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    Statistical modeling and optimization of itaconic acid reactive extraction using response surface methodology (RSM) and artificial neural network (ANN)
    (Elsevier, 2022) Chellapan, Suchith; Datta, Dipaloy; Kumar, Sushil; Uslu, Hasan
    In this paper, regression models were proposed to predict the degrees of extraction (%Y) for the reactive extraction of itaconic acid using response surface methodology (RSM) and artificial neural network (ANN). The prominent design parameters like itaconic acid concentration, extractant (tri-n-octylamine), and modifier (dichloromethane, an active diluent) composition were considered, and their impact on the extraction efficiency was determined. RSM and ANN fitted the experimental data with a correlation coefficient of 0.970 and 0.993, respectively. The statistical significance of the models (RSM and ANN) was ascertained by ANOVA analysis. The optimal design factors were determined to be 0.072 mol center dot L-1 acid concentration, 16.075 %v/v extractant composition, and 62.15 %v/v modifier composition at which the values of experimental and predicted %Y of 98.86% and 100.69%, respectively, were obtained by RSM model.
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    Study on the Biocompatible Solvent Systems for the Reactive Extraction of Itaconic Acid
    (Amer Chemical Soc, 2019) Datta, Dipaloy; Chomal, Neha; Uslu, Hasan; Kumar, Sushil
    The separation of itaconic acid (0.2 mmol-kg(-1)) from its aqueous solution is performed by dissolving tri-n-octylamine (TOA) in the biocompatible mixtures of 1-decanol + n-dodecane, dodecanol + n-dodecane, and oleyl alcohol + n-dodecane at different compositions. Also, the physical extraction data are presented with dodecane, oleyl alcohol, dodecanol, and 1-decanol. Here, fixing the TOA composition at 20 vol %, the vol % of modifiers (oleyl alcohol, dodecanol, and 1-decanol) is changed from 20 to 60 vol % in dodecane (diluent) to find the best combination for the extraction of the acid. The extraction system comprised of 20 vol % TOA + 40 vol % dodecanol + 20 vol % n-dodecane gives the best separation efficiency (95.06%). Then, with this solvent system, equilibrium studies are carried out at different acid concentrations (0.05 and 0.251 mmol.kg(-1)). Based on the theoretical study, the insights of the extraction mechanism are determined in terms of equilibrium constants (overall and individual, K-E, K-11, and K-21) and stoichiometry (m and n) at 298 K.