Extraction and Modelling of Oil from <i>Eucalyptus camadulensis by</i> Organic Solvent

Abstract

This work was conducted to study the extraction of eucalyptus oil from natural plants (Eucalyptus camadulensis leaves) by organic solvents. the effects of the main operating parameters were studied; type of solvent (n-hexane and ethanol), time to reach equilibrium, the temperature (45˚C to 65˚C) for n-hexane and (45˚C to 75˚C) for ethanol, solvent to solid ratio (5:1 to 8:1 (v/w)), agitation speed (0 to 900 rpm) and the particle size (0.5 to 2.5 cm) of fresh leaves to find the best processing conditions for the achieving maximum oil yield. The concentration of eucalyptus oil in solvent was measured by using UV-spectrophotometer. The results (for n-hexane) showed that the agitation speed of 900 rpm, temperature 65˚C with solvent to solid ratio 7:1 (v/w) of particle size 0.5 cm for 210 minute give the highest value of oil (68.5 wt%). Similar conditions for ethanol with the exception of the temperature (75˚C) give the highest yield of oil (65.07 wt%).

Response surface methodology optimization of oil extraction from oil palm meal (OPM) with hydrous ethanol and its pilot-scale application with recirculation of extraction solvent

“…The interaction of these two independent variables is also of importance. This condition is consistent with the report by Abed et al (2015). They reported that the speed of stirrer improved mass transfer and eddy diffusion in the solvent at the particle surfaces.…”

“…They reported that the speed of stirrer improved mass transfer and eddy diffusion in the solvent at the particle surfaces. Moreover, increasing the ratio of solvent-to-solid will increase the oil yield, up to some limit, because the concentration gradient in liquid phase increases as dissolved substances are diluted, and this favors good mass transfer (Abed et al, 2015). Fig.…”

Kinetics and Thermodynamics of Peppermint Oil Extraction from Peppermint Leaves

“…When t approaches 0 the initial extraction rate, hi, as , can be written as equation (6): (6) At any time, the concentration of peppermint oil can be expressed as:…”

“…Essential oils are generally colorless to slightly yellowish and only slightly soluble in water and dissolve fairly well in an organic solvent and mix very well with vegetable oils and fats. Many essential oils have antibacterial, anti-fungal, and antiparasitic properties [5], [6].…”

Extraction of Ocimum basillicum Oil by Solvents Methods

“…Examples of these solvent are benzene, hexane, acetone, petroleum ether, ethyl alcohol, etc. [3][4][5][6][7]. The industrial application of solvent extraction method is increasing day by day because of their direct application to a wide range of raw materials with low oil content [8][9][10].…”