Density, refractive index and liquid–liquid equilibrium data of polyethylene glycol 3000 + potassium formate + water at different pH values

2018 ◽  
Vol 26 (1) ◽  
pp. 168-174 ◽  
Author(s):  
Fatemeh Ahmadi ◽  
Mohsen Pirdashti ◽  
Abbas Ali Rostami
Keyword(s):  
Refractive Index ◽  
Polyethylene Glycol ◽  
Liquid Equilibrium ◽  
Ph Values ◽  
Equilibrium Data

Liquid–Liquid Equilibrium Data for Aqueous Two-Phase Systems Containing PPG725 and Salts at Various pH Values

2012 ◽  
Vol 57 (7) ◽  
pp. 1867-1874 ◽  
Author(s):  
Mohammad-Kazem Shahbazinasab ◽  
Farshad Rahimpour
Keyword(s):  
Liquid Equilibrium ◽  
Two Phase ◽  
Ph Values ◽  
Equilibrium Data ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

scholarly journals Predictions of the vapor-liquid equilibrium data for low-GWP Hydrofluorocarbons + polyethylene-glycol dimethylether solvents by modified UNIFAC model

2021 ◽  
Vol 267 ◽  
pp. 02052
Author(s):  
Xiao Zhang ◽  
Liang Cai ◽  
Jingyi Qiao
Keyword(s):  
Experimental Data ◽  
Polyethylene Glycol ◽  
Large Deviations ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Liquid Equilibrium ◽  
Unifac Model ◽  
Equilibrium Data ◽  
Vle Data ◽  
Absorption Refrigeration System

The working fluids are crucial for developing the absorption refrigeration system. Our previous work has proposed three novel working pairs, which uses the low-GWP HFCs (R32, R152a and R161) as the refrigerants and the polyethylene-glycol dimethylether solvent DMETEG as the absorbent. To explore the VLE behaviors of HFCs in other longer chain structures of polyethylene-glycol dimethylether solvents, the modified UNIFAC (Dortmund) model was applied for prediction. The previous binary parameters showed large deviations from the experimental data. Then the new binary parameters were obtained by regression. For R32+DMEDEG and R152a/R161+DMETrEG, the prediction ARAD results were reduced from 17.13%, 24.06% and 12.48% to 3.71%, 2.61% and 6.86%, respectively. Finally, the VLE data of R161 + PGDE at the temperatures of 293.15-343.15K were predicted.

Refractive Index and Vapor–Liquid Equilibrium Data for the Binary Systems of Anisole with Xylene Isomers at 93.13 kPa

2018 ◽  
Vol 63 (9) ◽  
pp. 3475-3481
Author(s):  
Satyajeet S. Yadav ◽  
Nilesh A. Mali ◽  
Sunil S. Joshi
Keyword(s):  
Refractive Index ◽  
Binary Systems ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Equilibrium Data ◽  
Xylene Isomers ◽  
Vapor Liquid

Liquid–liquid equilibria for the water + ethanol + 2-ethyl-1-hexanol ternary system at several temperatures

1990 ◽  
Vol 68 (9) ◽  
pp. 1532-1536 ◽  
Author(s):  
Horacio N. Solimo
Keyword(s):  
Experimental Data ◽  
Refractive Index ◽  
Ternary System ◽  
Conjugate Points ◽  
Group Contribution Method ◽  
Liquid Equilibrium ◽  
Ethanol Extraction ◽  
Equilibrium Data ◽  
Tie Line ◽  
System Water

Liquid–liquid equilibrium data for the system water + ethanol + 2-ethyl-1-hexanol were obtained at 298.15, 308.15, and 318.15 K. Data for the binodal curves have been determined by cloud-point method and conjugate points on tie-line were obtained by correlating the refractive index of the binodal curves as a function of composition. The tie-line data at each temperatures were satisfactorily correlated using the method of Othmer and Tobias and the plait points coordinates were estimated. The experimental data were also fitted with the UNIFAC group contribution method for the activity coefficients using the isoactivity conditions as restraint equations. From the experimental results, ethanol extraction by 2-ethyl-1-hexanol appears not to depend on temperature and 2-ethyl-1-hexanol could be selected as a promissory solvent for extraction of ethanol from aqueous solutions. Keywords: liquid–liquid equilibria, ethanol extraction, water + ethanol + 2-ethyl-1-hexanol ternary system.

Europium and cerium extraction by the nitrobenzene solution of dicarbolide in the presence of polyethylene glycols

1986 ◽  
Vol 51 (3) ◽  
pp. 498-515 ◽  
Author(s):  
Emanuel Makrlík ◽  
Petr Vaňura
Keyword(s):  
Molecular Weight ◽  
Polyethylene Glycol ◽  
Organic Phase ◽  
Perchloric Acid ◽  
Equilibrium Constants ◽  
Polyethylene Glycols ◽  
Individual Species ◽  
Nitrobenzene Solution ◽  
Separation Factors ◽  
Equilibrium Data

Extraction of Eu3+ and Ce3+ microamounts from 0.1-0.4M perchloric acid by the nitrobenzene solution of dicarbolide H+[Co(C2B9H11)2]- in the presence of polyethylene glycols (Mr = 200, 300, 400) has been studied. The equilibrium data and the typical maxima on the dependence of the metal distribution ratio on the total analytical concentration of polyethylene glycol in the system can be explained assuming that the species ML3+org, ML3+2org, ML3+3org, MLH2+-1org, and HL+org (where M3+ = Eu3+, Ce3+; L = polyethylene glycol) are extracted into the organic phase. The values of extraction and equilibrium constants in the organic phase were determined and the effect of the polyethylene glycol molecular weight on the equilibrium constants and on the abundances of individual species in the organic phase is discussed. It has been found that the addition of polyethylene glycol to the acid - nitrobezene - dicarbolide system increases the values of the separation factors αCe/Eu.

Isothermal and isobaric vapour-liquid equilibrium data in the tetrachloromethane-sec-butyl alcohol system

1983 ◽  
Vol 48 (9) ◽  
pp. 2446-2453 ◽  
Author(s):  
Jan Linek
Keyword(s):  
Experimental Data ◽  
Boiling Point ◽  
Butyl Alcohol ◽  
Correlation Equations ◽  
Wilson Equation ◽  
Liquid Equilibrium ◽  
Raoult’S Law ◽  
System A ◽  
Equilibrium Data ◽  
Alcohol System

Isothermal vapour-liquid equilibrium data at 65, 73 and 80 °C and isobaric ones at 101.3 kPa were measured in the tetrachloromethane-sec-butyl alcohol system. A modified circulation still of the Gillespie type was used for the measurements. Under the conditions of measurement, the system exhibits positive deviations from Raoult's law and minimum boiling-point azeotropes. The experimental data were fitted to a number of correlation equations, the most suitable being the Wilson equation.

Vapour-liquid equilibrium in the ternary system cyclohexane-acetic acid-propionic acid

1989 ◽  
Vol 54 (11) ◽  
pp. 2840-2847 ◽  
Author(s):  
Ivona Malijevská ◽  
Alena Maštalková ◽  
Marie Sýsová
Keyword(s):  
Acetic Acid ◽  
Ternary System ◽  
Propionic Acid ◽  
Activity Coefficients ◽  
Error Propagation ◽  
Analytical Techniques ◽  
Liquid Equilibrium ◽  
Consistency Test ◽  
Propagation Law ◽  
Equilibrium Data

Isobaric equilibrium data (P = 101.3 kPa) for the system cyclohexane-acetic acid-propionic acid have been measured by two different analytical techniques. Activity coefficients calculated by simultaneous solving of equations for the chemical and phase equilibria were subjected to a consistency test based on inaccuracies determined from the error propagation law, and were correlated by Wilson’s equation. The activity coefficients measured were compared with those calculated from binary vapour-liquid equilibrium data and with values predicted by the UNIFAC method.

Measurements and Thermodynamic Modeling of Liquid–Liquid Equilibrium Data for 2-Methyl-2-Butanol + Water + Ethylbenzene

2021 ◽  
Author(s):  
Xuemei Zhang ◽  
Chungui Jian ◽  
Jianting Du ◽  
Hongwei Wang ◽  
Wangxin Kong ◽  
...  
Keyword(s):  
Thermodynamic Modeling ◽  
Liquid Equilibrium ◽  
Equilibrium Data

Measurement and correlation of liquid–liquid equilibrium data for 2-methyl-1-propanol+2-propanol+water at several temperatures

2013 ◽  
Vol 340 ◽  
pp. 37-41 ◽  
Author(s):  
Yinglong Wang ◽  
Ying Liu ◽  
Peizhe Cui
Keyword(s):  
Liquid Equilibrium ◽  
Equilibrium Data
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