Liquid−Liquid Equilibrium of Potassium Phosphate/Potassium Citrate/Sodium Citrate + Ethanol Aqueous Two-Phase Systems at (298.15 and 313.15) K and Correlation

2010 ◽  
Vol 55 (12) ◽  
pp. 5621-5626 ◽  
Author(s):  
Yun Wang ◽  
Yanli Mao ◽  
Juan Han ◽  
Yan Liu ◽  
Yongsheng Yan
Keyword(s):  
Sodium Citrate ◽  
Potassium Phosphate ◽  
Potassium Citrate ◽  
Liquid Equilibrium ◽  
Two Phase ◽  
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.

Measurements and Modeling of Liquid–Liquid Equilibrium of Polyethylene Glycol 400, Sodium Phosphate, or Sodium Citrate Aqueous Two-Phase Systems at (298.2, 308.2, and 318.2) K

2013 ◽  
Vol 58 (7) ◽  
pp. 2008-2017 ◽  
Author(s):  
Evaldo Cardozo de Souza ◽  
Renata Silva Diniz ◽  
Jane Sélia dos Reis Coimbra ◽  
Maurício de Oliveira Leite ◽  
Geormenny Rocha dos Santos ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Sodium Phosphate ◽  
Sodium Citrate ◽  
Liquid Equilibrium ◽  
Two Phase ◽  
Polyethylene Glycol 400 ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

scholarly journals Influence of the temperature and type of salt on the phase equilibrium of peg 1500 + potassium phosphate and peg 1500 + sodium citrate aqueous two-phase systems

Química Nova ◽  
2008 ◽  
Vol 31 (2) ◽  
pp. 209-213 ◽  
Author(s):  
Carolina P. Carvalho ◽  
Jane Sélia R. Coimbra ◽  
Isabele Andressa F. Costa ◽  
Luis Antonio Minim ◽  
Maria Cristina Maffia ◽  
...  
Keyword(s):  
Phase Equilibrium ◽  
Sodium Citrate ◽  
Potassium Phosphate ◽  
Two Phase ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

scholarly journals Separation of phenyl acetic acid and 6-aminopenicillanic acid applying aqueous two-phase systems based on copolymers and salts

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Farzaneh Ghazizadeh Ahsaie ◽  
Gholamreza Pazuki
Keyword(s):  
Acetic Acid ◽  
Potassium Phosphate ◽  
Phase Region ◽  
Potassium Citrate ◽  
Sodium Sulphate ◽  
Penicillin G ◽  
Phenyl Acetic Acid ◽  
Two Phase ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

Abstract6-Aminopenicillanic acid (6-APA) is used for synthesis of semisynthetic antibiotics. Polymer-salt aqueous two-phase systems (ATPSs) were applied for separation of 6-APA and phenyl acetic acid (PAA), as the products of hydrolyzation reaction of Penicillin G/Penicillin V. The binodal curves of ATPS composed of a copolymer (reverse Pluronic 10R5, Pluronic L35 and PEG-ran-PPG) and a salt (Tri-sodium citrate, tri-potassium citrate, di-potassium phosphate, sodium sulphate and magnesium sulphate) were obtained. The results show that, at a fixed PPG/PEG ratio, block copolymers have larger two-phase region compared with random copolymer. After screening on the partition coefficient of PAA and 6-APA separately, Na2SO4 was selected for studying the effect of the copolymer structure and the composition of salt and copolymer on partitioning, considering higher selectivity of PAA and 6-APA. 10R5-Na2SO4 ATPS was selected as the most appropriate system for separation of 6-APA and PAA. This system was used for separation of mixture of 6-APA and PAA. The results show that selectivity was $$\approx$$ ≈ 53 and smaller in a system, containing a mixture of 6-APA and PAA. This observation can be justified by the interaction between 6-APA and PAA. Molecular interaction between these two molecules were investigated by the Flory–Huggins interaction parameter.

scholarly journals Separation of Phenyl Acetic Acid and 6-Aminopenicillanic Acid Applying Aqueous Two-Phase Systems Based on Copolymers and Salts

2020 ◽  
Author(s):  
Farzaneh Ghazizadeh Ahsaie ◽  
Gholamreza Pazuki
Keyword(s):  
Acetic Acid ◽  
Potassium Phosphate ◽  
Phase Region ◽  
Potassium Citrate ◽  
Sodium Sulphate ◽  
Penicillin G ◽  
Phenyl Acetic Acid ◽  
Two Phase ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

Abstract 6-Aminopenicillanic acid (6-APA) is used for synthesis of semisynthetic antibiotics. Polymer-salt aqueous two-phase systems (ATPSs) were applied for separation of 6-aminopenicillanic acid (6-APA) and phenyl acetic acid (PAA), as the products of hydrolyzation reaction of Penicillin G / Penicillin V. The binodal curves of ATPS composed of a copolymer (reverse Pluronic 10R5, Pluronic L35 and PEG-ran-PPG) and a salt (Tri-sodium citrate, tri-potassium citrate, di-potassium phosphate, sodium sulphate and magnesium sulphate) were obtained. The results show that, at a fixed PPG/PEG ratio, block copolymers have larger two-phase region compared with random copolymer. After screening on the partition coefficient of PAA and 6-APA separately, Na2SO4 was selected for studying the effect of the copolymer structure and the composition of salt and copolymer on partitioning, considering higher selectivity of PAA and 6-APA. 10R5-Na2SO4 ATPS was selected as the most appropriate system for separation of 6-APA and PAA. This system was used for separation of mixture of 6-APA and PAA. The results show that selectivity was 53 and smaller in a system, containing a mixture of 6-APA and PAA. This observation can be justified by the interaction between 6-APA and PAA. Molecular interaction between these two molecules were investigated by the Flory-Huggins interaction parameter.

scholarly journals Liquid–liquid equilibrium of the Ucon 50-HB5100/sodium citrate aqueous two-phase systems

2009 ◽  
Vol 65 (1) ◽  
pp. 3-8 ◽  
Author(s):  
Gisela Tubio ◽  
Bibiana B. Nerli ◽  
Guillermo A. Picó ◽  
Armando Venâncio ◽  
José Teixeira
Keyword(s):  
Sodium Citrate ◽  
Liquid Equilibrium ◽  
Two Phase ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

scholarly journals Development and Evaluation of Environmentally Benign Aqueous Two Phase Systems for the Recovery of Proteins from Tannery Waste Water

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Selvaraj Raja ◽  
Vytla Ramachandra Murty
Keyword(s):  
Waste Water ◽  
Sodium Citrate ◽  
Potassium Citrate ◽  
Ammonium Citrate ◽  
Bottom Phase ◽  
Two Phase ◽  
Tannery Waste ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Tannery Waste Water

Aqueous two phase systems (ATPSs) containing high molecular weight polyethylene glycol, PEG (10000), and completely biodegradable citrate salts (sodium citrate, potassium citrate, and ammonium citrate) with water were developed to recover the waste water proteins from a model tannery waste water system. The variations in the phase diagram were explained on the basis of ionic radius of cations, Gibbs free energy of hydration (ΔGhydation) of cations, and effective excluded volume (EEV) of salts. The salting-out capability of the cations followed the sequence: Sodium citrate > Potassium citrate > Ammonium citrate. Setschenow-type equations were used to correlate tie-line compositions. During partitioning studies, recovery of tannery waste water proteins in PEG 10000 + Sodium citrate ATPS was found superior to other systems. It was possible to recover 95.86% of proteins from tannery waste water in the bottom phase with PEG 10000 30% (w/w) + Sodium citrate 13% (w/w) at 30°C. The partition coefficients were correlated with the salt compositions by a quadratic equation and the coefficients were calculated.

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