scholarly journals LIQUID-LIQUID EQUILIBRIA OF THE WATER+ETHANOL+DIMETHYL ADIPATE TERNARY SYSTEM

2002 ◽  
Vol 10 (11) ◽  
pp. 19-31
Author(s):  
Erol Ince ◽  
S. ismail Kirbaslar
Keyword(s):  
Experimental Data ◽  
Phase Equilibrium ◽  
Distribution Coefficients ◽  
Liquid Equilibrium ◽  
Immiscibility Region ◽  
Separation Factors ◽  
Equilibrium Data ◽  
Dimethyl Adipate ◽  
Tie Line ◽  
System Water

Liquid-liquid equilibrium data for the terna1y system water-ethanol-dimethyl adipate (dibasic ester) have been determined experimentally at 298.15±0.20, 308.15±0.20, and 318.15±0.20 K. Tie-line compositions were correlated by the Othmer-Tobias method. The UNIFAC method was used to predict the phase equilibrium in the system using the interaction parameters determined from experimental data between the CH3, CH2, OH, CH3COO and H20 groups. Distribution coefficients and separation factors were evaluated for the immiscibility region

Influence of temperature on the liquid-to-liquid extraction of ethanol from (water + ethanol + 1,2-dichloroethane)

1992 ◽  
Vol 70 (8) ◽  
pp. 2310-2313 ◽  
Author(s):  
Horacio N. Sólimo ◽  
José L. Zurita
Keyword(s):  
Experimental Data ◽  
Conjugate Points ◽  
Liquid Equilibrium ◽  
Experimental Conditions ◽  
Influence Of Temperature ◽  
Equilibrium Data ◽  
Tie Lines ◽  
Influence Of Temperature On ◽  
Tie Line ◽  
System Water

To evaluate the influence of temperature on the extraction of ethanol from aqueous solutions with 1,2-dichloroethane, liquid–liquid equilibrium data for the system water + ethanol + 1,2-dichloroethane were obtained at 298.15, 308.15, and 318.15 K. The binodal curves were determined by the cloud-point method, and conjugate points on the tie-lines were obtained by correlating the refractive index of these curves as a function of composition. The tie-line data at each temperature were satisfactorily correlated using the method of Othmer and Tobias, and the plait-point coordinates were estimated. The experimental data were also compared to values calculated by the UNIFAC group contribution method for the activity coefficients using the isoactivity conditions as restraint equations, and with the NRTL and UNIQUAC models. The UNIFAC method proved to be more accurate than the NRTL and UNIQUAC equations fitted to the experimental data. Under the experimental conditions used, ethanol extraction by 1,2-dichloroethane appears to be independent of the temperature.

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.

(Liquid + Liquid) Equilibrium for Ternary System of (Water + Phenol + Cyclohexane) at T = 298.2 K

2013 ◽  
Vol 3 (2) ◽  
pp. 75-84
Author(s):  
Hossein Ghanadzadeh ◽  
Milad Sangashekan ◽  
Shahin Asan
Keyword(s):  
Ternary System ◽  
Root Mean Square ◽  
Atmospheric Pressure ◽  
Distribution Coefficients ◽  
Mean Square ◽  
Liquid Equilibrium ◽  
Separation Factors ◽  
Experimental Solubility ◽  
Tie Line

Experimental solubility curves and tie-line data for the (water + phenol + 2-ethyl-1-hexanol) system was obtained at T = 298.2 K and atmospheric pressure. The tie-line data was determined by techniques karl-fischer and refractometry. This ternary system exhibits type-2 behavior of LLE. Distribution coefficients and separation factors were measured to evaluate the extracting ability of the solvent. The consistency of the experimental tie-line data was determined through the Othmer–Tobias and Bachman equations. The data were correlated with the NRTL (a = 0.25) and UNIQUAC models and the parameters estimated present root mean square deviations below 0.50%.

Liquid-Liquid Equilibrium of the Ternary System Water/Formic Acid/1-Pentanol at T= 308.2 K

2013 ◽  
Vol 3 (2) ◽  
pp. 85-93 ◽  
Author(s):  
Hossein Ghanadzadeh ◽  
Shahin Asan ◽  
Milad Sangashekan
Keyword(s):  
Ternary System ◽  
Formic Acid ◽  
Ambient Pressure ◽  
Distribution Coefficients ◽  
Liquid Equilibrium ◽  
Separation Factors ◽  
Mass Fractions ◽  
Equilibrium Data ◽  
Calculated Mass

Liquid–liquid equilibrium data for the (water + Formic acid + 1-pentanol) ternary system were determined at T = (308.2) K in ambient pressure. This ternary system exhibits type-1 behavior of LLE. Distribution coefficients and separation factors were measured to evaluate the extracting capacity of the solvent. The consistency of the experimental tie-line data was determined through the Othmer–Tobias and Bachman equations. The raw experimental data were correlated using the NRTL and UNIQUAC models. The average root-mean-square deviation between the experimental and calculated mass fractions was 0.488% and 0.465%.

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.

Parameters of the Bender Equation of State for Chloro Derivatives of Methane and Chlorobenzene

2001 ◽  
Vol 66 (6) ◽  
pp. 833-854 ◽  
Author(s):  
Ivan Cibulka ◽  
Lubomír Hnědkovský ◽  
Květoslav Růžička
Keyword(s):  
Experimental Data ◽  
Equation Of State ◽  
Virial Coefficient ◽  
Second Virial Coefficient ◽  
Virial Coefficients ◽  
Liquid Equilibrium ◽  
Second Virial Coefficients ◽  
Equilibrium Data ◽  
State Behaviour ◽  
Derivatives Of

Values of adjustable parameters of the Bender equation of state evaluated for chloromethane, dichloromethane, trichloromethane, tetrachloromethane, and chlorobenzene from published experimental data are presented. Experimental data employed in the evaluation included the data on state behaviour (p-ρ-T) of fluid phases, vapour-liquid equilibrium data (saturated vapour pressures and orthobaric densities), second virial coefficients, and the coordinates of the gas-liquid critical point. The description of second virial coefficient by the equation of state is examined.

Liquid-liquid equilibrium data for the system water-benzonitrile-methanol

1989 ◽  
Vol 34 (4) ◽  
pp. 382-384 ◽  
Author(s):  
Gustavo J. Botto ◽  
Horacio H. Agaras ◽  
Carlos M. Marschoff
Keyword(s):  
Liquid Equilibrium ◽  
Equilibrium Data ◽  
System Water
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