Isobaric vapor-liquid

Fig. 15. Isobaric vapor—liquid—liquid (VLLE) phase diagrams for the ethanol—water—benzene system at 101.3 kPa (D-D) representHquid—Hquid tie-lines (A—A), the vapor line I, homogeneous azeotropes , heterogeneous azeotropes Horsley s azeotropes, (a) Calculated, where A is the end poiat of the vapor line and the numbers correspond to boiling temperatures ia °C of 1, 70.50 2, 68.55 3, 67.46 4, 66.88 5, 66.59 6, 66.46 7, 66.47, and 8, the critical poiat, 66.48. (b) Experimental, where A is the critical poiat at 64.90°C and the numbers correspond to boiling temperatures ia °C of 1, 67 2, 65.5 3, 65.0 ...

Dejoz, A., Gonzales-Alfaro, V., Miguel, P.J., Vazquez, M.I. (1996) Isobaric vapor-liquid equilibria for binary systems composed of octane, decane, and dodecane at 20 kPa. J. Chem. Eng. Data 41, 93-96. 

Aucejo, A., Loras, S., Munoz, R., Reich, R., and Segura, H. Isobaric vapor-liquid equilibrium in the systems 2-methylpentane-r methyl 1,1-dimethylethyl ether,-r ethyl 1,1-dimethylethyl ether, and-r methyl l,l-dimethylpropylether,7 Chem. Eng. Data, 43(6) 973-977, 1998. 

Blanco, A.M., Beltran, S., Cabezas, J.L., and Coca, J. Phase equilibria of binary systems formed by hydrocarbons from petroleum fractions and the solvents TV-methylpyrrolidone and /(Wdimethylformamide. 1. Isobaric vapor-liquid equilibria. / Chem. Eng. Data, 42(5) 938-942, 1997. 

Blanco, A.M. and Ortega, J. Isobaric vapor-liquid equilibria of methanol + methyl ethanoate, + methyl propanoate, and + methyl butanoate at 141 kPa, J. Chem. Eng. Data, 41(3) 566-570, 1996. 

Ortega, J., Espiau, F., Tojo, J., Canosa, J., and Rodriguez, A. Isobaric vapor-liquid equilibria and excess properties for the binary systems of methyl esters -t heptane, J. Chem. Eng. Data, 48(5) 1183-1190, 2003. 

The data in Tables I-XVI (see Appendix for all tables) show the isobaric vapor-liquid equilibrium results at the boiling point for potassium, ammonium, tetramethylammonium, tetraethylammonium, tetra-n-propylammonium, and tetra-n-butylammonium bromides in various ethanol-water mixtures at fixed liquid composition ratios. The temperature, t, is the boiling temperature for all solutions in these tables. In all cases, the ethanol-water composition was held constant between 0.20 and 0.35 mole fraction ethanol since it is in this range that the most dramatic salt effects on vapor-liquid equilibrium in this particular system should be observed. That is, previous data (12-15,38) have demonstrated that a maximum displacement of the vapor-liquid equilibrium curve by salts frequently occurs in this region. In the results presented here, it should be noted that Equation 1 has been modified to... 

Table I. Isobaric Vapor—Liquid Equilibrium Data for the Potassium Bromide—Ethanol—Water System at x = 0.206 0.001 (760 5 Torr)...

Figure 14.14 shows the critical locus, along with some isothermal and isobaric (vapor + liquid) sections, for a type III system. Lines ab and cd are the vapor... 

Table 4 Isobaric Vapor-Liquid Equilibrium results for Methanol-Water...

FIG. 13-4 Isobaric vapor-liquid equilibrium curves for benzene-toluene. Brian, Staged Cascades in Chemical Processing, Frentice-Hall, Englewood Cliff , N.J., 1972.)... 

Either isothermal or isobaric vapor—liquid equilibria or both are calculated with a subprogram called VLE. For SOLTER and VLE, Modified van Laar coefficients for two or three temperatures give the data by which liquid phase activity coefficients are calculated for both... 

Prediction of Isobaric Vapor-Liquid Equilibrium Data for Mixtures of Water and Simple Alcohols... 

The Non-Random, Two Liquid Equation was used in an attempt to develop a method for predicting isobaric vapor-liquid equilibrium data for multicomponent systems of water and simple alcohols—i.e., ethanol, 1-propanol, 2-methyl-l-propanol (2-butanol), and 3-methyl-l-butanol (isoamyl alcohol). Methods were developed to obtain binary equilibrium data indirectly from boiling point measurements. The binary data were used in the Non-Random, Two Liquid Equation to predict vapor-liquid equilibrium data for the ternary mixtures, water-ethanol-l-propanol, water-ethanol-2-methyl-1-propanol, and water-ethanol-3-methyl-l-butanol. Equilibrium data for these systems are reported. 

Isobaric Vapor-Liquid Equilibrium in the Acetic Acid-Acetone System... 

Prediction of Vapor Composition in Isobaric Vapor-Liquid Systems Containing Salts at Saturation... 

Isobaric vapor-liquid equilibrium data at atmospheric pressure are reported for the four systems of the present investigation in Tables I-VI. Salt concentrations are reported as mole fraction salt in the solution, while mixed-solvent compositions are given on a salt-free basis. A single fixed-liquid composition was used for potassium iodide and sodium acetate potassium acetate used three—all chosen from the region of ethanol-water composition where relative volatility is highest. In the... 

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