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  • Author or Editor: A. Ait Kaci x
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Résumé  

Liquid-liquid phase diagrams have been determined for binary systems of pyridine+n-hexane, pyridine+n-heptane and pyridine+n-dodecane. A general quasi-chemical theory in terms of group surface interactions has been applied to compute these liquid-liquid phase diagrams.

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Abstract  

Heats of mixingH E at 298.15 K and 1 atm are reported for the ternary liquid mixture of cyclohexane (1) + benzene (2) + 1-chlorobutane (3). A Redlich-Kister type of equation was used to represent and correlate the results.

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Abstract  

The authors have measured the vapour pressure of the binary four systems, piperidin +1,4-dioxan, piperidin+tetrahydropyran, piperidin+tert-butyl methyl ether and N-methyl piperidin+tert-butyl methyl ether. The measurements were carried out using an isoteniscope built by J. Jose [1]. The vapour pressure, excess Gibbs free energies at 298.15 K, 303.15 K, 313.15 K, 323.15 K, 333.15 K and 343.15 K, are reported for these mixtures. The excess Gibbs free energies have been fitted to the Redlich-Kister equation.

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Abstract  

Heats of mixing HE at 303.15 K and 1.013 bar are reported for two ternary liquid mixtures piperidine(1)+n-heptane(2)+cyclohexane(3) and piperidine(1)+n-octane(2)+cyclohexane(3). A Redlich-Kister type smoothing equation was used to represent and correlate the results. A dispersive quasichemical (DISQUAC) theoretical model was used for predicting the heats of mixing HE at 303.15 K and 1.013 bar for these two ternary liquid mixtures.

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Abstract  

Solid-liquid phase diagrams have been determined for binary systems of pyridine withn-alkanes. These diagrams show the existence of large regions of partial miscibility. A general quasi chemical theory in terms of group surface interactions [1] has been applied to compute these solid-liquid phase diagrams.

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Abstract  

The excess molar enthalpy of thiophen and diethylsulfid with some n alkanes have been measured at 303.15 K and 1 atm. A Redlich—Kister type equation was used to represent and correlate the results. Empirical equations of group contribution model, disquac have been applied for the binaries systems.

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Abstract  

Heats of mixing H E at 303.15 K and 1 atm are reported for two ternary liquid mixtures piperidine(1)+ benzene(2)+cyclohexane(3) and piperidine(1)+benzene(2)+n -octane(3). A Redlich-Kister type smooting equation was used to represent and correlate the results.

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Abstract  

Experimental heats of mixing Δmix H at 303.15 K and normal atmospheric pressure were obtained for the binary mixtures cyclohexanone+(1,2-dichloroethane, 1,1,1-trichloroethane, 1,1,2-trichloroethane,1,1,2,2-tetrachloroethane or pentachloroethane), using a Calvet microcalorimeter. The Δmix H values for all the mixtures were negative, indicated that important interaction occur between the ketoxy group and chloroalcane.

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