DECHEMA data collection

The DECHEMA data collection includes liquid-liquid equilibrium data for several hundred mixtures, DECHEMA (1977). 

The prerequisite of all types of extraction processes is the existence of a large miscibility gap between raffinate and extract. The thermodynamic principles of phase equilibrium are dealt with in Chap. 2. An extensive collection of liquid-liquid equilibria is given in the Dechema Data Collection (Sorensen and Arlt 1980ff). Volume 1 contains data of miscibility gaps of binary systems. Phase equilibrium data (miscibility gaps and distribution equilibrium) of ternary and quaternary mixtures are listed in volumes 2-7. 

Gmehling, J., and U. Onken "Vapor-Liquid Equilibrium Data Collection," DECHEMA Chemistry Data Ser., Vol. 1 (1-10), Frankfurt, 1977. 

J. Gmehling and U. Onken, Hapor-EiquidEquilibrium Data Collection, Chemistry Data Series, Dechema, Frankfurt, 1977 ff... 

J. M. Sorenson and W. Adt, Eiquid—Eiquid Equilibrium Data Collection, Dechema Chemistry Data Series, Frankfurt, Germany, Part 1,1980. 

G. Sorensen and J. M. W. Arit, Hquid-lJquid Equilibrium Data Collection, Binay Systems, DECHEMA Chemistry Data Series, Vol. 5, part 1, Schon Wetzel GmbH, Frankfurt/Main, Germany, 1979. 

J. GmeKHng and U. Onken, l apor—l iquidEquilibrium Data Collection, A.queous Organic Systems, DECHEMA, Erankfurt, Germany, 1977. 

J. Gmehliag, U. Onken, and W. Adt, Vapor—EiquidEquilibrium Data Collection, Organic Hydrouy Compounds-. VUcohols, Suppl. 1, DECHEMA, Frankfurt, Germany, 1982. 

J. Gmehhng and U. Onken, Chemist Data Series, Hapor—EiquidEquilibrium Data Collection, Dechema, Frankfurt, Germany, 1977ff... 

Again subscript i identifies species, and J and I are dummy indicies. Values for the parameters r, qi, and (up — tip) are given by Gmehhng, Onken, and Ant (Vapor-Liquid Equilibrium Data Collection, Chemistry Data Series, vol. I, parts 1-8, DECHEMA, FrankfurUMain, 1974-1990). 

Worth noting is the fact that Barkers method does not require experimental yf values. Thus the correlating parameters Ot, b, and so on, can be ev uated from a P-X data subset. Common practice now is, in fact, to measure just such data. They are, of course, not subject to a test for consistency by the Gibbs/Duhem equation. The worlds store of X T.E data has been compiled by Gmehling et al. (Vapor-Liquid Lquilibiium Data Collection, Chemistiy Data Series, vol. I, parts 1-8, DECHEMA, Frankfurt am Main, 1979-1990). 

A comprehensive treatment of LLE is given by Sorensen, et al. Fluid Phase Equilibria, 2, pp. 297-309 [1979] 3, pp. 47-82 [1979] 4, pp. 151-163 [1980]). Data for LLE are collected in a three-part set compiled by Sorensen and Arlt Liquid-Liquid Equilibrium Data Collection, Chemistry Data Series, vol. V, parts 1-3, DECHEMA, Frankfurt am Main, 1979-1980). 

Abstracted from Gmehling and Onken, Vapor-Liquid Kquilihhum Data Collection, DECHEMA Chemistry Data ser., vol. 1 (parts 1-10), Frankfurt, 1977. f Antoine equation is log P = A — B/(T + C) with P " in torr and T in C. 

Gmehhng and Onken (Vapor-Liquid Equilibrium Data Collection, DECHEMA, Frankfurt, Germany, 1979) have reported a large collection of vapor-liqnid equilibrium data along with correlations of the resulting activity coefficients. This can be used to predict liqnid-hqnid equilibrium partition ratios as shown in Example 1. 

Sorenson and Arlt Liquid-Liquid Equilihiium Data Collection, DECHEMA, Frankfurt, Germany, 1979) report several sets of liquid-liquid equilibrium data for the system acetone-water-chloroform, but the lowest solute concentrations reported at 25 C were. 3 weight percent acetone in the water layer in equilibrium with 9 weight percent acetone in the chloroform layer. This gives a partition ratio K of, 3.0. 

Equilibrium Data Collection, DECHEMA, Frankfurt, Germany, 1979) have reported several volumes of data that have been correlated with activity-coefficient equations. 

J. Barthel, R. Neueder in Electrolyte Data Collection (Ed. G. Kreysa), Chemistry Data Series, Vol. XII, Part 1, DECHEMA, Frankfurt, 1992. 

Snee, T.J., Barcons, C., Hernandez, H., and Zaldivar, J.M., 1992, J. Thermal Analysis, 38, 2729. Sdrensen, J.M. and Arit, W.. 1980, Liquid-Liquid Equilibria Data Collection. Vol. V. Part 3 Ternary and Quaternary Systems , DECHEMA Chemistry Data, Dechema, Frankfurt. 

Experimental data have been published for several thousand binary and many multicomponent systems. Virtually all the published experimental data has been collected together in the volumes comprising the DECHEMA vapour-liquid and liquid-liquid data collection, DECHEMA (1977). The books by Chu et al. (1956), Hala et al. (1968, 1973), Hirata et al. (1975) and Ohe (1989, 1990) are also useful sources. 

A significant advantage of the Wilson equation is that it can be used to calculate the equilibrium compositions for multicomponent systems using only the Wilson coefficients obtained for the binary pairs that comprise the multicomponent mixture. The Wilson coefficients for several hundred binary systems are given in the DECHEMA vapour-liquid data collection, DECHEMA (1977), and by Hirata (1975). Hirata gives methods for calculating the Wilson coefficients from vapour liquid equilibrium experimental data. 

The best source of data for the UNIQUAC constants for binary pairs is the DECHEMA vapour-liquid and liquid-liquid data collection, DECHEMA (1977). 

Sorensen, J. M. and Arlt, W. (1979) Liquid-Liquid Equilibrium Data Collection, Chemical Data Series Vols V/2, V/3 (DECHEMA). 

Gmehling, T. U. Onken and W. Arlt. Vapor-Liquid Equilibrium Data Collection. DECHEMA VI, Part 1A (1981). 

Gmehling, J. Onken, V., Part 1 "Aqueous-Organic Systems" in "DECHEMA Chemistry Data Series, Vol. 1, Vapor-Liquid Equilibrium Data Collection" Deutsche Gesellschaft fur Chemisches. Frankfurt, 1977. 

Sorensen and Arlt, Liquid-Liquid Equilibritan Data Collection, DECHEMA, Frankfurt/Main, FRG, 1979-1980, 3 vols. 

J. Gmehling, U. Onken, Vapour-Liquid Equilibrium Data Collection, DECHEMA Chemistry Data Series, vol. 1, 12 parts, DECHEMA, Frankfurt am Main, 1982. 

Phase-Equilibrium Data Shaw, D. G., and A. Maczynski (eds.), IUPAC Solubility Data Series, Vol. 81 Hydrocarbons in Water and Seawater—Revised and Updated, published in 12 parts in /. Fhys. Chem. Ref. Data, 2005 and 2006 Gmehling, J., et al, Vapor-Liquid Equilibrium Data Collection Aqueous-Organic Systems, DECHEMA Chemistry Data Series, Vol. I, Part 1-ld, Schon Wetzel GmbH, Frankfurt/Main, Germany, 1988. 

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