Artículos de revistas
Optimisation Of The Acidulation Process Of Soapstock From The Neutralisation Of Rice Bran Oil [optimización Del Proceso De Acidulación De La Borra De Neutralización De Aceite De Salvado De Arroz]
Registro en:
Grasas Y Aceites. , v. 55, n. 2, p. 155 - 159, 2004.
173495
2-s2.0-14944350939
Autor
Scavariello E.M.S.
Barrera-Arellano D.
Institución
Resumen
Soapstock from the neutralisation of rice bran oil was characterised through the most important parameters with direct influence on the acidulation process. A central composite rotational experimental design of two levels was used. The responses of the trials were γ-oryzanol concentration in the acid oil and process time necessary for total hydrolysis of the soaps present. The optimal process conditions were determined using the response surface methodology. Adjustments were made to second order mathematical models and validity was verified by analysis of variance using the STATISTICA program. The process variables studied were: molar ratio - sulphuric acid/soaps (0.55-0.95) and process temperature (70-100°C). The results indicated that the process temperature does not significantly interfere in the concentration of γ-oryzanol of the acid oil, but it does affect process time. In the different concentrations of sulphuric acid added, represented by the molar ratio of sulphuric acid/soaps, the concentration of γ-oryzanol varied between 3.13 and 3.74%. Through the superposition of the areas of the response surface contour curves the optimal process parameters were determined: process temperature of 95°C and molar ratio of sulphuric acid/soaps of 0.74, resulting in a γ-oryzanol concentration of 3.64% and a process time of 90 minutes. 55 2 155 159 (1996) "Official Methods and Recommended Practices of the American Oil Chemists Society", 3. Ed., , Champaign Barros-Neto, B., Scarminio, I.S., Bruns, R.E., (1996) Planejamento e Otimização de Experimentos. 2a Ed., , Editora da UNICAMP, Campinas, SP, Brasil Box, G.E.P., Hunter, W.G., Hunter, J.S., (1978) Statistics for Experiments - An Introduction to Design, Data Analysis and Model Building, , Wiley & Sons, New York Down, M.K., Gas chromatographic characterization of soapstocks from vegetable oil refining (1998) J. Chromatography, 816, pp. 185-193 Kano, T., Shibayama, Y., Tamura, N., (1995), Stabilization of aqueous γ-oryzanol solutions". Patent JP 07258165Kato, Y., Samura, K., Kawamura, M., Osawa, S., (1996), Compositions containing γ-oryzanol and/or soybean unsaponified products". Patent JP 08295627Khuri, A.I., Cornell, J.A., (1987) Response Surface-designs and Analyses, , Marcel Dekker, Inc., New York Orthoefer, F.T., Rice bran oil: Healthy lipid source (1996) Food Technol., 50, pp. 62-64 Rogers, E.J., Rice, S.M., Nicolosi, R.J., Carpenter, D.R., Mc Clelland, C.A., Romanczyk, L.J., Identification and quantitation of γ-oryzanol components and simultaneous assessment of tocols in rice bran oil (1993) J. Am. Oil Chem. Soc., 70, pp. 301-307 Swern, D., Refining and bleaching (1982) Bailey's Industrial Oil and Fat Products, p. 4. , D.Swern (Ed). J. Wiley & Sons, New York (1995) γ-oryzanol, a Naturally Derived Food Antioxidant, p. 8. , Wakayama, Japan Watson, K.S., Hoefer, M., Use or disposal of by-products and spent material from the vegetable oil processing industry in the U.S. (1976) J. Am. Oil Chem. Soc., 53, pp. 437-442 Woerfel, J.B., Processing and utilization of by -products from soy oil processing (1981) J. Am. Oil Chem. Soc., 58, pp. 188-191 Woerfel, J.B., Alternatives for processing of soapstock (1983) J. Am. Oil Chem. Soc., 60, pp. 262A-265A Woerfel, J.B., Soybean oil processing byproducts and their utilization (1995) Practical Handbook of Soybean Processing and Utilization, , D.R. Erickson (Ed). AOCS Press, Champaign