Diffusion Extraction of Oil-Containing Materials

Krasuk, J. H.; Lombardi, J.; Ostrovsky, C. D.

doi:10.1021/i260022a006

Cited by 20 publications

(22 citation statements)

References 7 publications

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“…Under certain conditions, it was possible to extract practically all of the oil contained in the sapote almonds. The apparent diffusivity coefficient of the oil from the unbroken seed cells was 6.9 × 10 −13 at 25 °C, a value whose magnitude is similar to that reported in the literature for other oilseeds, like peanuts and soybeans (Krasuk et al, 1967). Laiz-Saldaña et al (2009), showed the possibility of using mamey seed oil for biodiesel production, highlighting a favorable outlook from economic and technical points of view, since the mamey seed is still a residue.…”

Section: Introductionsupporting

confidence: 73%

Mamey sapote seed oil (<em>Pouteria sapota</em>). Potential, composition, fractionation and thermal behavior

Solís‐Fuentes¹,

Ayala-Tirado²,

Fernández-Suárez³

et al. 2015

Grasas y Aceites

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SUMMARY:The chemical composition of the waste from mamey sapote (Pouteria sapota) and its oil extracted from the seed (MSSO) of ripe and unripe fruits, was studied. The MSSO from ripe fruits was dry-fractionated, and the thermal and phase behaviors of its fractions and their mixtures with other known natural fats were analyzed. The main components of the mamey peel and the seed were crude fiber (81.32%) and fat (44.41% db), respectively. The seed oil contained oleic, stearic, palmitic and linoleic as its main fatty acids. The MSSO showed a simple thermal behavior with a broad fusion range and four maximum temperature peaks. The solid fractions showed maximum melting peaks at higher temperatures than the residual liquid. The MSSO solid fractions showed a potential for use as constituents in mixtures with other natural fats, such as cocoa butter or mango seed fat.KEYWORDS: DSC; Mamey sapote; Oil fractionation; Pouteria sapota; Seed oil RESUMEN: Aceite de semilla de Zapote Mamey (Pouteria sapota). Potencialidad, composición, fraccionamiento y comportamiento térmico. Se estudió la composición de los residuos del zapote mamey (Pouteria sapota) y del aceite extraído de la semilla (ASZM) de frutos maduros e inmaduros. El ASZM de frutos maduros fue fraccionado en seco y se analizó la conducta térmica y de fase de las fracciones y mezclas de éstas con otras grasas naturales conocidas. Los principales componentes de la cáscara y de la semilla fueron fibra cruda (81.32% bs) y grasa (44.41% bs), respectivamente. Los principales ácidos grasos del ASZM fueron: oleico, esteárico, palmítico y linoleico y mostró una conducta térmica simple con un intervalo de fusión amplio y cuatro máximos de temperatura. Las fracciones sólidas obtenidas presentaron máximos de fusión a temperaturas más altas que la fracción líquida residual. Las fracciones sólidas del ASZM mostraron potencialidad para usarse como constituyente en mezclas con la manteca de cacao y la grasa de la semilla de mango.

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Section: Introductionsupporting

confidence: 73%

Mamey sapote seed oil (<em>Pouteria sapota</em>). Potential, composition, fractionation and thermal behavior

Solís‐Fuentes¹,

Ayala-Tirado²,

Fernández-Suárez³

et al. 2015

Grasas y Aceites

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“…It should be mentioned that similar results to those here presented can be obtained with a one point collocation solution to the diffusion equation instead of the truncated Fourier series solutions assumed in this work. One of the expressions for the diffusion-concentration relationship obtained in this work is compared with the one previously reported in the literature (Krasuk et al, 1967), obtained by a different method, through the numerical solution of the diffusion equation with each one of them and the comparison of the predicted concentrations with the experimental ones.…”

Section: Introductionmentioning

confidence: 91%

“…The experimental conditions were such that the process could be considered isothermal, the oil concentration at the interface but on the solvent side can be considered zero (therefore also at the seed surface) and the oil-solvent flow was unidirectional in the axial direction. The oil extraction process can be represented by a diffusion model (Alvarez et al, 2001;Aguilera and Stanley, 1999;Krasuk et al, 1967;Fan and Morris, 1948). The solution to the diffusion equation for a semi-infinite plate in terms of the quantity of oil per unit mass of solid, q (g/g), is given by (Alvarez et al, 2001;Fan and Morris, 1948;Krasuk et al, 1967) …”

Section: Model Of the Extraction Processmentioning

confidence: 99%

“…In drying the regular regime method has been applied for determining diffusion-concentration relationships (Schoeber, 1976;Luyben et al, 1980;Martínez et al, 2005). In extraction a trial and error procedure to match a reported general solution has been applied (Krasuk et al, 1967). Optimization approaches based on the discretized diffusion equation has also been applied (Loulou Tahar et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…The experimental data utilized in the present analysis are those reported by Krasuk et al (1967). The method could be applied to determination of diffusion-concentration dependence in other processes modelled by the diffusion equation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Apparent diffusion model assessment in extraction processes by means of a Luenberger observer

Martínez-Vera

Ruiz-Martínez

Vizcarra-Mendoza

et al. 2010

Journal of Food Engineering

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Counter‐current solid liquid extraction in a cascade of batch extractors

Plachco¹,

Lago²

1972

Can J Chem Eng

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An analytical solution and method of calculation is presented for a cascade of N perfectly mixed batch extractors operating counter-currently, for spherical solid particles, with parameters which may vary for each extractor.The results for the case of constant and equal parameters along the complete cascade are presented in dimensionless plots; N varies from 1 through 10.The practical interest of these diagrams lies in their use in design and/or in foreseeing the behavior of a cascade when its parameters undergo variations.A sample calculation is included.ounter-current solid-liquid extraction in a cascade C of batch extractors, perfectly mixed and with finite volume, is widely used because of its mechanical simplicity, good efficiency and flexibility. However, a rigorous analytical treatment of this arrangement is not to be found in the literature. Thorough bibliographical reviews of solid-liquid extraction and current design methods appear elsewhere".*'. This industrial set-up is used in the extraction of oils from oilbearing seeds, of sugar from beets, of tannin quebracho, of different soluble substances from fish, etc.In this work an analytical treatment and a method of calculation is presented which takes into consideration parameters which vary in a discrete way for each extractor. This might be important in systems which show shrinking or swelling of the solid or variations of diffusivity, the constant of the adsorption isotherm, apparent density of the solution, etc. and when a certain average for each extractor. can be assumed.It is well known that the products of biological origin present variable diffusivities and therefore constitute non-linear problems, the solution of which is often numerical and highly specific. If an adequate value of the diffusivity is taken for each extractor it is possible to obtain which agree fairly well with experimental determinations. This must be considered as a first approximation to the solution of the problem. In this present work the following assumptions are made for extractor i: 1. The diffusivity is constant. 2. The adsorption isotherm is linear. 3. The resistance to mass transfer in the film is 4. The apparent density of the solvent PI,, remains 5. The dimensions of the so'lid are constant. 6. The mixing is perfect. 7. The solid has a given size and geometry. The assumptions 2 and 3 have been ascertained negligible. constant. On prksente une solution analytigue et une methode de calcul dans le cas d'une cascade de n extracteurs pour particules solides et sphkriques parfaitement mklangh, lesqueh fouctionnent B contre-courant; les param&res peuvent varier pour chaque extracteur. (31 prksente, sous forme de diagrammes sans dimensions, les rksultats dans le cas de paramares constants et &gaux sur la cascade entiere; la valeur de n varie de 1 h 10. L'intkret pratique des dits diagrammes se trouve dans leur emploi pour un projet de conception ou pour la prkliction du comportement d'une cascade, lorsque ses paramktres subissent des variations. On prksente un calcul comme...

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Diffusion Extraction of Oil-Containing Materials

Cited by 20 publications

References 7 publications

Mamey sapote seed oil (<em>Pouteria sapota</em>). Potential, composition, fractionation and thermal behavior

Mamey sapote seed oil (<em>Pouteria sapota</em>). Potential, composition, fractionation and thermal behavior

Apparent diffusion model assessment in extraction processes by means of a Luenberger observer

Counter‐current solid liquid extraction in a cascade of batch extractors

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