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Extractive distillation of 2‐methoxy‐2‐methylpropane + ethanol using 1‐butanol as entrainer: Equilibria and simulation
Author(s) -
Arce Alberto,
Rodil Eva,
Soto Ana
Publication year - 1999
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450770608
Subject(s) - uniquac , non random two liquid model , unifac , chemistry , extractive distillation , distillation , azeotropic distillation , isobaric process , ethanol , butanol , chromatography , thermodynamics , activity coefficient , organic chemistry , aqueous solution , physics
Abstract Isobaric (101.32 kPa) liquid‐vapour equilibrium data for the system 1‐butanol + ethanol + 2‐methoxy‐2‐methylpropane (MTBE) were determined and fitted with Wilson, NRTL and UNIQUAC equations, and their prediction by various group contribution methods (ASOG and modified and unmodified UNIFAC methods) was examined. The NRTL equation was used to calculate, by simulation, the influence of plate number and entrainer/feed flow ratio on the quantity and composition of the distillate afforded by extractive distillation of azeotropic MTBE + ethanol using 1‐butanol as the entrainer. The quantity of distillate and its MTBE content both increased with plate number, and the quantity of distillate also increased with entrainer/feed flow rate ratio.