Artículos de revistas
Adsorption Isotherms For Oleic Acid Removal From Ethanol + Water Solutions Using The Strong Anion-exchange Resin Amberlyst A26 Oh
Registro en:
Journal Of Chemical And Engineering Data. , v. 50, n. 5, p. 1529 - 1534, 2005.
219568
10.1021/je049675y
2-s2.0-25644436290
Autor
Cren E.C.
Meirelles A.J.A.
Institución
Resumen
Adsorption isotherms for the removal of oleic acid from ethanol + water solutions using a strong anion-exchange resin (Amberlyst A26 OH) were experimentally determined. The equilibrium data were correlated using the Langmuir model by adjusting the parameters qm/(g of acid-g of dry resin-1), maximum content that can be adsorbed on solid phase, and KdKg of acid·g of solvent-1), the equilibrium constant. The Freundlich and Redlich-Petersen models were also used, but the Langmuir model shows the lower average deviations between experimental and calculated results. The behavior and the capacity of the resin to remove the fatty acid from the liquid phase were evaluated at different experimental conditions: the water content in ethanol was varied within the range (0 to 15) mass %, and two equilibrium temperatures were investigated: (298.15 and 313.15) K. It was observed that both variables, water content in ethanol and equilibrium temperature, do not significantly influence the equilibrium behavior. It was also observed that the strong anion-exchange resin (Amberlyst A26 OH) has a good performance in the removal of the fatty acid from the liquid phase. To determine exactly the mechanism for the uptake of oleic acid by the resin, equilibrium experiments were done with different oleic acid concentrations (7, 9, and 11) mass % in solution with water content in ethanol (0.57 ± 0.01) mass % at 298.15 K. In this way the concentration of oleic acid in resin phase was determined, and it was observed than the most important mechanism of uptake is the ion exchange. © 2005 American Chemical Society. 50 5 1529 1534 Gonçalves, C.B., Meirelles, A.J.A., Liquid-liquid equilibrium data for the system palm oil + fatty acids + ethanol + water at 318.2 K (2004) Fluid Phase Equilib., 221, pp. 139-150 Rodrigues, C.E.C., Pessôa Filho, P.A., Meirelles, A.J.A., Phase equilibrium for the system rice bran oil + fatty acids + ethanol + water + γ-oryzanol + tocols (2004) Fluid Phase Equilib., 216, pp. 271-283 Rodrigues, C.E.C., Antoniassi, R., Meirelles, A.J.A., Equilibrium data for the system rice bran oil + fatty acids + ethanol + water at 298.2 K (2003) J. Chem. Eng. Data, 48, pp. 367-373 Gonçalves, C.B., Batista, E., Meirelles, A.J.A., Liquid-liquid equilibrium data for the system corn oil + oleic acid + ethanol + water at 298.15 K (2002) J. Chem. Eng. Data, 47, pp. 416-420 DeJarlais, W.J., Adlof, R.O., Emken, E.A., Acetonitrile as eluent in silver resin column chromatography (1983) J. Am. Oil Chem. Soc., 60, pp. 83-85 Latip, R.A., Baharin, B.S., Che Man, Y.B., Rahman, R.A., Effect of adsorption and solvent extration process on the percentage of carotene extracted from crude palm oil (2001) J. Am. Oil Chem. Soc., 78, pp. 83-85 Adlof, R.O., Emken, E.A., Partial Argentation resin chromatography (PARC): III. the effects of sodium ion incorporation and solvent on the separation of mixture of fatty acids, of fatty esters, and of triglycerides (1981) J. Am. Oil Chem. Soc., 2, pp. 99-101 Ibáñez González, M.J., Rubles Medina, A., Esteban Cerdán, L., Camacho Páez, B., Gimenez Gimenez, A., Molina Grima, E., Adsorption equilibria of fatty acids between methanol/water and reversed phase chromatographyc adsorbents (2001) J. Am. Oil Chem. Soc., 78, pp. 277-283 Miers, J.A.J., Regulation of ion exchange resins for the food, water and beverage industries (1995) React. Polym., 24, pp. 99-107 Utsunomiya, Y., Government regulations on the use of ion exchange resins for the processing of potable water, food products and pharmaceuticals in japan (1995) React. Polym., 24, pp. 121-132 Cao, X., Yun, H.S., Koo, Y., Recovery of L-(+) lactic acid by anion exchange resin Amberlite IRA-400 (2002) Biochem. Eng. J., 11, pp. 189-196 Antonio De Lucas, J.L., Cañizares, P., Rodriguez, J.F., Garcia, I., Potassium removal from water-polyol mixtures by ion exchange on Amberlite 252 (1997) Chem. Eng. J., 66, pp. 137-147 Anasthas, H.M., Gaikar, V.G., Adsorptive separation of alkylphenols using ion exchange resins (1999) React. Fund. Polym., 39, pp. 227-237 Gaikar, V.G., Maiti, O., Adsorptive recovery of naphthenic acids using ion exchange resins (1996) React. Fund. Polym., 31, pp. 155-164 Antonio De Lucas, J.L., Valverde, M.C.R., Gomez, J., Rodríuez, J., Ion exchange equilibria in nonaqueous and mixed solvents on the cationic exchanger Amberlite Ir 120 (2001) J. Chem. Eng. Data, 46, pp. 73-78 (1988) Official Methods and Recommended Practices of the American Oil Chemists' Society, 3rd Ed., pp. 1-2. , AOCS Press: Champaign, IL Altin, O., Ozbelge, H.O., Dogu, T., Use of general purpose adsorption isotherms for heavy metal-clay mineral interactions (1998) J. Colloid Interface Sci., 198, pp. 130-140 Brunauer, S., Deming, L.S., Deming, W.E., Teller, E.J., On a theory of the van der Waals adsorption of gases (1940) J. Am. Chem. Soc., 62 (2), p. 1723