Binary benzene/ethylbenzene

Abstract Infrared spectroscopic methodsfor the measurement of adsorption and adsorption kinetics of some aromatics (benzene, ethylbenzene, p-xylene), pyridine, and paraffins in solid microporous materials such as zeolites (MOR, ZSM-5, silicalite-1) are described as well as the evaluation of the spectroscopically obtained data. The adsorption isotherms are of the Langmuir-Freundlich type. Isosteric heats of adsorption, transport diffusivities, and activation energies of diffusion as deduced from the spectroscopic measurements are compared with literature data as far as available, and they are found to be in reasonable agreement with results provided by independent techniques. Special attention is paid to sorption and sorption kinetics of binary mixtures, especially the problems of co- and counter-diffusion. ... 

The IR technique also enables us to determine the adsorption and desorption of binary mixtures, provided the IR spectra of the two components were sufficiently different so that the spectra of the mixtures could be reliably decomposed. This was, e.g., the case for the pairs benzene/ethylbenzene, benzene/p-xylene, and ethylbenzene/p-xylene (compare, e.g.. Figs. 3 and 16). 

Al-Kandary, J., Al-Jimaz, A.S., and Abdul-Latif, A.-H.M. Densities, viscosities, and refractive indices of binary mixtures of anisole with benzene, methylbenzene, ethylbenzene, propylbenzene, and butylbenzene at (293.15 and 303.15) K, /. Chem. Eng. Data, 51(1) 99-103, 2006. 

Asmanoca, N. and Goral, M. Vapor pressmes and excess Gibbs energies in binary mrxtmes of hydrocarbons at 313.15 K. 1. Methylcyclohexane-benzene, -toluene, -o-xylene, /rxylene, -ethylbenzene, and -propylbenzene, J. Chem. Eng. Data, 25(3) 159-161, 1980. 

Bjola, B.S., Siddiqi, M.A., and Svejda, P. Excess enthalpies of binary liquid mixtures of y-butyrolactone + benzene. + toluene, -t ethylbenzene, and -t carbon tetrachloride, and excess volume of the y-butyrolactone + carbon tetrachloride liquid mixture, / Chem. Eng. Data, 46(5) 1167-1171, 2001. 

The LLE of twenty binary systems containing [CglTj30ClT2-Cilm][BFJ with aliphatic hydrocarbons (n-pentane, n-hexane, n-heptane, or n-octane) and aromatic hydrocarbons (benzene, toluene, ethylbenzene, o-xylene, m-xylene, or p-xylene) were presented [78]. Also, the mixtures of [CglTj30ClT2-Qlm][Tf2N]... 

Table 8 shows the results for the separation of monosubstituted benzenes using DCA as the host. In the binary systems containing benzene, benzene was excluded from the DCA crystal, with the resulting separation factors less than unity. This makes a complete contrast to the previous results with CA. Two guests, toluene and ethylbenzene, were preferentially included in the DCA crystal. The order of preferential inclusion in DCA can be described as follows ... 

Figure 2.7 Representation of the PBTK model developed for a mixture of 5 VOCs (m-xylene, toluene, ethylbenzene, benzene, and dichloromethane). All binary interactions that occur at the level of the rate of metabolism (RAM) are taken into account between the mixture constituents as shown by the dotted arrows. Because all chemicals interact by competitive inhibition, the Km of all mixture constituents is modulated by the presence of other chemicals as can be seen in the RAM equations. Cvl refers to venous blood concentrations. Vmax and Km refer to the maximal rate of metabolism and Michaelis affinity constant, respectively. Kuj is the constant describing competitive inhibition of the metabolism of chemical i by chemical j. (Figure adapted from Krishnan et al. [2002]).

Krishnan and colleagues developed an approach to the PBPK analysis of complex mixtures in which the toxicologic interactions of binary mixtures are first combined in the affected and modeled target tissue [30]. An example for a mixture of volatile organic chemicals (m-xylene, toluene, ethylbenzene, dichlo-romethane, and benzene) that interact via competitive inhibition was devel-oped.The approach requires thatPBPKmodels be available for each component models are interconnected by Kt values and, naturally, by substrate concentrations—here, in the liver. It is necessary that all binary interactions be characterized. For a mixture of n components, the number of binary interaction experiments performed to determine K, values will be n(n - 1)12. While not indicated, it seems that some reduction of resources would be... 

Fig. 18 Sorption isosteres of the sorbate ethylbenzene from simultaneous sorption of the binary mixture of ethylbenzene and benzene pressure as a function of the reciprocal temperature at constant loading (in mmolg" ) (1) 0.10 (2) 0.15 (3) 0.20 (4) 0.25 (5) 0.30...

Ort a, J. Placido, J. Excess enthalpies of 12 binary liquid mixtures of. alpha.,.omega.-dichlotDalkanes (C2, C4, C6) + benzene, toluene, ethylbenzene, orbutylbenzene at 298.15 KELDATAInt. Electron. J. Phys.-Chem. Data 1996,2,111-120... 

Comelli, F. Francesconi, R. Castellari, C. Excess molar enthalpies for binary mixtures containing ethylbenzene or (2-chloroethyl)benzene + five methyl alkyl ketones J. Chenu Eng. Data 1993,38, 224-226... 

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