Aqueous two-phase system of poly(ethylene glycol) 4000 and sodium molybdate at different temperatures

被引：17

作者：

Barrueto, Yahaira ^{[1
]}

Munoz, Katherine ^{[1
]}

Garnica, Katiuska ^{[1
]}

Villalobos, Islaman ^{[1
]}

Jimenez, Yecid P. ^{[1
]}

机构：

[1] Univ Antofagasta, Dept Chem & Mineral Proc Engn, Antofagasta, Chile

来源：

FLUID PHASE EQUILIBRIA | 2015年 / 399卷

关键词：

Aqueous two-phase system; Liquid-liquid equilibrium; Polyethylene glycol; Sodium molybdate; LIQUID-LIQUID EQUILIBRIUM; PHASE-EQUILIBRIUM; THERMODYNAMICS; SEPARATION; EXTRACTION; BEHAVIOR;

D O I：

10.1016/j.fluid.2015.04.025

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Liquid-liquid equilibrium (LLE) data for the Na2MoO4+ polyethylene glycol 4000 (PEG 4000) + H2O system were determined experimentally at T= (288.15, 298.15 and 308.15) K. Additionally, experimental data of density, sound velocity, refractive index and viscosity are also reported at T= (288.15, 298.15 and 308.15) K. The effect of temperature on the binodal curves and tie-lines was studied and it was found that an increasing in temperature caused the expansion of two-phase region. The extended UNIQUAC model and the Othmer-Tobias and Bancroft equations were used to correlate the experimental tie-line data obtaining a good representation of the equilibrium. Moreover, the Merchuk equation was used to correlate the binodal curves. A good agreement between experimental and correlated values of the tie-lines was obtained. (c) 2015 Elsevier B.V. All rights reserved.

引用

页码：66 / 73

页数：8

共 20 条

[1] STATISTICAL THERMODYNAMICS OF LIQUID-MIXTURES - NEW EXPRESSION FOR EXCESS GIBBS ENERGY OF PARTLY OR COMPLETELY MISCIBLE SYSTEMS [J].

ABRAMS, DS ;

PRAUSNITZ, JM .

AICHE JOURNAL, 1975, 21 (01) :116-128

[2]

[Anonymous], 1991, Thermodynamics of Solvation

[3] A new method for determining dineric distribution [J].

Bancroft, WD ;

Hubard, SS .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1942, 64 :347-353

[4] Extraction of metal ions in aqueous polyethylene glycol-inorganic salt two-phase systems in the presence of inorganic extractants: Correlation between extraction behaviour and stability constants of extracted species [J].

Bulgariu, Laura ;

Bulgariu, Dumitru .

JOURNAL OF CHROMATOGRAPHY A, 2008, 1196 (1-2) :117-124

[5] Liquid-liquid equilibrium of the CuSO4 + PEG 4000+H2O system at different temperatures [J].

Claros, Martha ;

Elisa Taboada, Maria ;

Galleguillos, Hector R. ;

Jimenez, Yecid P. .

FLUID PHASE EQUILIBRIA, 2014, 363 :199-206

[6] Equilibrium data of the biphasic system poly(ethylene oxide) 4000 plus copper sulfate plus water at (5, 10, 35, and 45) °C [J].

de Oliveira, Rosana Moura ;

dos Reis Coimbra, Jane Selia ;

Francisco, Kelly Roberta ;

Minim, Luis Antonio ;

Mendes da Silva, Luis Henrique ;

Garcia Rojas, Edwin Elard .

JOURNAL OF CHEMICAL AND ENGINEERING DATA, 2008, 53 (07) :1571-1573

[7] Ionic liquids for aqueous two-phase extraction and stabilization of enzymes [J].

Dreyer, Susanne ;

Kragl, Udo .

BIOTECHNOLOGY AND BIOENGINEERING, 2008, 99 (06) :1416-1424

[8] THERMODYNAMICS OF AMMONIUM-SULFATE POLYETHYLENE-GLYCOL AQUEOUS 2-PHASE SYSTEMS .1. EXPERIMENT UNIQUAC EQUATION [J].

GAO, YL ;

PENG, QH ;

LI, ZC ;

LI, YG .

FLUID PHASE EQUILIBRIA, 1991, 63 (1-2) :157-171

[9] Phase equilibrium and partition of iodide in an aqueous biphasic system formed by (NH4)2SO4 plus PEG plus H2O at 25 °C [J].

Graber, T. A. ;

Medina, H. ;

Galleguillos, H. R. ;

Taboada, M. E. .

JOURNAL OF CHEMICAL AND ENGINEERING DATA, 2007, 52 (04) :1262-1267

[10] On extension of UNIQUAC-NRF model to study the phase behavior of aqueous two phase polymer-salt systems [J].

Haghtalab, A ;

Mokhtarani, B .

FLUID PHASE EQUILIBRIA, 2001, 180 (1-2) :139-149

← 1 2 →