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@ARTICLE{GrafvonWestarp:1052061,
      author       = {Graf von Westarp, William and Hense, Janik and Haas, Moritz
                      and Jupke, Andreas},
      title        = {{R}e-evaluating 2-heptanol as solvent for the extraction of
                      2,3-butanediol from water},
      journal      = {Chemical engineering and processing},
      volume       = {219},
      issn         = {0255-2701},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2026-00732},
      pages        = {110591 -},
      year         = {2026},
      abstract     = {The 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.},
      cin          = {IBG-2},
      ddc          = {660},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {2172 - Utilization of renewable carbon and energy sources
                      and engineering of ecosystem functions (POF4-217) / BioSC -
                      Bioeconomy Science Center (BioSC) / PFExC006 - EXC2186 "The
                      Fuel Science Center" (EXS-PF-PFExC006)},
      pid          = {G:(DE-HGF)POF4-2172 / G:(DE-Juel1)BioSC /
                      G:(DE-82)EXS-PF-PFExC006},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1016/j.cep.2025.110591},
      url          = {https://juser.fz-juelich.de/record/1052061},
}