Equilibrio de fases em sistemas compostos por triacilglicerois / acidos graxos / etanol hidratado

AUTOR(ES)
DATA DE PUBLICAÇÃO

2002

RESUMO

Vegetable oils contain some components that must be removed during the refining process such as: free fatty acids, phosphatides and metal traces. Free fatty acids are removed by chemical refining or physical refining. The first process is very versatile and applicable for ali raw materiais, but for high acidic oils, great loss of neutral oil may occur. In such case, physical refining can be used but the finished product is subject to undesirable alterations in color and reduction of stability to oxidation. Liquid-liquid extraction has being studied as an altenative route for the deacidification of vegetable oils. The advantages are: reduction of energy consumption and less loss of neutral oil. For the study and development of an industrial equipament to make the deacidification by liquid-liquid extraction, the knowlegdge of phase equilibria is essential. The aim of this present work is to determine experimental data for liquid-liquid equilibria in systems containing triacilglycerols, fatty acids, ethanol and water using glass cell maintained at constant temperature. UNIFAC group interaction parameters were adjusted to those experimental data and used predict more complex systems

ASSUNTO(S)

oleos e gorduras acidos graxos equilibrio liquido-liquido

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