Akademik Veri Yönetim Sistemi
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING, cilt.40, sa.4, ss.1171-1181, 2023 (SCI-Expanded)
This paper investigates the reactive extraction of gallic acid (HGA) by trioctlyphosphine oxide (TOPO) in different kinds of solvents. The physical extraction studies only with conventional solvents have been carried out to understand the effect of extractant TOPO. The reactive extraction results have been evaluated in terms of the extraction efficiency, the distribution coefficient, and the loading factor. TOPO gave the highest extraction efficiency of 92% in the presence of oleyl alcohol, followed by dimethyl adipate and n-hexane. The complexation constants were estimated by the mass action law model. The model results demonstrated a realistic agreement with the experimental results. The solvent toxicity towards microorganisms has been discussed with solvent lipophilicity (log(10) P-a). The number of theoretical units (NTU) and the actual solvent to feed (S/F) ratio were calculated from the experimental outcomes for further design of a liquid-liquid reactive extraction column. A thermodynamic study was executed at varied temperatures to estimate the enthalpy, entropy and free Gibbs energy change of the reaction. Lastly, HGA diffusivities into solvents were calculated by Wilke-Chang and Reddy-Doraiswamy equations. This study provides a detailed investigation on the reactive extraction of HGA by TOPO, and may be useful for its design and development.