DECHEMA

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

This database provides thermophysical property data (phase equilibrium data, critical data, transport properties, surface tensions, electrolyte data) for about 21 000 pure compounds and 101 000 mixtures. DETHERM, with its 4.2 million data sets, is produced by Dechema, FIZ Chcmic (Berlin, Germany) and DDBST GmhH (Oldenburg. Germany). Definitions of the more than SOO properties available in the database can be found in NUMERIGUIDE (sec Section 5.18). 

DETHERM Dechema e.V, FIZ Chemie Berlin GmbH diermophysi-cal properties nu- meric, factual, biblio. 442000 records, 57000 biblio. journals, patent offices, proceedings, books STN in-house, online twice a year wuw.dechem- a.de... 

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

U. von Stockar, MCHEMMSIM, 1989 (International Meeting on Chemical Engineering Biotechnology, Beijing, China), Dechema Ciesc, 1989,... 

Preprints of the International S olvent Extraction Conference 1986, Vols. 1—3, Dechema, Frankfurt, Germany, 1986. 

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

A. E. Karr and S. Ramanujan, International Solvent Pxtraction Conference 1986 Vol. 2, Dechema, Erankfurt, Germany, 1986. 

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. 

H. Knapp, R. Doting, L. OeUrich, U. Plocker, and J. M. Prausnit2, Vapor—Eiquid Equilibriafor Mixtures of Eow Boiling Substances, Chemistry Data Series, Vol VI, Dechema, 1982. 

D. Bergner, Membrane Electrolyzers for the Chlor-Mlkali Industy, Dechema-Monographs, Vol. 123, VCH VedagsgeseUschaft, New York, 1991, pp. 113-131. 

K. Lucas, Phase Equilibrium and Fluid Properties in the Chemical Industry, Dechema, Erankfurt, 1980. 

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. 

The disc centrifuge, developed by Slater and Cohen and modified by Allen and Svarovsky [Allen and Svarovsky, Dechema Monogram,... 

Pulverit planetaiy mills are available from Geoscience Inc. Highspeed planetary-baU mills can be used to perform rapid tests to sinmlate ball milhng of materials [Vock, DECHEMA-Monogr, 69, HI-8 (1972)]. The size of high-speed mills will be much smaller than the size of same-capacity ball mills [Bradley, S. Afr Mech. Eng., 22, 129 (1972)]. 

W. Fischer, EUROCORR 87, DECHEMA, Frankfurt 1987, S. 719B724 W. Fischer U. Hermann u. M. Schroder, Werkstoffe u. Korrosion 42, 620 1991. Schiffbautechnische Gesellschaft, STG-Richtilinien Nr. 2220, Hamburg 1988. 

H. Grafen, in DECHEMA-Monografie Bd. 93 Elektrochemie der Metalle, Gewinnung, Verarbeitung und Korrosion , S. 253-265, VCH-Verlag, Weinheim 1983. 

German Society for Chemical Engineering, Biotechnology and Environmental Protection (DECHEMA)... 

Deutsche Gesellschaft fur Chemisches Apparatewesen, Chemische Technik und Bioteclmologie e.V (DECHEMA). Theodor-Heuss-Allee 25 D-60486 Frankfurt am Main, Geiinany... 

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