Energy-Efficient Extraction–Distillation Process for Separating Diluted Acetonitrile–Water Mixture: Rigorous Design with Experimental Verification from Ternary Liquid–Liquid Equilibrium Data

For modeling and simulation of distillation processes, the main information required is the vapour-liquid equilibrium (VLE) data. These are available as discrete values, but for modeling purpose, an analytical function would be more suitable. We developed a simple calculation protocol to obtain a single continuous function for the VLE curve on the entire concentration domain, without using thermodynamic functions. The fitting parameters of binary ethanol-water mixture VLE curve were determined. The methodology is suitable for fitting continuous functions on VLE data of any binary or multicomponent, non-ideal (even azeotropic) mixtures.

Download Full-text

Simulation of Sulfolane Extraction Distillation Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.881-883.324 ◽

2014 ◽

Vol 881-883 ◽

pp. 324-328

Author(s):

De Xin Liu

Keyword(s):

Process Model ◽

Technical Support ◽

Binary Interaction ◽

Distillation Process ◽

Solution Theory ◽

Liquid Equilibrium ◽

Production Processes ◽

Equilibrium Data ◽

Binary Interaction Parameters ◽

Standard Solution

The sulfolane extraction distillation (SED) process is widely applied to separate aromatics and non-aromatics, but it is difficult to build a model for SED because of unknown binary interaction parameters (BIPs). In this study, liquid-liquid equilibrium data are used to regress unknown BIPs, and other unknown BIPs are calculated based on standard solution theory, and then a process model for RIPPs SED is developed. The gap between model results and RIPPs patent is marginal. It is shown that properties method used and process model built in this paper could calculate the SED process correctly and provide theoretical and technical support to the actual production processes.

Download Full-text

Prediction and experimental verification of the effect of salt on the vapour–liquid equilibrium of ethanol/1-propanol/water mixture

Fluid Phase Equilibria ◽

10.1016/j.fluid.2005.05.019 ◽

2005 ◽

Vol 234 (1-2) ◽

pp. 84-93 ◽

Cited By ~ 10

Author(s):

T.C. Tan ◽

Rowell Tan ◽

L.H. Soon ◽

S.H.P. Ong

Keyword(s):

Experimental Verification ◽

Water Mixture ◽

Liquid Equilibrium

Download Full-text

Isothermal and isobaric vapour-liquid equilibrium data in the tetrachloromethane-sec-butyl alcohol system

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19832446 ◽

1983 ◽

Vol 48 (9) ◽

pp. 2446-2453 ◽

Cited By ~ 6

Author(s):

Jan Linek

Keyword(s):

Experimental Data ◽

Boiling Point ◽

Butyl Alcohol ◽

Correlation Equations ◽

Wilson Equation ◽

Liquid Equilibrium ◽

Raoult’S Law ◽

System A ◽

Equilibrium Data ◽

Alcohol System

Isothermal vapour-liquid equilibrium data at 65, 73 and 80 °C and isobaric ones at 101.3 kPa were measured in the tetrachloromethane-sec-butyl alcohol system. A modified circulation still of the Gillespie type was used for the measurements. Under the conditions of measurement, the system exhibits positive deviations from Raoult's law and minimum boiling-point azeotropes. The experimental data were fitted to a number of correlation equations, the most suitable being the Wilson equation.

Download Full-text

Vapour-liquid equilibrium in the ternary system cyclohexane-acetic acid-propionic acid

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19892840 ◽

1989 ◽

Vol 54 (11) ◽

pp. 2840-2847 ◽

Cited By ~ 1

Author(s):

Ivona Malijevská ◽

Alena Maštalková ◽

Marie Sýsová

Keyword(s):

Acetic Acid ◽

Ternary System ◽

Propionic Acid ◽

Activity Coefficients ◽

Error Propagation ◽

Analytical Techniques ◽

Liquid Equilibrium ◽

Consistency Test ◽

Propagation Law ◽

Equilibrium Data

Isobaric equilibrium data (P = 101.3 kPa) for the system cyclohexane-acetic acid-propionic acid have been measured by two different analytical techniques. Activity coefficients calculated by simultaneous solving of equations for the chemical and phase equilibria were subjected to a consistency test based on inaccuracies determined from the error propagation law, and were correlated by Wilson’s equation. The activity coefficients measured were compared with those calculated from binary vapour-liquid equilibrium data and with values predicted by the UNIFAC method.

Download Full-text