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DESENVOLVIMENTO E PROJETO DE UMA UNIDADE DE EXTRAÇÃO SUPERCRÍTICA PARA PURIFICAÇÃO DE ÓLEOS VEGETAIS

This study examines the method to development of an industrial unity to purification of vegetable oils using extraction with CO2 under supercritical conditions. Aiming at the conception of a commercial plant from laboratory scale, the study must begin through determination of some experimental measurement and a study of energy required in the process. In previous work the optimum conditions (T, P) to purification of vegetable oil by supercritical CO2 were determined. It was possible to deacidify, deodorize e clarify degummed vegetable oils. The step of energy optimization involves a large number of variables in operational conditions seeking to supply suitable data for definition of yield and quality of product, such as the extraction time. The representation of the process in solvent phase diagrams is more convenient to determine the thermodynamics proprieties in each stage of process . The Temperature -Entropy (TxS) diagrams are particular suitable for determination of energy required or removed in a reversible process. After determination of the operational conditions and time to each individual stage, it is possible to plot the variation of pressure and temperature versus time , as well as to define and plan the necessary furnitures to supercritical extraction.

deacidification; supercritical carbon dioxide; vegetable oil


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