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Review of Extractive Distillation. Process design, operation optimization and control

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Academic year: 2021

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Figure

Fig. 1 – Typical flowsheets for the extractive distillation process. (a) Continuous direct split with a heavy entrainer (b) continuous indirect split with a light entrainer
Fig. 4b shows also the isoselectivity S = cstant diagram. In the composition’s areas where S> 1, separating agent  consump-tions and relative volatility change in the same way, whilst for fields with S < 1 an increase in entrainer consumptions leads t
Fig. 4 – Diagrams of excess Gibbs energy isolines (J/mol) (a) and isoselectivity plots (b) at 101.3 kPa for ethanol–water–ethylene glycol mixture
Fig. 5 – Influence of reflux and entrainer–feed flow rate ratios on the extractive section composition profile map for the class 1.0–1a diagrams (adapted with permission from Rodríguez-Donis et al
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