Liquid data collection

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). 

CEH Fterry s Chemical Engineering Handbook 2b. V2, 3 and 4 Dechema Liquid/liquid Data Collection... 

Sorensen, J.M. and Adt, W. (1979) Liquid-Liquid Liquilibrium Data Collection Dechema, Frankfurt/Main. A companion collection to the Dechema vapour/liquid data collection with most ternary systems plotted as diagrams. 

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

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. 

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. 

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

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

The advantages of measuring at very low temperatures are well established [4], Because of the increased speed of data collection, it now becomes feasible to consider the use of liquid helium as a cryogen. A prototype open-flow helium cooling device using mainly off-the-shelf components has been developed [3],... 

Gmehling J, Onken U and Arlt W (1977-1980) Vapor-Liquid Equilibrium Data Collection, Dechema Chemistry Data Series. 

The Wilhelmy hanging plate method (13) has been used for many years to measure interfacial and surface tensions, but with the advent of computer data collection and computer control of dynamic test conditions, its utility has been greatly increased. The dynamic version of the Wilhelmy plate device, in which the liquid phases are in motion relative to a solid phase, has been used in several surface chemistry studies not directly related to the oil industry (14- 16). Fleureau and Dupeyrat (17) have used this technique to study the effects of an electric field on the formation of surfactants at oil/water/rock interfaces. The work presented here is concerned with reservoir wettability. 

Software for Data Collection and Analysis from a Size-Exclusion Liquid Chromatograph... 

Size exclusion liquid chromatography M) has been widely used to characterize distributions of molecular weights in polymer specimens. This paper describes a package of computer programs for automatic data collection and data reduction in size exclusion liquid chromatography (2). The programs and the environment in which they operate are carefully tailored to emphasize the interaction between the user and his data rather than the Interaction between the user and the computer. The system we describe differs from that described by Koehler et al. (J) in that all functions are performed by a stand-alone system. 

---