Saad Mohammed, Asadzadeh Behnaz, Uusi-Kyyny Petri, Alopaeus Ville
Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, P.O. Box 11000, Aalto, 00076, Finland.
Sci Rep. 2024 Sep 27;14(1):22389. doi: 10.1038/s41598-024-72881-3.
This paper focuses on the reactive extraction of levulinic acid (LA) from aqueous solution by reactive extraction. This goal is achieved using eugenol, a green alternative in the industry, as a solvent in the liquid-liquid equilibrium (LLE) measurements for the ternary system of LA + Eugenol + HO and quaternary systems of LA + Eugenol/ Methanol (MeOH) + HO + Tri-n-octylamine (TOA) at T = 293.15 K. Additionally, the distribution coefficients (K) were calculated for LA using the two diluents. Also, the ability of different diluents with TOA, in the extraction of LA were compared. The distribution coefficient of eugenol with TOA (K = 9.44) is compared with other organic diluents which indicated that eugenol is a suitable option. MeOH, being the shortest chain alcohol, also turned out to be a diluent that could be utilized for extraction of LA with TOA. Furthermore, the Non-Random Two-Liquid (NRTL) excess Gibbs energy model was applied to correlate the measured phase equilibria. The obtained parameters were further validated using a decanter model.
本文重点研究了通过反应萃取从水溶液中反应萃取乙酰丙酸（LA）。该目标是通过使用丁香酚（一种工业上的绿色替代品）作为溶剂，在293.15 K下对LA +丁香酚+ H₂O的三元体系以及LA +丁香酚/甲醇（MeOH）+ H₂O +三正辛胺（TOA）的四元体系进行液-液平衡（LLE）测量来实现的。此外，使用这两种稀释剂计算了LA的分配系数（K）。同时，比较了不同稀释剂与TOA在萃取LA方面的能力。将丁香酚与TOA的分配系数（K = 9.44）与其他有机稀释剂进行了比较，结果表明丁香酚是一个合适的选择。甲醇作为最短链的醇，也被证明是一种可用于与TOA萃取LA的稀释剂。此外，应用非随机双液（NRTL）过量吉布斯自由能模型来关联测得的相平衡。使用倾析器模型对获得的参数进行了进一步验证。
