EXTRAÇÃO POR SOLVENTE DE ÁCIDO CÍTRICO EM UMA COLUNA MECANICAMENTE AGITADA
EXTRAÇÃO POR SOLVENTE DE ÁCIDO CÍTRICO EM UMA COLUNA MECANICAMENTE AGITADA
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DOI: https://doi.org/10.22533/at.ed.9142422035
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Palavras-chave: ácido cítrico; coluna mecanicamente agitada; extração líquido- líquido
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Keywords: citric acid; mechanically agitated column; solvent extraction
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Abstract: ABSTRACT: The present work evaluated the continuous solvent extraction of citric acid in a mechanically agitated column (Kühni type, 60 mm internal diameter) with 20 stages. The aqueous phase was a synthetic solution of citric acid (pH = 1.5) with the typical concentration of industrial fermented musts (10% w/v). The solvent used was composed of the extractant Alamine ® 336 (30% w/v), a tertiary amine; the modifier Exxal ™ 13 tridecyl alcohol (10% w/v); and the diluent Escaid TM 110. Through pilot scale experiments, different volumetric flow rates ratios between the organic and aqueous phases (F d /F c of 1/3, 2/2, and 3/1) were investigated. Therefore, concentration profiles in both phases along the column, operating in steady state, were obtained and hold up and slip velocity were calculated. The better extraction condition was to F d /F c of 2/2, because of the high extraction (85%) and high extract concentration 9.1 % w/w of citric acid.
- Estêvão Magno Rodrigues Araújo
- Fabrício Eduardo Bortot Coelho
- Cibele Konzen
- Julio Cézar Balarini
- Tânia Lúcia Santos Miranda
- Adriane Salum