Reactive Extraction of Levulinic Acid from Aqueous Solutions Using Trioctylamine with Diluents 2-Ethyl-1-hexanol, 4-Methylpentan-2-one, and Isoamyl Alcohol
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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7
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Journal of Chemical and Engineering Data, Volume 69, issue 10, pp. 3566–3572
Abstract
Separating carboxylic acids from aqueous solutions is a challenge, and reactive extraction has been examined as an attractive alternative. This study investigates the reactive extraction of levulinic acid (LA) using trioctylamine (TOA) in various diluents, such as 2-ethyl-1-hexanol, 4-methylpentan-2-one (MIBK), and isoamyl alcohol. For this purpose, liquid-liquid equilibrium (LLE) data was experimentally obtained for the mix of LA + TOA + H2O + diluents at T = 293.15 K and atmospheric pressure. From the obtained data, the ability of various TOA/diluent mixtures was evaluated in terms of distribution coefficient (KD). Isoamyl alcohol was found to be an effective diluent at the diluted region (wLAaq < 0.1) with a KD value of 9.4. However, increasing the concentration of LA resulted in approximately the same extraction ability as the other tested diluents with TOA. Furthermore, the nonrandom two-liquid (NRTL) excess Gibbs energy model was applied to correlate the tie lines. The root-mean-square deviations (RMSD) in liquid mass fraction obtained with the NRTL model for the experimental data of the above-mentioned different LLE systems of 2-ethyl-1-hexanol, MIBK, and isoamyl alcohol were 0.013, 0.018, and 0.016, respectively. Additionally, the KD values of the systems were also computed.Description
Publisher Copyright: © 2023 The Authors. Published by American Chemical Society.
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Asadzadeh, B, Saad, M, Uusi-Kyyny, P & Alopaeus, V 2024, 'Reactive Extraction of Levulinic Acid from Aqueous Solutions Using Trioctylamine with Diluents 2-Ethyl-1-hexanol, 4-Methylpentan-2-one, and Isoamyl Alcohol', Journal of Chemical and Engineering Data, vol. 69, no. 10, pp. 3566–3572. https://doi.org/10.1021/acs.jced.3c00309