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001052061 1001_ $$00000-0002-6137-8942$$aGraf von Westarp, William$$b0
001052061 245__ $$aRe-evaluating 2-heptanol as solvent for the extraction of 2,3-butanediol from water
001052061 260__ $$aAmsterdam [u.a.]$$bElsevier$$c2026
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001052061 520__ $$aThe performance of an extraction-distillation process for separating 2,3-butanediol from H2O was evaluated in a recent study, finding high efficeincy when using 2-heptanol as solvent for extraction. Since the study was based on liquid-liquid equilibrium (LLE) data mainly derived from molecular simulations, the aim of this communication was to consolidate the database by providing experimental phase equilibrium data and to re-evaluate 2-heptanol as solvent. Based on LLE experiments, a solvent-to-feed ratio (S/F) of 3.175 was required to recover 95 % of 2,3-BDO in a counter-current extraction column. This S/F is 21.9 times higher than the estimation derived from the data based on molecular simulations. The high S/F results in a strong dilution of 2,3-BDO in the extract. Experimental investigation of the boiling point data of the 2,3-BDO – 2-heptanol system for subsequent distillation revealed the presence of a temperature minimum azeotrope at low 2,3-BDO concentrations, which limits the feasibility of the overall process. Since the use of 2-heptanol as solvent is oftentimes referred to in the community of diol separation, the results presented in the work at hand are relevant to a broad readership.
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001052061 588__ $$aDataset connected to CrossRef, Journals: juser.fz-juelich.de
001052061 7001_ $$00000-0003-1570-6914$$aHense, Janik$$b1
001052061 7001_ $$00000-0001-8610-1328$$aHaas, Moritz$$b2
001052061 7001_ $$0P:(DE-Juel1)194474$$aJupke, Andreas$$b3$$eCorresponding author
001052061 773__ $$0PERI:(DE-600)2013149-5$$a10.1016/j.cep.2025.110591$$gVol. 219, p. 110591 -$$p110591 -$$tChemical engineering and processing$$v219$$x0255-2701$$y2026
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