted corn oil is less protected against oxidation than n-hexane extracted oils.

Study of the influence of process parameters on liquid and supercritical CO 2 extraction of oil from rendered materials: Fish meal and oil characterization

“…This value is also of the same order as the crossover pressure usually observed in vegetable oils [22,23]. This fact can be also observed in that LCO 2 can be advantageous when working at low operating pressure, since high solubility of fish oil is obtained at low temperature, due to the mentioned retrograde solubility phenomenon, which is beneficial for capital and operating costs [10].…”

Liquid–Liquid Equilibrium for Ethanolysis Systems of Fish Oil

“…Further details of the gas chromatograph method can be found elsewhere. 15 Table 2 shows the fatty acid composition of the fish oil used in this work.…”

Kinetic Study for the Ethanolysis of Fish Oil Catalyzed by Lipozyme^® 435 in Different Reaction Media

“…The fatty acid profile of the fish oil used in this work and different MAG fractions has been determined by gas chromatography by following the AOAC method 12 . Details of the gas chromatograph method can be found elsewhere 13 .…”