Pressurized liquid extraction and chemical characterization of safflower oil: A comparison between methods

Conte, Rogério; Gullich, Letícia M.D.; Bilibio, Denise; Zanella, Odivan; Bender, João Paulo; Carniel, Naira; Priamo, Wagner Luiz

doi:10.1016/j.foodchem.2016.06.111

Cited by 53 publications

(29 citation statements)

References 30 publications

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“…This is consistent with the results obtained by Conte et al in the extraction of safflower seed oil using ethanol under pressurized conditions. The authors reported yields of 12.21 % and 11.21 % at 10 and 20 MPa, respectively.…”

Section: Resultssupporting

confidence: 93%

“…For a flow rate of 1 mL/min, the extraction rate is lower due to greater solvent penetration into the particles of the vegetable matrix, because the solvent stays for a longer time in contact with the solid, demonstrating the effect of internal diffusion. Conte et al conducted the extraction of safflower oil at 30 °C under pressurized conditions and obtained yields of 9.29 % and 17.62 % at 10 MPa and 10.27 % and 16.58 % at 20 MPa, using solvent flow rates of 1 and 3 mL/min, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The disadvantages of n ‐hexane have encouraged researchers to study the efficiency of other solvents. In this regard, the solvents most commonly cited are water, with or without enzyme addition, supercritical carbon dioxide, subcritical propane, and short chain alcohols, particularly ethanol …”

Section: Introductionmentioning

confidence: 99%

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Pressurized liquid extraction of oil from soybean seeds

2017

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The aim of this study was to investigate the extraction of soybean oil using ethanol under pressurized conditions. The effects of pressure (10 and 20 MPa), temperature (30 to 90 °C), and solvent flow (1 and 3 mL/min) were evaluated applying different extraction times. In addition, the thermodynamics parameters of the process were determined. It was observed that the pressure exerted no influence on the extraction kinetics, while an increase in temperature promoted better yields. The use of the highest solvent flow increased the initial extraction rate, but did not influence the yield under equilibrium conditions. Based on the thermodynamic parameters, the extraction was classified as endothermic (44.11 kJ/mol), irreversible (143.52 J/mol K), and partially spontaneous (0.60 to −8.01 kJ/mol), and an increase in the temperature favoured this spontaneity. Extraction using the classical Soxhlet method was evaluated for comparison purposes using ethanol and n‐hexane as solvents and ethanol showed a better extraction efficiency. The maximum yield obtained with pressurized liquid extraction (PLE) was 24.42 %, which represents ∼94 % of the yield obtained by classical extraction. Linoleic and oleic acids were the main fatty acids identified in the soybean oil, representing ∼76 % of the fatty acids composition, which was not influenced by the extraction method or the temperature used in the PLE.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

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Pressurized liquid extraction of oil from soybean seeds

2017

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“…Pressurized liquid extraction (PLE) is a technique that combines temperature and pressure with the use of liquid solvents to achieve rapid and efficient extraction, and it is associated with low solvent consumption . The literature reports the efficiency of this technique for extracting oil from wheat germ, grape seed, palm, watermelon seed, and safflower; however, PLE does not appear to have been applied to obtain macauba pulp oil.…”

Section: Introductionmentioning

confidence: 99%

Pressurized liquid extraction of macauba pulp oil

et al. 2017

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The aim of this study was to investigate the extraction of oil from macauba pulp using ethanol and isopropanol as pressurized solvents. Experiments were carried out in a semi‐continuous extractor system at various temperatures (40, 60, and 80 °C) maintaining the pressure fixed at 10 000 kPa and the solvent flow at 3 mL/min and also using conventional extraction (in a Soxhlet). For both methods assessed, higher yields were obtained with the use of ethanol as the solvent. In the pressurized liquid extraction (PLE), an increase in temperature from 40 to 60 °C provided higher yields at 72 min of extraction, which was not influenced by the extraction carried out at 80 °C. This temperature effect was also observed in the extraction kinetics data. The maximum yields obtained by PLE were 44.78 % and 37.12 % with ethanol and isopropanol, respectively, which represents ∼77 % of the yield obtained by conventional extraction. Oleic and palmitic acids are the main fatty acids identified in macauba pulp oil, representing ∼88 % of the fatty acids composition, which was not influenced by the extraction method and solvent used. PLE with ethanol provides oils with higher levels of β‐carotene. The flavonoid content was higher with the use of isopropanol; however, it was not influenced by the method used.

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“…Supercritical CO 2 extraction method, a new green technology for the extraction and separation of oil or bioactive compounds, has several advantages. For example, it has a high extraction efficiency, a lower operation temperature, a shorter extraction time and the use of lower amounts of extraction solvents compared with conventional extraction methods (Soxhlet extraction and maceration) (Conte et al, ; Duba & Fiori, , ; Freitas, Dariva, Jacques, & Caramão, ; Mustafa & Turner, ). The supercritical CO 2 extraction of tea seed oil has been investigated by several researchers to study the effects of parameters such as extraction pressure, extraction temperature, extraction time, and cosolvents on the yield and composition of the extracted oil (Rajaei et al, ; Xu, Zhong, Liu, Long, & Li, ; Zhou, Gu, & Gu, ).…”

Section: Introductionmentioning

confidence: 99%

Physicochemical properties and antioxidant activity of oil extracted from Assam tea seeds (Camellia sinensisvar.assamica) by supercritical CO₂extraction

Muangrat

Jirarattanarangsri

2020

J Food Process Preserv

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Response surface methodology (RSM), based on a central composite design, was used to simultaneously predict the optimal condition for oil extraction of Assam tea seeds via supercritical CO2 extraction method. The established regression mathematical model oil extraction was good enough for the prediction of experimental results (e.g., crude oil yield). The optimized extraction condition (50°C under 220 bar for 4 hr) providing the best quality of oil has high percentage of crude oil yield and oil recovery, low values of acid, free fatty acids, peroxide, and thiobarbituric acid reactive substances (TBARS), high values of iodine and saponification, and high phenolic content and low values of DPPH (IC50) and ABTS (IC50). Flavonoid, tannin, and saponin were detected in the extracted oil samples. In addition, major fatty acids in the extracted oil were oleic, linoleic, and palmitic acids. Practical applications Supercritical CO2 extraction can potentially be used for the extraction of oil from Assam tea seeds (Camellia sinensis var. assamica), providing a high oil yield. Assam tea seed oil obtained by supercritical CO2 extraction had a high antioxidant activity. The main fatty acids were oleic acid, linoleic acid, and palmitic acid. The obtained oil contained flavonoids, tannins, and saponins and is, therefore, a potential source of active and functional compounds used in the food industry, the production of food supplements and the pharmaceutic and cosmetic industries.

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Pressurized liquid extraction and chemical characterization of safflower oil: A comparison between methods

Cited by 53 publications

References 30 publications

Pressurized liquid extraction of oil from soybean seeds

Pressurized liquid extraction of oil from soybean seeds

Pressurized liquid extraction of macauba pulp oil

Physicochemical properties and antioxidant activity of oil extracted from Assam tea seeds (Camellia sinensisvar.assamica) by supercritical CO₂extraction

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Pressurized liquid extraction and chemical characterization of safflower oil: A comparison between methods

Cited by 53 publications

References 30 publications

Pressurized liquid extraction of oil from soybean seeds

Pressurized liquid extraction of oil from soybean seeds

Pressurized liquid extraction of macauba pulp oil

Physicochemical properties and antioxidant activity of oil extracted from Assam tea seeds (Camellia sinensisvar.assamica) by supercritical CO2extraction

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Product

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Physicochemical properties and antioxidant activity of oil extracted from Assam tea seeds (Camellia sinensisvar.assamica) by supercritical CO₂extraction