Isobaric vapour–liquid equilibrium measurements and extractive distillation process for the azeotrope of (N,N-dimethylisopropylamine + acetone)

Add time:08/24/2019    Source:sciencedirect.com

In this work, N,N-dimethylacetamide (DMAC) and furfural were selected as solvents to separate the mixture of (N,N-dimethylisopropylamine (DMIP) + acetone) by extractive distillation. The isobaric vapour–liquid equilibrium (VLE) data for the binary systems of (DMIP + acetone), (DMIP + DMAC), (DMIP + furfural) and (acetone + furfural) were measured at 101.3 kPa by a modified Rose vapour recirculating type equilibrium still. Two thermodynamic consistency tests of Herington and Van Ness were employed to check the experimental data for all the binary systems, respectively. The measured VLE data were correlated by NRTL, UNIQUAC and Wilson models. The calculated results show that the UNIQUAC model is best-fitted to correlate the measured VLE data for the four binary systems. Furthermore, extractive distillation process for separating the azeotrope of DMIP and acetone was studied in this paper.

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