Phase separation in aqueous systems for realizing virtually significant extractions

Chakraborty, Arabinda; Sen, Kamalika

doi:10.1039/c4ra06798c

Cited by 19 publications

(15 citation statements)

References 29 publications

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“…The binodal data of polymer–salt ATPSs was correlated by the third-order polynomial equation (eq ), and the equation analogue effect was good. Equation was widely used to fit the binodal curves of many ATPSs. ,,,− In this work, the experimental binodal data of three ATPSs were regressed and analyzed by computer and the fitting parameters a , b , c , and d of three euqations were given in Tables – , where the square of correlation coefficients ( R 2 ) and the corresponding standard deviations (sd) were also shown. It was found that eq has a higher goodness-of-fit than the other two equations by comparison of the correlation coefficients and standard deviations given in three tables.…”

Section: Resultsmentioning

confidence: 99%

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Yang

Sun

et al. 2018

J. Chem. Eng. Data

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The polymer polyoxyethylene(20) cetyl ether (C 56 H 114 O 21 , POELE20) and three salts (K 2 C 2 O 4 , K 2 C 4 H 4 O 6 , and K 3 C 6 H 5 O 7 ) were the phase-forming materials to build the aqueous two-phase system (ATPS) at the temperatures 288.15, 298.15, and 308.15 K. The data of the phase diagram including binodal curve data and tie-line data were determined and fitted by classical equations, and they obtained the satisfactory correlation effect. The phase-forming ability of salt composed of the same cation was investigated by three factors, namely, the valence of the anion, the Gibbs free energy of the anion, and the value of effective excluded volume (EEV). It was found that the phase-forming ability of salt strengthened when the values of said three factors went up. The results of the analysis on the data from the present work and that in our previous paper showed that the order of the phase-forming ability of salts was KOH

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Section: Resultsmentioning

confidence: 99%

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Yang

Sun

et al. 2018

J. Chem. Eng. Data

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“…The detailed Experimental method is described as per our earlier reports. 24,26 By convention, the component predominantly in the bottom phase was plotted in the abscissa (Na-tartrate for our system), and the component predominantly in the top phase was plotted as the ordinate (PPG-PEG-PPG #2000 for our system).…”

Section: Construction Of the Phase Diagrammentioning

confidence: 99%

Block copolymer as a novel functional phase in an aqueous biphasic system for species selective iodine extraction

2015

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This article describes a newly designed block copolymer based aqueous biphasic system (ABS, composed of two immiscible aqueous phases) which is further utilized to study extraction behavior of three iodine species viz., I 2 , I À , and IO 4 À . Phase diagram and tie line data reveals the potential working range of this new biphasic system. Fluorescence, dynamic light scattering, transmission electron microscopy (TEM) and conductance data establish the micellar arrangement in solutions of this particular block copolymer.Elemental iodine is easily soluble in copolymer solution due to charge transfer complexation. Polymer phase of the ABS is found to have species dependent selectivity of extraction for the three different iodine species. Two non toxic, non flammable dyes 3,6-diamino-10-phenylphenazinium chloride (DPC) and haematoxylin are introduced for the first time to detect iodide and periodate species respectively in the copolymer medium.

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“…Binodal data points were obtained from the biphasic compositions of the mother solutions of Brij 35 (30%)/Na 2 SO 4 (2 M), MgSO 4 (1.4 M), and ZnSO 4 (1.4 M) systems. The experimental procedure followed herein is described in our earlier reports. , Binodal curves were obtained by plotting weight percentages of Brij 35 and sulfate salts. The composition of the bottom phase (salt rich phase) was plotted in the abscissa and that in the top phase (surfactant rich phase) was plotted as the ordinate.…”

Section: Methodsmentioning

confidence: 99%

Comparison of Salt Cations in the Design of Nonionic Surfactant Based Aqueous Biphasic Systems: Application in Polyphenol Separations

Chakraborty

Sen

2016

J. Chem. Eng. Data

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New aqueous biphasic systems (ABSs) composed of a nonionic surfactant, Brij 35, and sulfate salts of Na, Mg, and Zn were designed. Ternary phase diagrams were constructed together with respective tie lines. The tie line lengths and slope of tie lines were calculated, and the results were validated using Othmer-Tobias and Bancroft equations. The binodals plotted for the three individual salts indicate their respective biphasic regions which follows the order MgSO 4 > ZnSO 4 > Na 2 SO 4 . All three ABSs were checked for their binary separation ability for the two polyphenols catechin and hesperidin. A pH dependent study indicates the possibility of separation of the two polyphenols using MgSO 4 as the salt rich phase.

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Phase separation in aqueous systems for realizing virtually significant extractions

Cited by 19 publications

References 29 publications

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Block copolymer as a novel functional phase in an aqueous biphasic system for species selective iodine extraction

Comparison of Salt Cations in the Design of Nonionic Surfactant Based Aqueous Biphasic Systems: Application in Polyphenol Separations

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