Aqueous two-phase systems of polyoxyethylene lauryl ether and potassium gluconate/potassium oxalate/potassium citrate at different temperature-experimental results and modeling of (liquid+liquid) equilibrium data

2014 ◽  
Vol 71 ◽  
pp. 137-147 ◽  
Author(s):  
Yang Lu ◽  
Tongfan Hao ◽  
Yan Zhou ◽  
Juan Han ◽  
Zhenjiang Tan ◽  
...  
Keyword(s):  
Potassium Citrate ◽  
Potassium Oxalate ◽  
Liquid Equilibrium ◽  
Two Phase ◽  
Potassium Gluconate ◽  
Lauryl Ether ◽  
Equilibrium Data ◽  
Aqueous Two Phase Systems ◽  
Polyoxyethylene Lauryl Ether ◽  
Phase Systems

Liquid−Liquid Equilibrium Data for Aqueous Two-Phase Systems Composed of Ethylene Oxide Propylene Oxide Copolymers

2011 ◽  
Vol 56 (2) ◽  
pp. 190-194 ◽  
Author(s):  
Kelany S. Nascimento ◽  
Sonia Yelo ◽  
Benildo S. Cavada ◽  
Ana M. Azevedo ◽  
Maria R. Aires-Barros
Keyword(s):  
Ethylene Oxide ◽  
Propylene Oxide ◽  
Liquid Equilibrium ◽  
Two Phase ◽  
Equilibrium Data ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

Liquid-Liquid Equilibria for Acetone + Several Citrates Aqueous Two-Phase Systems at Different Temperatures

2012 ◽  
Vol 549 ◽  
pp. 30-35
Author(s):  
Shi Ping Hu ◽  
Juan Han ◽  
Yong Sheng Yan ◽  
Yu Tao Hu
Keyword(s):  
Ternary Systems ◽  
Data Fitting ◽  
Potassium Citrate ◽  
Liquid Equilibrium ◽  
Two Phase ◽  
Different Temperatures ◽  
Tie Lines ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Tie Line

Liquid-liquid equilibria for the three kinds of the ternary systems acetone + ammonium, sodium or potassium citrate + water have been determined at T= (273.15, 283.15, and 298.15) K. Binodal curves, tie-lines, and integrated phase diagrams for the ternary systems are given. The data of the experimental bimodal curve are described with a four-parameter equation. The result also shows the temperature has little influence on the liquid-liquid equilibrium within the investigated range. The tie-line data calculated according to the bimodal data fitting equation and the lever arm rule were satisfactorily described by using the Othmer-Tobias and Bancroft equations, and the result conform the reliability of the calculation method and corresponding tie-line data.

scholarly journals Liquid-Liquid Equilibrium Data for the Ionic Liquid N-Ethyl-Pyridinium Bromide with Several Sodium Salts and Potassium Salts

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Yuliang Li ◽  
Xiaojia Lu ◽  
Jing Hao ◽  
Changquan Chen
Keyword(s):  
Correlation Coefficients ◽  
Liquid Equilibrium ◽  
Two Phase ◽  
Salting Out ◽  
Pyridinium Bromide ◽  
Equilibrium Data ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Lle Data ◽  
Tie Line

The liquid-liquid equilibrium (LLE) data for systems containing N-ethyl-pyridinium bromide ([EPy]Br), salt (Na2HPO4,K2HPO4,K2SO4,C4O6H4KNa), and water have been measured experimentally atT=298.15 K and the formations of these four aqueous two-phase systems (ATPSs) have been discussed. Also, the effective excluded volume (EEV) values obtained from the binodal models for the four systems were determined and the salting-out abilities of different salts follow the order ofK2SO4>K2HPO4>Na2HPO4>C4O6H4KNa. The solubility data were correlated by the Merchuk and other equations while the tie-line data by the Othmer-Tobias, Bancroft, two-parameter, and Setschenow-type equations. The correlation coefficients evidenced that experimental data fitted well to all these equations. These four salts were proved successfully to form ATPSs with N-ethyl-pyridinium bromide, making a significant contribution to the further study of this kind of ATPS.

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