Deacidification
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Estudo da tecnologia de membrana polimérica aplicada ao processo de degomagem e desacidificação do óleo de farelo de arroz / Study of polymeric membrane technology applied to degumming and deacidification process of rice bran oil
O óleo de farelo de arroz, além de ser utilizado como alimento, é conhecido pelo seu atributo nutricional, devido a sua fração insaponificável rica em antioxidantes como os tocoferóis, tocotrienóis e em especial o ?-orizanol, que dão ao óleo uma maior resistência à oxidação e à deterioração. Além disso, diversos estudos mostram a habilidade
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/03/2012
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2. Desacidificação por via física de óleo de palma : efeito da composição do óleo, das perdas de compostos nutracêuticos e cinéticas de degradação / Physical deacidification of palm oil : effect of oil composition, losses of nutraceutical compounds and reaction kinetics
Os parâmetros ótimos de desodorização (temperatura, porcentagem de vapor e pressão de operação) são determinados de acordo com o tipo de óleo e o processo de refino selecionado. O refino do óleo de palma é realizado preferencialmente através do refino físico, pois sua elevada acidez pode provocar uma perda excessiva de óleo neutro no caso da ut
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/07/2011
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3. The influence of Chromium supplied by tanning and wet finishing processes on the formation of cr(vi) in leather
Chromium used in leather manufacturing can be oxidized from the trivalent to the hexavalent state, causing environmental concerns. In this study, the influence of Cr(III) from tanning, deacidification pH, fatliquors, chrome retanning and vegetable retanning on the formation of Cr(VI) in leather was analyzed by comparing natural and aged samples. In wet-blue
Brazilian Journal of Chemical Engineering. Publicado em: 2011-06
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4. Partition of free fatty acids in deacidification of macaúba (Acrocomia aculeata) pulp oil by liquid-liquid extraction using ethanol/water solution as solvent.
2010
INTERNATIONAL CONFERENCE ON DIFFUSION IN SOLIDS AND LIQUIDS. Publicado em: 2011
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5. Study of physical deacidification of the vegetable oils using model systems / Estudo da desacidificação por via fisica de oleos vegetais utilizando sistemas-modelos
The steam deacidification step must be designed in order to take into account the high difference in the volatility of undesirable compounds and the neutral oil under high temperatures and vacuum, without causing damage to nutraceutical compounds, excessive production of trans fatty acids and neutral oil loss. To improve the process conditions of this import
Publicado em: 2009
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6. Liquid-liquid equilibrium data for the system composed of refined rice bran oil / anhydrous ethanol / water / hexane / Determinação de dados de equilibrio liquido-liquido de sistemas contendo oleo de farelo de arroz refinado / etanol anidro / agua / hexano
The extraction of oil from rice bran aggregates value to the rice production. This oil has nutritional and nutraceutical properties, therefore, the interest of the industries in its use. The oil deacidification can be carried out by liquid¿liquid extraction with lower loss of neutral oil, mainly in the case of oil with high content of free fatty acid. In th
Publicado em: 2009
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7. Desacidificação do OFA atraves do processo de extração liquido-liquido descontinuo utilizando alcoois / Rice poil Brain desacidification in a descontinuous liquid-liquid extraction process using alcohols
The vegetable oil is present in the gastronomy of different cultures,making the food even more attractive to our senses: smell,sight and taste.Besides being an important source of energy it also contains vitamins, nutraceutical compounds and antioxidant liposoluble. Rice brain oil is one of the best vegetable oil, it possesses powerful antioxidant compound t
Publicado em: 2008
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8. Deacidificationof soybean oil by liquid-liquid extraction. / Desacidificação de oleo de soja por extração liquido-liquido.
The deacidification process of soybean oil by continuous liquid-liquid extraction (LLE) was evaluated in a perforated rotating discs contactor column (PRDC). It were studied model-systems formed by refined soybean oil with artificial addition of approximately 2% of commercial linoleic acid. Until the moment, the studies of vegetable oils deacidification by L
Publicado em: 2007
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9. Study About the Potentiality of the Extraction of Natural Products Using Supercritical CO2. / Estudo da Potencialidade da Extração de Produtos Naturais utilizando CO2 Supercrítico.
This study presents a work about different industrial segments that can use extraction with supercritical fluid as one of its stages in this process. Researches were carried out in the pharmaceutical and food development areas so as to evaluate its operation potential, carrying out extractions of substances out of a matrix as, for example, obtaining essentia
Publicado em: 2007
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10. Extraction/fractionation and deacidification of wheat germ oil using supercritical carbon dioxide
Wheat germ oil was obtained by mechanical pressing using a small-scale screw press and by supercritical extraction in a pilot plant. With this last method, different pressures and temperatures were tested and the tocopherol concentration in the extract was monitored during extraction. Then supercritical extracted oil as well as commercial pressed oil were de
Brazilian Journal of Chemical Engineering. Publicado em: 2006-03
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11. Desacidificação de oleos de babaçu e de algodão por extração liquido-liquido. / Babassu and cottonseed oils deacidification by liquid-liquid extraction.
The liquid-liquid extraction was used for babassu and cottonseed oil deacidification. For the babassu oil the study was performed based on the equilibrium data determined for systems containing refined babassu oil + lauric acid + ethanol + water at 30°C, varying the water concentration in the solvent (aqueous ethanol with 0.26; 5.57; 10.45; 20.29; 29.72 mas
Publicado em: 2005
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12. Computational simulation of deodorization and deacidification of vegetable oils. / Simulação computacional de processos de desodorização e desacidificação de oleos vegetais.
This work was developed in order to study through simulation, the processes of deacidification by steam refining and deodorization, present in the vegetable oil industry. The modeling was developed for batch and continuous processes in steady-state and dynamic regime. To describe mass and energy balances, and equilibrium relationships, it was necessary to us
Publicado em: 2005