Deacidification of olive oils by supercritical carbon dioxide

Brunetti, Lucio; Daghetta, A.; Fedell, E.; Kikic, Ireneo; Zanderighi, L.

doi:10.1007/bf02546062

Cited by 80 publications

(41 citation statements)

References 10 publications

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“…As mentioned above, pressure and density have a close relation, and the extraction effect becomes higher when pressure is high. Several authors have investigated the extraction and purification of lipid compounds, such as triacylglycerols, free fatty acids, and sterols, using scCO 2 [29]- [33]. It is anticipated that lower molecular weight polymer chains are extracted properly at 14 MPa, and it seems that the oil which dissolved in the scCO 2 effectively replace shorter polymer chains, and is impregnated.…”

Section: Effect Of Pressure On Impregnation Of Poly(l-la) Random Copomentioning

confidence: 99%

Supercritical Fluid Impregnation of Essential Bark Oil in Copolymers of L-Lactide with 7-Membered Cyclic Compounds

Tsutsumi

Hara²,

Ueno³

et al. 2014

JBNB

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In order to develop a novel controlled-release material, we previously attempted to impregnate poly(L-lactide) (poly(L-LA)), poly(L-LA-ran-CL) (CL: ε-caprolactone) or poly(L-LA-ran-TEMC) (TEMC: tetramethylene carbonate) with low boiling point, organic useful compounds using supercritical carbon dioxide (scCO2) as the solvent. In this work, the factors influencing impregnation of poly (L-LA) random copolymers with useful compounds were investigated under scCO2 using the copolymers previously used. The influence of temperature, pressure, and time on the impregnation contents of the useful compounds on the copolymers was evaluated. The polymer used, which is a base of this material, was poly(L-LA-ran-CL), poly(L-LA-ran-TEMC), or poly(L-LA-ran-DXO) (DXO: 1,5-dioxepan-2-one). Statistical random copolymers of L-LA with CL, TEMC, or DXO were synthesized using Sn(oct)2 as a catalyst at 150˚C for 24 h without solvent. Preparation of the controlled-release materials was carried out using essential bark oil from Thujopsis dolabrata var. hondae and synthetic L-LA random copolymers as a base material under scCO2. The impregnation experiment, which investigated the influence of pressure, was conducted in the range of 10 to 20 MPa. The influence of temperature on impregnation was carried out at 40˚C to 100˚C. Impregnation time was varied from 1 to 5 h.

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Section: Effect Of Pressure On Impregnation Of Poly(l-la) Random Copomentioning

confidence: 99%

Supercritical Fluid Impregnation of Essential Bark Oil in Copolymers of L-Lactide with 7-Membered Cyclic Compounds

Tsutsumi

Hara²,

Ueno³

et al. 2014

JBNB

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“…Despite its higher FFAs, they found that Folch-extracted oil revealed much better oxidative stability as the polar solvent was able to extract the phospholipids that acted as a synergist for the primary antioxidant present in crude oil (tocopherols). It has been also reported the SFE oils showed significantly higher FFAs content than their solvent-extracted counterparts; however the high amounts of FFAs were not considered an indication of increased hydrolysis during extraction procedure, but are due to poor recovery [21,47,48].…”

Section: Chemical Propertiesmentioning

confidence: 99%

Quality of Canola Oil Obtained by Conventional and Supercritical Fluid Extraction

Khattab¹,

Rempel²,

Suh³

et al. 2012

AJAC

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Quality of canola oil obtained by the supercritical fluid extraction (SFE), using CO 2 with ethanol as a co-solvent, was evaluated and compared to that of the conventionally-obtained oils using either n-hexane or chloroform methanol mixture. Physical characteristics, chemical properties, fatty acid composition and phenolic profile of oils were investigated. The SFE oil showed significantly lower melting point, peroxide value (PV) and higher free fatty acids (FFAs) and iodine value (IV) than the n-hexane-extracted one. There were no significant differences in the fatty acid composition of different oils. The SFE oil showed significantly higher phenolic content (35.91, 10.15, 3.16, 0.32 and 47.48 μg/g of sinapic acid, sinapine, sinapoyl glucose, canolol and total phenolics) as compared to 0.08, 0.70, 0.88, 0.45 and 0.71 μg/g, respectively in the n-hexane-extracted oil. These results indicate the superiority of SFE and advocate its use for the extraction of highly stable and functional canola oil for further health and nutraceutical uses. The present results have an industrial and technological relevance as SFE could be competitive with the traditional extraction techniques providing an environmental approach and enhancing the obtained oil quality and stability. After recovery of the initial installation costs, SFE could be more economic than conventional extraction. However, further economical studies are needed to validate this last conclusion.

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“…Ooi et al (1996) decreased the FFA content of palm oil to 0.1% in a continuous SC-CO 2 extractor. Brunetti et al (1989) obtained deacidification of high acidic olive oil with SC-CO 2 at pressures of 20 and 30 MPa, and temperatures of 40 and 60 °C. They reported that the selectivity for FFAs was highest at 20 MPa and 60 °C.…”

Section: Deacidificationmentioning

confidence: 98%