Mechanical Continuous Oil Expression from Oilseeds: A Review

Savoire, Raphaëlle; Lanoisellé, Jean‐Louis; Vorobiev, Eugène

doi:10.1007/s11947-012-0947-x

Cited by 153 publications

(130 citation statements)

References 33 publications

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“…Savoire et al conducted a large review of influential factors in hydraulic and screw pressing [4]. The use of a piston is necessary to perform expression during hydraulic pressing, which puts a specific pressure on the material.…”

Section: Process and Proceduresmentioning

confidence: 99%

“…A twin-screw extruder is based on: a conveying action realized by forward pitch screw, and radial compression and shearing actions by Monolobe screw. Bilobe, which exerts a significant mixing and shearing action, conveying and axial compression actions in combination with forward pitch screw, and reversed pitch screw, which carries out intensive shearing and considerable mixing, and exerts strong axial compression in combination with a forward pitch screw [4].…”

Section: Process and Proceduresmentioning

confidence: 99%

See 1 more Smart Citation

Solvent-free extraction of food and natural products

Chémat

Fabiano-Tixier

Vian

et al. 2015

TrAC Trends in Analytical Chemistry

154

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This review presents useful and green techniques of solvent-free extraction used in ancient times, such as extraction of olive oil and citrus essential oil, and innovative techniques, such as pulsed electric field, microwave, instantaneous controlled pressure drop, and extrusion. We discuss the devices, their applications, mechanisms, and parameters influencing sample preparation prior to analysis of natural products.

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Section: Process and Proceduresmentioning

confidence: 99%

Section: Process and Proceduresmentioning

confidence: 99%

Solvent-free extraction of food and natural products

Chémat

Fabiano-Tixier

Vian

et al. 2015

TrAC Trends in Analytical Chemistry

154

View full text Add to dashboard Cite

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“…These consist of a number of unit operations such as cracking, cooking, flaking, drying or moistening (Wiesenborn et al, 2001;Martínez et al, 2008;Savoire et al, 2013;Martínez and Maestri, 2015;Martínez et al, 2017). Seed moisture content appears to be a key process variable, as reported in several research projects with various oilseeds (Singh and Bargale, 1990;Hamm and Hamilton, 2000;Wiesenborn et al, 2001;Singh et al, 2002;Martínez et al, 2008;2012;2017).…”

Section: Introductionmentioning

confidence: 97%

Walnut and almond oil screw-press extraction at industrial scale: Effects of process parameters on oil yield and quality

et al. 2018

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Walnut and almond kernels are highly nutritious mainly due to their high oil contents. In this study, 32 factorial experimental designs were used to optimize processes for oil extraction by screw-pressing at industrial scale. Experimental designs included seed moisture content (SMC), and restriction die (RD) as the main processing parameters. Theoretical models were scanned against experimental data in order to optimize oil extraction conditions. The response variables analyzed were oil yield (OY), fine solid content (FC) in oil, and oil quality parameters. Fitted models for OY indicated maximum predicted values similar to the highest experimental values. Walnut oil extractions showed a maximum OY (84.5 ± 2.3 %) at 7.21% SMC, and 10 mm RD. For almond kernels, maximum OY (71.9 ± 3.5%) was obtained at 9.42% SMC, and 12 mm RD. Chemical quality parameters from both oils were in the ranges stated in Codex (FAO/WHO) standards for virgin (non-refined) oils.

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“…Generally, the oil extraction is based on two main steps: pressing (solid-liquid expression) and solvent extraction. Mechanical and thermal pre-treatments preceded these processes and contribute to enhance their performances (Savoire et al, 2013). After the first extraction by pressure with an expeller, the resulting solid matter has a relatively high fat content (approximately 15-18%) and it is subjected to a solvent extraction to exhaust the oil retained (Kovari, 2004).…”

Section: Introductionmentioning

confidence: 99%

Characterization of sunflower oils obtained separately by pressing and subsequent solvent extraction from a new line of seeds rich in phytosterols and conventional seeds

Aguirre

Velasco

Méndez

2014

OCL

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-In this study we evaluate the chemical composition of sunflower oils obtained separately by pressing and subsequent solvent extraction from a new seeds rich in phytosterols (IASP-18) and conventional seeds . Results have shown that the total content of oil was much lower in the IASP-18 (18.1%) than in the conventional (37.5%) seeds. The extraction yield obtained by pressing was as low as 3% in the IASP-18 seeds and 37.5% in HA-89, while in the solvent extraction it was of the same order (∼18 wt% on seeds extracted by pressing) for the two types of seeds. No significant changes in the fatty acid composition were found between the oils extracted by the two procedures, but the pressed oils presented significantly lower acidity and larger content of the unsaponifiable fraction. Expressed as free sterols, the total sterols were 37-38% more concentrated in the oils extracted with solvent, reaching amounts of 13 700 and 6500 mg/kg in the IASP-18 and HA-89 oils, respectively. No substantial differences were found in the composition of total sterols analysed as free sterols between the oils extracted with the two procedures, but the contents of free sterols and sterol glycosides were much higher in the oils extracted with solvent.Keywords: Sunflower oil / pressing / solvent extraction / phytosterols Résumé -Caractérisation des huiles de tournesol obtenues séparément par pressage et extraction ultérieure par solvant à partir des nouvelles graines riches en phytostérols et des graines conventionnelles. Dans cette étude, nous évaluons la composition chimique des huiles de tournesol obtenues séparément par pressage et ultérieure extraction par solvant, à partir de nouvelles graines riches en phytostérols (IASP-18) et des graines conventionnelles (HA-89). Les résultats ont montré que la teneur totale en huile était beaucoup plus faible dans l'IASP-18 (18,1 %) que dans les des graines conventionnelles (37,5 %). Le rendement d'extraction obtenu par pressage était aussi bas que 3 % dans les graines de l'IASP-18 et de 37,5 % dans les HA-89, tandis que dans le solvant d'extraction, il était du même ordre (∼18 % en poids des graines extraites par pressage) pour la deux types de graines. Aucune modification significative de la composition en acides gras n'a été trouvée entre les huiles extraites par les deux procédures, mais les huiles pressées présentaient une acidité significativement inferieur et supérieure teneur de fraction insaponifiable. Exprimé en stérols libres, les stérols totaux étaient 37-38 % plus concentrés dans les huiles extraites avec solvant, atteignant, respectivement, les montants de 13 700 et 6500 mg/kg dans les huiles d'IASP-18 et de HA-89. Aucune différence substantielle n'a été trouvée dans la composition de stérols totaux analysés sous forme de stérols libres entre les huiles extraites avec les deux procédés, mais le contenu de stérols libres et les glucosides de stérols étaient beaucoup plus élevés dans les huiles extraites avec solvant.Mots clés : Huile de tournesol / pressage / extraction par so...

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Mechanical Continuous Oil Expression from Oilseeds: A Review

Cited by 153 publications

References 33 publications

Solvent-free extraction of food and natural products

Solvent-free extraction of food and natural products

Walnut and almond oil screw-press extraction at industrial scale: Effects of process parameters on oil yield and quality

Characterization of sunflower oils obtained separately by pressing and subsequent solvent extraction from a new line of seeds rich in phytosterols and conventional seeds

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