Evaluation of the liquid-liquid extraction process with salt addition for organic acid recovery and purification / Avaliação do processo de extração liquido-liquido com a adição de sais para recuperação e purificação de acidos organicos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

This study aims a critical evaluation of the liquid-liquid extraction process of organic acids, produced by fermentation. The organic acids of interest in this work are: citric acid, malic acid, succinic acid and tartaric acid. The study includes the recovery and the purification of the chosen organic acids, the thermodynamic characterization of the systems, thermodynamic modelling and simulation of the liquid-liquid extraction process. The liquid-liquid equilibrium data were obtained at 25oC, and the alcohols, 2-Butanol and n-Butanol were evaluated as extractants, considering the ternary systems and quaternary systems with salting out effect, where the salt MgCl2 was added. The Thermodynamic Modelling of the liquid-liquid equilibrium data, though the group contribution Method (UNIFAC-Larsen) and though Molecular Modelling (NRTL and the so-called electrolytic NRTL), was carried out in some cases considering the presence of strong electrolytes from the salt dissociation in the quaternary systems with salting out effect

ASSUNTO(S)

acidos carboxilicos carboxylic acids extração por solventes thermodynamics equilibrio liquido-liquido liquid-liquid equilibrium termodinamica liquid-liquid extraction

ACESSO AO ARTIGO

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