Liquid-Liquid Extraction Data- Partial Pressures of Ternary Liquid Systems and the Prediction of Tie Lines

1942 ◽  
Vol 34 (6) ◽  
pp. 696-700 ◽  
Author(s):  
Donald Othmer ◽  
Philip Tobias
Keyword(s):  
Liquid Extraction ◽  
Liquid Liquid Extraction ◽  
Ternary Liquid Systems ◽  
Partial Pressures ◽  
Liquid Systems ◽  
Tie Lines

scholarly journals Liquid-Liquid Extraction in Systems Containing Butanol and Ionic Liquids – A Review

2017 ◽  
Vol 38 (1) ◽  
pp. 97-110 ◽  
Author(s):  
Artur Kubiczek ◽  
Władysław Kamiński
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Liquid Extraction ◽  
Butanol Production ◽  
Model Liquid ◽  
New Class ◽  
Liquid Liquid Extraction ◽  
Liquid Systems ◽  
Nrtl Equation ◽  
Equilibrium Data

AbstractRoom-temperature ionic liquids (RTILs) are a moderately new class of liquid substances that are characterized by a great variety of possible anion-cation combinations giving each of them different properties. For this reason, they have been termed as designer solvents and, as such, they are particularly promising for liquid-liquid extraction, which has been quite intensely studied over the last decade. This paper concentrates on the recent liquid-liquid extraction studies involving ionic liquids, yet focusing strictly on the separation of n-butanol from model aqueous solutions. Such research is undertaken mainly with the intention of facilitating biological butanol production, which is usually carried out through the ABE fermentation process. So far, various sorts of RTILs have been tested for this purpose while mostly ternary liquid-liquid systems have been investigated. The industrial design of liquid-liquid extraction requires prior knowledge of the state of thermodynamic equilibrium and its relation to the process parameters. Such knowledge can be obtained by performing a series of extraction experiments and employing a certain mathematical model to approximate the equilibrium. There are at least a few models available but this paper concentrates primarily on the NRTL equation, which has proven to be one of the most accurate tools for correlating experimental equilibrium data. Thus, all the presented studies have been selected based on the accepted modeling method. The reader is also shown how the NRTL equation can be used to model liquid-liquid systems containing more than three components as it has been the authors’ recent area of expertise.

scholarly journals Application of a ternary phase diagram to the liquid-liquid extraction of ethanoic acid using ethyl ethanoate

2019 ◽  
Vol 44 (3) ◽  
pp. 43-49
Author(s):  
Aline Amaral Madeira
Keyword(s):  
Phase Diagram ◽  
Ternary Phase ◽  
Ternary Phase Diagram ◽  
Extraction Process ◽  
Distribution Coefficients ◽  
Liquid Extraction ◽  
Ethanoic Acid ◽  
Liquid Liquid Extraction ◽  
Equilibrium Data ◽  
Tie Lines

This article was elaborated in an approach to the liquid-liquid equilibrium of the extraction process of ethanoic acid (C2H4O2) in aqueous phase using ethyl ethanoate as solvent. The liquid-liquid extraction was modeled by the construction of a ternary phase diagram for the water-ethanoic acid- ethyl ethanoate system with the aid of the Origin software. The equilibrium data were obtained experimentally by titration at room temperature (298.15 K) and atmospheric pressure (101325 Pa) using four mixtures of water, ethanoic acid, and ethyl ethanoate. The determination of the composition of the extract and residue portions in the equilibrium of each mixture by of the tie-lines method allowed to examine the percentages of liquid-liquid extraction achieved. The distribution coefficients and separation factors calculated made it possible an evaluation of the distribution and of the mutual solubility of the solute in the aqueous and organic phases. The results showed a good performance of ethyl ethanoate in the extraction of ethanoic acid for concentrations of solute until 16% of the feed.

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