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High Pressure Extraction as a Green Alternative to the Conventional Sunflower Oil (Helianthus annuus) Production Process – Extraction with Pressurized Ethanol in an Intermittent Process and with Supercritical Fluid

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Pubblicato in:Global Challenges vol. 8, no. 11 (Nov 1, 2024)
Autore principale: Vicentini‐Polette, Carolina Medeiros
Altri autori: Yamada, Beatriz Satie, Ramos, Paulo Rodolfo, da Silva, Marta Gomes, Oliveira, Alessandra Lopes de
Pubblicazione:
John Wiley & Sons, Inc.
Soggetti:
Brazil
Process variables
Ethanol
Fatty acids
High pressure
Vitamin E
Clean technology
Sunflower oil
Vegetable oils
Atmospheric pressure
Oil recovery
Carbon dioxide
Supercritical fluids
Oils & fats
Nitrogen
Tocopherols
Raw materials
Solvents
Viscosity
Tocopherol
Supercritical gas extraction
Temperature
Seeds
High temperature
Hexanes
Triglycerides
Environmental
Helianthus annuus
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Abstract:This research explores green‐technology alternatives to extract vegetable oils as alternatives to hexane, a non‐renewable solvent, focussing on sunflower oil. It compares pressurized liquid extraction (PLE) with ethanol and supercritical fluid extraction (SFE) with CO2. Both processes aim to maximize oil yield, tocopherol content (α, β, γ, and δ), fatty acid profile (FA), and triacylglycerol (TAG) composition. Results show that SFE at 32 MPa achieves an 87.58% oil recovery, while PLE at 84 °C achieves 93.93%. PLE with ethanol extracts polar minority compounds along with the oil due to its higher temperature, favoring extraction. The total tocopherol content is 91.17 mg/100 g of oil in optimized SFE conditions, with α‐tocopherol extraction influenced by temperature, γ and δ‐tocopherol by pressure. PLE yields 83.16 mg/100 g of oil in tocopherols influenced less by process variables. The fatty acid (FA) profile do not vary in the oils obtained from different processes or based on the variables within each process, with linoleic and oleic acids being the most abundant. Similarly, triacylglycerols (TAGs) C54:5 and C54:6 are predominant. The optimization of SFE and PLE processes indicates a strong potential for using green solvents in the extraction of tocopherol‐rich sunflower oil.
ISSN:2056-6646
DOI:10.1002/gch2.202300335
Fonte:Publicly Available Content Database