Abstract
The current study is focused on the reactive extraction of gallic acid from aqueous solution using tri-n-octylamine (TOA) and tri-n-butyl phosphate (TBP) as extractants dissolved in four different diluents (4-methylpentan-2-one, kerosene, octane-1-ol, and decane) at 298 ± 1 K and 101.325 ± 1 kPa. A mathematical model for mass action law is used for estimation of equilibrium parameters and stoichiometric coefficients. The extraction results were interpreted as distribution coefficient (KD) and degree of extraction (E). The solvent’s ability to extract acid is observed as MIBK > octane-1-ol > n-decane > kerosene and MIBK > n-decane ≥ kerosene > octane-1-ol with TOA and TBP, respectively. On basis of extraction capabilities, TOA with active diluents and TBP with inactive diluents are found suitable for recovery of gallic acid from aqueous solution/fermentation broth. The feasibility of the extraction process for a counter current reactive liquid extraction column is assessed by calculating design parameters ...
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