LLE – Liquid-Liquid Equilibria

The LLE data bank contains a large amount of liquid-liquid equilibrium data and liquid solubility data for binary and higher systems. It is of great importance for extraction (distribution of a component between two liquid phases in equilibrium) and in case of other unit operations involving immiscible systems. The LLE data bank is required by the process synthesis software for the selection of solvents for liquid-liquid extraction using DDB.

Besides data for ternary and higher mixtures typically used for the design of extraction processes, the data bank contains a huge amount of information on mutual solubility as function of temperature and pressure. In case of low mutual solubility, activity coefficients at infinite dilution can directly be calculated from the solubility data.

Several different possibilities for the change of the immiscible region with temperature are given in the plot below together with the component combinations depicted in these examples. All data were taken from the DDB-LLE data bank.

A full list of available systems is available in our DDB Online Search system. The page might take some seconds to load because of its size.

Data Tables, Monographies

1980    DECHEMA Chemistry Data Series, Liquid-Liquid Equilibrium Data Collection. Part 2: Ternary Systems Part 3: Ternary and Quaternary Systems    Arlt W., Macedo M.E.A., Rasmussen P., Sorensen J.M.    Vol., 5.2+3, , 1-1290 (1980)
1979    DECHEMA Chemistry Data Series, Liquid-Liquid Equilibrium Data Collection. Part 1: Binary Systems    Arlt W., Macedo M.E.A., Rasmussen P., Sorensen J.M.    Vol., 5.1, , 1-650 (1979)

Selected Scientific Papers

2005    Extended Flexibility for GE Models and Simultaneous Description of Vapor-Liquid Equilibrium and Liquid-Liquid Equilibrium using a Nonlinear Transformation of the Concentration Dependence    Rarey J.    Journal    Ind.Eng.Chem.Res., 44, 19, 7600 7608 (2005)
1998    Separation of Enantiomers by Liquid-Liquid Counter Current Chromatography    Buchholz K., Schulte B., Gmehling J., Martens J.    Journal    Chem.Eng.Technol., 21, 5, 404 408 (1998)
1991    Darstellung der Temperaturabhaengigkeit binaerer Fluessig/Fluessig-Gleichgewichte mit Hilfe von gE-Modellen    Meyer T., Gmehling J.    Journal    Chem.Ing.Tech., 63, 5, 486 488 (1991)
1991    Correlation of binary liquid-liquid equilibrium data over a wide temperature range using UNIQUAC and extended UNIQUAC models    Nagata I., Meyer T., Gmehling J.    Journal    Fluid Phase Equilib., 65, 6, 19 39 (1991)
1980    Application of a Modified Wilson-Equation to Liquid Mixtures Showing Phase Splitting    Schulte H.W., Grenzheuser P., Gmehling J.    Journal    Fluid Phase Equilib., 4, 3, 185 196 (1980)

Selected Scientific Papers (Experimental Data)

2007    Vapor-Liquid Equilibria and HE for Binary Systems of Dimethyl Ether (DME) with C1-C4 Alkan-1-ols at 323.15 K and Liquid-Liquid Equilibria for Ternary System of DME + Methanol + Water at 313.15 K    Park S.-J., Han K.-J., Gmehling J.    Journal    J.Chem.Eng.Data, 52, 1, 230 234 (2007)
2004    Vapor-Liquid-Liquid Equilibria, Azeotropic, and Excess Enthalpy Data for the Binary System n-Undecane + Propionamide and Pure-Component Vapor Pressure and Density Data for Propionamide    Horstmann S., Fischer K., Gmehling J.    Journal    J.Chem.Eng.Data, 49, 6, 1494 1498 (2004)
1994    Vapor-Liquid and Liquid-Liquid Equilibria for the Toluene + 1,2-Propanediol + Water System    Fele L., Fermeglia M., Alessi P., Rarey J.R., Golob J.    Journal    J.Chem.Eng.Data, 39, 4, 735 741 (1994)