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Type: Artigo de periódico
Title: (Liquid plus liquid) equilibria in {water plus acrylic acid + (1-butanol, or 2-butanol, or 1-pentanol)} systems at T=293.2 K, T=303.2 K, and T=313.2 K and atmospheric pressure
Author: Batistell, MC
Alves, TC
Guadagnini, TR
de Oliveira, LH
Aznar, M
Abstract: (Liquid + liquid) equilibrium (LLE) data for (water + acrylic acid + (1-butanol, or 2-butanol, or 1-pentanol)) at T = 293.2 K, T = 303.2 K, and T = 313.2 K and atmospheric pressure (approximate to 95 kPa) were determined by Karl Fischer titration and densimetry. All systems present type I binodal curves. The size of immiscibility region changes little with an increase in temperature, but increases according to the solvent, following the order: 2-butanol < 1-butanol < 1-pentanol. Values of solute distribution and solvent selectivities show that 1-pentanol is a better solvent than 1-butanol or 2-butanol for acrylic acid removal from water solutions. Quality of data was ascertain by Hand and Othmer-Tobias equations, giving R(2) > 0.916, mass balance and accordance between tie lines and cloud points. The NRTL model was used to correlate experimental data, by estimating new energy parameters, with root mean square deviations below 0.0053 for all systems. (C) 2011 Elsevier Ltd. All rights reserved.
Subject: (Liquid plus liquid) equilibrium
Acrylic acid
Experimental data
Country: Inglaterra
Editor: Academic Press Ltd- Elsevier Science Ltd
Rights: fechado
Identifier DOI: 10.1016/j.jct.2011.04.009
Date Issue: 2011
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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