Evaluation of favela seed oil extraction with alternative solvents and pressurized-liquid ethanol

Santos, Kátia Andressa; Aguiar, Caroline Mariana de; Silva, Edson Antônio da; Silva, Camila da

doi:10.1016/j.supflu.2020.105125

Cited by 25 publications

(16 citation statements)

References 77 publications

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“…The experiments were performed at a constant pressure of 10 MPa. Previous works indicate that pressure is a minor effect variable on removing bio-compounds from plant matrices; thus, the selected pressure needs to ensure that the solvent remains in its liquid state throughout the extraction [19,34,35]. The extraction chamber was filled with approximately 6 g of BSG.…”

Section: Pressurized Liquid Extraction (Ple)mentioning

confidence: 99%

Pressurized liquid extraction of brewer’s spent grain: Kinetics and crude extracts characterization

Herbst

Hamerski

Errico

et al. 2021

Journal of Industrial and Engineering Chemistry

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In this study, extraction yield of valuable compounds from brewer's spent grain (BSG) using pressurized liquid extraction (PLE) was investigated varying temperature, solvent type, and flow rate at a constant pressure. The results were compared with Soxhlet extractions using the total phenolic compounds (TPC), total flavonoid compounds (TFC), antioxidant activity (AA), reducing sugars (RS), and total reducing sugars (TRS) as indices. The highest PLE extraction yield was 20.1 wt%, at 120°C, 2 mL/min using ethanol to water volume ratio of 0.5, at 10 MPa. The TPC, TFC, and AA content were favored by water and water/ethanol extractions and temperature increase. The highest AA was obtained with water at 120 °C and 4 mL/min achieving 9944, 4769 and 4096 µmol TE/100 g of BSG extract, respectively. PLE was capable of present high extraction yields maintaining the RS and TRS in the BSG matrix. In addition, BSG was defatted with compressed propane before the extraction with PLE, showing that 2 compressed propane is highly efficient in recovering the lipid fraction from BSG. The results demonstrated a great potential of water and different EtOH/Water solvent ratio at pressurized conditions for obtaining bio-compounds of BSG in a crude extract with expressive biological activity.

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Section: Pressurized Liquid Extraction (Ple)mentioning

confidence: 99%

Pressurized liquid extraction of brewer’s spent grain: Kinetics and crude extracts characterization

Herbst

Hamerski

Errico

et al. 2021

Journal of Industrial and Engineering Chemistry

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“…The first method evaluated (Santos et al., 2020) was the extraction with supercritical CO 2 , which yielded up to 41 wt% of oil, 8.9 mg of tocopherols per 100 g of seeds, and 51.6 mg of β‐sitosterol per 100 g of seeds. In the second study (Santos et al., 2021), it was found that the oil extracted with ethanol contained a composition of acylglycerols, free fatty acids, and fatty acids similar to that extracted with n ‐hexane. This green solvent was selected for the second nonconventional method, of pressurized liquid extraction, which allowed an oil yield of up to 45.8 wt%, 9.9 mg of tocopherols per 100 g of seeds, and 57.1 mg of β‐sitosterol per 100 g of seeds, with a reduction in the amount of solvent from ~160 g to 58 g and extraction time from 360 min to 19 min when compared to the conventional Soxhlet method.…”

Section: Resultsmentioning

confidence: 98%

“…In addition to replacing the toxic solvents with green solvents, it is important that oil extraction processes are highly efficient with low extraction times and solvent consumption. In a recent study (Santos et al, 2021), the composition of the favela oil extracted by the conventional Soxhlet method with the alternative solvents ethyl acetate, isopropanol, and ethanol was evaluated. From the favorable results obtained with ethanol, in terms of yield, total phenolic content, and antioxidant activity, in addition to the contents of acylglycerols and free fatty acids, this solvent was selected for the nonconventional pressurized liquid extraction method.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound‐assisted extraction of favela ( Cnidoscolus quercifolius ) seed oil using ethanol as a solvent

Santos

Silva

2021

J. Food Process. Preserv.

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In this study, the oil extraction from favela (Cnidoscolus quercifolius) seeds was evaluated using a nonconventional ultrasound‐assisted extraction (UAE) method with ethanol as a solvent. UAE was performed using a 33‐Box–Behnken design to evaluate the effects of the temperature, solvent‐to‐solid ratio, and ultrasound intensity on the yield, concentrations of tocopherols and β‐sitosterol, and the antioxidant activity of the oil. The variable with the greatest influence on yield was the solvent‐to‐solid ratio. The highest yield (46.9 wt%) was obtained after 5 min of extraction at 60°C, 15 ml/g, and 20 W/cm2. Significant variations (p < .05) were observed in the concentrations of total tocopherols (from 20.32 to 34.22 mg per 100 g of oil) and β‐sitosterol (from 98.76 to 162.74 mg per 100 g of oil). The antioxidant capacity, measured by a DPPH assay, had a strong positive correlation with the concentrations of these bioactive compounds. The highest antioxidant capacity found was 7.75 mmol of Trolox per kg of oil. The optimal extraction condition was achieved under 60°C, 15 ml/g, and 28 W/cm2. The yield did not differ (p > .05) from that obtained by the Soxhlet method with ethanol (~50 wt%), and the yields of total tocopherols and β‐sitosterol were 11.0 and 53.4 mg per 100 g of seeds, respectively. The oils with ~76% unsaturated fatty acids were composed of linoleic (~60%), oleic (~15%), palmitic (~16%), and stearic (~7%) acids. Practical applications Seeds from favela (Cnidoscolus quercifolius), a plant from the semi‐arid Brazilian ecosystem, are an interesting source of edible oil that have a high concentration of unsaturated fatty acids, mainly linoleic acid, and have significant concentrations of antioxidant compounds. The ultrasound‐assisted extraction method was promising for the extraction of this vegetable oil, notably with the use of ethanol, a green solvent. This alternative technique provided high yields of oil, tocopherols, and β‐sitosterol with a significant reduction in time and solvent consumption, in addition to lower temperatures, when compared to the conventional Soxhlet method.

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“…Viability of the Solvent. Jatropha oil extraction using hexane has been found to be favorable in this work; however, its characteristics such as flammability, volatility, toxicity, negative impact on environment, operational safety, and possible residues after refining are drawbacks to its application [37][38][39][40][41]. In addition, hexane and petroleum ether are solvents that are derived from petroleum resources that are not renewable.…”

Section: Oil Characterizationmentioning

confidence: 91%

Solvent Extraction of Jatropha Oil for Biodiesel Production: Effects of Solvent-to-Solid Ratio, Particle Size, Type of Solvent, Extraction Time, and Temperature on Oil Yield

Ntalikwa

2021

Journal of Renewable Energy

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The aim of this study was to examine the effects of solvent-to-solid ratio, particle size, extraction time, and temperature on the extraction of Jatropha oil using three organic solvents, i.e., n-hexane, petroleum ether, and ethanol. The Soxhlet extraction method was used, and the parameters were varied in the following ranges: extraction temperature of 24–80°C, extraction time of 2 to 8 h, solvent-to-solid ratio of 4 : 1 to 7 : 1, and particle size of 0.5–0.8 mm. After obtaining optimal conditions, a large volume of Jatropha oil was prepared, purified, and subjected to analysis of quality parameters. It was found that the oil content of the Jatropha curcas L. seeds used was 48.2 ± 0.12% w/w. The highest oil yield of 47.5 ± 0.11% w/w corresponding to an oil recovery of 98.6 ± 0.3% w/w was obtained with n-hexane under the following conditions: solvent-to-solid ratio of 6 : 1, particle size of 0.5–0.8 mm, extraction time of 7 h, and extraction temperature of 68°C. This was followed by that of petroleum ether (46.2 ± 0.15% w/w) and lastly by ethanol (43 ± 0.18% w/w). The quality parameters of the oil extracted compared favorably well with most of the values reported in the literature, suggesting that the oil was of good quality for biodiesel production. Environmental and safety concerns over the use of hexane pose a great challenge. Thus, ethanol, which is environmentally benign, is recommended for application. The conditions for ethanol extraction that gave high oil yield were as follows: extraction temperature of 70°C, extraction time of 7 h, solvent-to-solid ratio of 6 : 1, particle size of 0.5–0.8 mm, and oil yield of 43 ± 0.18% w/w corresponding to an oil recovery of 89.2 ± 0.4% w/w.

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Evaluation of favela seed oil extraction with alternative solvents and pressurized-liquid ethanol

Cited by 25 publications

References 77 publications

Pressurized liquid extraction of brewer’s spent grain: Kinetics and crude extracts characterization

Pressurized liquid extraction of brewer’s spent grain: Kinetics and crude extracts characterization

Ultrasound‐assisted extraction of favela ( Cnidoscolus quercifolius ) seed oil using ethanol as a solvent

Solvent Extraction of Jatropha Oil for Biodiesel Production: Effects of Solvent-to-Solid Ratio, Particle Size, Type of Solvent, Extraction Time, and Temperature on Oil Yield

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