A twin‐screw extruder for oil extraction: II. Alcohol extraction of oleic sunflower seeds

Dufaure, Corinne; Mouloungui, Zéphirin; Rigal, Luc

doi:10.1007/s11746-999-0207-z

Cited by 17 publications

(11 citation statements)

References 10 publications

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“…The vegetable oil used for saponifications was a crude HOSO obtained from high-oleic sunflower seeds (Toulousaine des Céréales, Toulouse, France) by a twinscrew extruder in our laboratory (4,5). The fatty acid composition of the crude oil was determined by gas chromatography after methylation (column: CP-FFAP CB, film thickness = 0.25 µm, 25 m × 0.15 mm; injector: split, 280°C; oven: 1 min at 160°C, 160 to 200°C at 2°C/min, 10 min at 200°C, 200 to 220°C at 5°C/min, 25 min at 220°C; detector: FID, 300°C) as follows: palmitic acid 16:0, 3.9%; stearic acid 18:0, 3.8%; oleic acid 18:1, 83.1%; linoleic acid 18:2, 8.2%; and behenic acid 22:0, 1.0%.…”

Section: Methodsmentioning

confidence: 99%

Fourier‐transform infrared spectra of fatty acid salts—Kinetics of high‐oleic sunflower oil saponification

Poulenat

Sentenac

Mouloungui

2003

J Surfact & Detergents

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Sodium, lithium, and calcium soaps obtained by saponification of high-oleic sunflower oil were studied by Fourier-transform infrared spectroscopy. Spectra of crude mixtures containing soap, glycerin, residual alkali, and triacylglycerols were compared to those of pure soaps obtained from fatty acids. The infrared spectra of crude soaps showed the same characteristic bands as pure ones. The absorption bands of asymmetric (ω 2 ) and symmetric (ω 1 ) stretching vibrations of the carboxylate group indicated that the metal-oxygen bonds of these soaps had an ionic character whose strength differed from one cationic counterion to another. Once the characteristic absorption bands of the soaps were assigned, a kinetics study of saponification was performed. Saponification by sodium, anhydrous lithium, and calcium hydroxides was an autocatalytic reaction, characterized by an Sshaped kinetics curve, whereas saponification by aqueous lithium hydroxide was stoichiometric. The structure of the metal-oxygen bond played a role in the kinetic mechanisms.Paper no. S1345 in JSD 6, 305-310 (October 2003).KEY WORDS: Alkaline-earth soaps, alkaline soaps, higholeic sunflower oil, infrared spectroscopy, kinetics of saponification, saponification.Among all the oleaginous plants having a high-oleic acid content, only sunflower is grown on a large scale in open fields throughout the world. The high-oleic sunflower oil (HOSO) obtained from these plants is available for food uses as well as for industrial ones. The properties of HOSO are linked to their high content of oleic acid (18:1): stability vs. oxidation, fluidity, and a monounsaturated substrate. Its vegetable origin is a commercial asset for many applications, commercial as well as technical. Soap manufacture from vegetable oils is quite well known and used, but few quantitative studies have been done on the saponification reaction itself. Soaps with a high-oleic acid content once were manufactured from tallow, but because of the spread of the bovine spongiform encephalopathy and the importance of oleaginous plant farming in the northern hemisphere, e.g., sunflower cultivation, a more accurate study of saponification is now needed to produce alkaline or alkaline-earth soaps easily from vegetable oils.Study of the infrared spectra of soaps allows us to compare crude soaps, obtained from the saponification of triacylglycerols (TAG) of vegetable oils, with those obtained by more traditional means [the neutralization of fatty acids (1,2), a double decomposition reaction between an alkaline soap and a metallic salt (3), or the fusion of fatty acids (3)]. The choice of metallic counterion in the soap is essential; physiochemical properties of the final product, and thus its uses, depend on it. Moreover, Fourier-transform infrared (FTIR) spectroscopy enables one to compare the kinetics of saponification of HOSO based on the metallic hydroxide used: sodium, lithium, or calcium hydroxide. The aim of this study was thus to characterize crude soaps and then to evaluate the kinetics of the sapo...

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Section: Methodsmentioning

confidence: 99%

Fourier‐transform infrared spectra of fatty acid salts—Kinetics of high‐oleic sunflower oil saponification

Poulenat

Sentenac

Mouloungui

2003

J Surfact & Detergents

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“…A solvent-assisted twin-screw extrusion process using alcohols acidified with phosphoric acid for the extraction of vegetable oil has been developed and evaluated by Gaset et al (1999). The addition of an acid enhances the oil extraction capacity, as it has been shown to disintegrate the cell membranes of the oil bodies, which, in conjunction with the mechanical action of the extruder, facilitates oil liberation (Dufaure et al, 1999b;Gaset et al, 1999). Next to this, phosphoric acid acts as a degumming agent and associates with the phospholipids naturally present in the vegetable oil, forming a hydrophilic complex that remains in the press cake after oil extraction.…”

Section: Solvent-assisted Vegetable Oil Extractionmentioning

confidence: 99%

“…Even though it is currently not yet applied in the oilseed processing industry, it may present a promising technique for sustainable vegetable oil extraction. Therefore, it has been increasingly applied to achieve efficient oil extraction from various oilseeds (Dufaure et al, 1999b;Evon et al, 2013;Isobe et al, 1992;Kartika et al, 2006Kartika et al, , 2010Li et al, 2007;Uitterhaegen et al, 2015) and even from the whole sunflower plant (Evon et al 2010a(Evon et al , 2016. This review aims to provide a clear and concise overview of recent research focusing on twin-screw extrusion technology as a means for vegetable oil extraction.…”

Section: Introductionmentioning

confidence: 99%

Twin-screw extrusion technology for vegetable oil extraction: A review

Uitterhaegen

2017

Journal of Food Engineering

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Vegetable oils present a valuable class of bioresources with applications in both food and non-food industries and a production that has been steadily increasing over the past twenty years. Their extraction from oilseeds is a key process, as it exerts a strong impact on the resulting oil characteristics and quality. In view of the recent pressure towards sustainability, oilseed processing industries are taking renewed interest in thermomechanical pressing as a means to obtain high quality oils. This work focuses on twinscrew extrusion for vegetable oil extraction and reviews recent technological advancements and research challenges for the design and optimization of novel oil extraction processes. It comprises a critical analysis of the application of twin-screw extruders against their more conventional single-screw counterparts. Further, a comprehensive overview of the key parameters influencing the process performance is provided, while considerable attention is given to the development of innovative green extraction processes using twin-screw extrusion.

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“…Conducted for nearly twenty-five years at LCA laboratory, several studies have highlighted the multiple possibilities of the twin-screw technology for both fractionation and valorization of agricultural resources. Some examples are following: (i) the mechanical pressing and/or the solvent extraction of vegetable oil from sunflower (Dufaure et al, 1999a(Dufaure et al, , 1999bAmalia Kartika et al, 2005, 2006, 2010Evon et al, 2007Evon et al, , 2009Evon et al, , 2010aEvon et al, , 2012a, neem (Faye, 2010), jatropha and coriander (Sriti et al, 2012;Uitterhaegen et al, 2015) oleaginous seeds, (ii) the extraction of hemicelluloses from lignocellulosic plant materials (Manolas, 1993;N'Diaye, 1996;Prat, 1998;N'Diaye and Rigal, 2000;Maréchal, 2001), (iii) the extraction of pectic substances from the pith of sunflower stalk (Maréchal and Rigal, 1999) or sugar beet pulp (Jorda, 2003), (iv) the extraction of vegetable proteins (Silvestre et al, 1999; Fig. 1.…”

Section: The Potential Of Twin-screw Processes For the Fractionation mentioning

confidence: 99%

The thermo-mechano-chemical twin-screw reactor, a new perspective for the biorefinery of sunflower whole plant: aqueous extraction of oil and other biopolymers, and production of biodegradable fiberboards from cake

Evon

Vandenbossche

Labonne

et al. 2016

OCL

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-Biorefinery of sunflower whole plant was performed successfully using a thermo-mechano-chemical twinscrew reactor. This led to the aqueous extraction of oil and other biopolymers like proteins, pectins and non pectic sugars. It resulted in the overall fractionation of biomass, thus allowing a complete valorization of the input. This biorefinery process was not only efficient but it was also environment-friendly. In addition, it contributed to the production of different end products for various industrial applications. Firstly, the hydrophilic phase will be recycled to the process. Secondly, the densest oil-in-water emulsion is a promising candidate for the formulation of cosmetic creams. Thirdly, the upper hydrophobic phase will be usable for the waterproofing treatment of the surface of agromaterials by coating. Its demixing will also lead to the production of proteins with tensioactive properties. These will serve for the food industry. Lastly, the cake was a mixture of plasticized proteins and lignocellulosic fibers. It was thus considered as a natural composite. Its molding into cohesive fiberboards was conducted successfully using both thermopressing and compression molding processes. The self-bonded boards with high density will be suitable for use as load bearing boards in dry conditions (floor underlayers, interior partitions, furniture, etc.). Positioned in walls and ceilings, boards with medium and low density will contribute to the heat insulation of buildings. In addition, the bulk cake will be also usable as a loose fill insulation material. As proposed, this flow chart thus allows a valorization for all fractions originating from the twin-screw reactor.Keywords: Biorefinery / twin-screw extruder / sunflower whole plant / thermo-mechano-chemical fractionation / aqueous extraction Résumé -Le réacteur thermo-mécano-chimique bi-vis, une nouvelle perspective pour le bioraffinage de la plante entière de tournesol : extraction aqueuse de l'huile et d'autres biopolymères, et production de panneaux de fibres biodégradables à partir du tourteau. Le bioraffinage du tournesol plante entière a été réalisé avec succès en utilisant un réacteur thermo-mécano-chimique bi-vis. Cela a permis l'extraction aqueuse de l'huile et d'autres biopolymères tels que des protéines, des pectines et des sucres non pectiques. Un fractionnement total de la biomasse a été obtenu, permettant ainsi une valorisation complète de la matière entrante. À la fois efficace et respectueuse de l'environnement, cette bioraffinerie a généré plusieurs produits finaux pour diverses applications industrielles. Tout d'abord, la phase hydrophile pourra être recyclée en tête de procédé. Puis, l'émulsion huile/eau la plus dense pourra être utilisée pour la formulation de crèmes cosmétiques. Pour sa part, la phase hydrophobe supérieure sera utilisable pour le traitement de surface des agromatériaux par enduction afin de les rendre moins sensibles à l'eau. Sa démixtion facilitera également l'obtention de protéines tensioactives, utilisables da...

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A twin‐screw extruder for oil extraction: II. Alcohol extraction of oleic sunflower seeds

Cited by 17 publications

References 10 publications

Fourier‐transform infrared spectra of fatty acid salts—Kinetics of high‐oleic sunflower oil saponification

Fourier‐transform infrared spectra of fatty acid salts—Kinetics of high‐oleic sunflower oil saponification

Twin-screw extrusion technology for vegetable oil extraction: A review

The thermo-mechano-chemical twin-screw reactor, a new perspective for the biorefinery of sunflower whole plant: aqueous extraction of oil and other biopolymers, and production of biodegradable fiberboards from cake

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