Excess enthalpies of the ternary mixtures: ethyl tert-butylether + n-heptane + (n-decane or n-dodecane) at 298.15 K

2001 ◽  
Vol 79 (4) ◽  
pp. 388-393 ◽  
Author(s):  
Zhaohui Wang ◽  
Yoshiteru Horikawa ◽  
George C Benson ◽  
Benjamin C Lu
Keyword(s):  
Physical Properties ◽  
Ternary Systems ◽  
Excess Molar Enthalpies ◽  
Ternary Mixtures ◽  
Excess Enthalpies

Excess molar enthalpies, measured at 298.15 K in a flow microcalorimiter, are reported for the two ternary systems, ethyl tert-butylether + n-heptane + n-decane and ethyl tert-butylether + n-heptane + n-dodecane. Smooth representations of the results were used to construct constant enthalpy contours on Roozeboom diagrams. It is shown that useful estimates of the ternary enthalpies can be obtained from the Liebermann–Fried model using only the physical properties of the components and their binary mixtures.Key words: excess enthalpies, ternary mixtures, ethyl tert-butylether, n-alkanes, Liebermann–Fried model.

Excess enthalpies of ternary mixtures of an n-alkane with methyl tert-butyl ether and di-n-butyl ether

1997 ◽  
Vol 75 (3) ◽  
pp. 308-313 ◽  
Author(s):  
Zhangfa Tong ◽  
Dankui Liao ◽  
George C. Benson ◽  
Benjamin C. Y. Lu
Keyword(s):  
Ternary Systems ◽  
Excess Molar Enthalpies ◽  
Ternary Mixtures ◽  
Methyl Tert Butyl Ether ◽  
Excess Enthalpies ◽  
Butyl Ether ◽  
Flory Theory ◽  
Tert Butyl

Excess molar enthalpies, measured at 298.15 K, are reported for the two ternary systems consisting of either n-heptane or n-decane, together with methyl tert-butyl ether and di-n-butyl ether. Smooth representations of the results were used to construct constant enthalpy contours on Roozeboom diagrams. It was found that the Flory theory can provide good estimates of the ternary enthalpies. Keywords: excess enthalpies, ternary mixtures, n-alkanes, ethers, Flory theory.

Thermodynamics of organic mixtures containing amines. IV. Systems with aniline

2005 ◽  
Vol 83 (10) ◽  
pp. 1812-1825 ◽  
Author(s):  
Juan Antonio González ◽  
Ismael Mozo ◽  
Isaías García de la Fuente ◽  
José Carlos Cobos
Keyword(s):  
Binary Systems ◽  
Ternary Systems ◽  
Ternary Mixtures ◽  
Excess Enthalpies ◽  
Dipolar Interactions ◽  
Organic Mixtures ◽  
Molar Excess ◽  
Binary And Ternary Mixtures ◽  
Benzene Toluene ◽  
Vapor Liquid Equilibria

Binary mixtures of aniline with benzene, toluene, alkane, alkanol, or N,N-dialkylamide have been investigated in the framework of the DISQUAC model. The reported interaction parameters change regularly with the molecular structure of the mixture components. The model consistently describes a set of thermodynamic properties including liquid–liquid equilibria, vapor–liquid equilibria, and molar excess enthalpies. The two latter properties for ternary systems are well-represented by DISQUAC using binary parameters only (i.e., neglecting ternary interactions). A comparison of DISQUAC results and those obtained from the UNIFAC (Dortmund version) and ERAS models is also shown. The experimental molar excess enthalpies for binary and ternary mixtures are better described by DISQUAC than by UNIFAC. ERAS fails when representing molar excess enthalpies of those binary systems including methanol or ethanol. This may be due to the existence of strong dipolar interactions among aniline molecules as well as to effects related to the equation of state term, evaluated comparing molar excess enthalpies, and molar excess internal energies at constant volume. The study of the aniline systems in terms of the concentration–concentration structure factor also underlines the importance of dipolar interactions in solutions with alkanes or alcohols, which may be due to the high polarizability of the aniline molecule.Key words: thermodynamics, mixtures, aniline, dipolar interactions, structural effects.

Catalytic hydrogenation of binary and ternary mixtures of unsaturated substances in the liquid phase on platinum

1979 ◽  
Vol 44 (8) ◽  
pp. 2378-2383 ◽  
Author(s):  
Libor Červený ◽  
Radka Junová ◽  
Vlastimil Růžička
Keyword(s):  
Liquid Phase ◽  
Binary Mixtures ◽  
Silica Gel ◽  
Catalytic Hydrogenation ◽  
Ternary Systems ◽  
Ternary Mixtures ◽  
Unsaturated Alcohol ◽  
Solvent Concentration ◽  
Binary And Ternary Mixtures ◽  
Hydrogenation Selectivity

Hydrogenation of olefinic substrates in binary and ternary mixtures using 5% Pt on silica gel as the catalyst was studied in normal conditions in the liquid phase with methanol or cyclohexane or in solvent-free systems. The effect of the solvent concentration on the selectivity of hydrogenation of the unsaturated alcohol-olefin binary mixtures was investigated. In ternary systems of unsaturated substrates, the effect of each of the substrates on the selectivity of hydrogenation of the remaining two substances was examined. Another system was found in which a jump change of the hydrogenation selectivity occurred on the vanishing of the fastest reacting substance.

Solvent Flooding Displacement Efficiency in Relation to Ternary Phase Behavior

1972 ◽  
Vol 12 (02) ◽  
pp. 89-95 ◽  
Author(s):  
Ahmad H.M. Totonji ◽  
S.M. Farouq Ali
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
Phase Behavior ◽  
Ternary Phase ◽  
Ternary Systems ◽  
Ternary Mixtures ◽  
Displacement Mechanism ◽  
Irreducible Water Saturation ◽  
Experimental Runs

Abstract The chief objective of the study was to exercise control on the system phase behavior through the use of mixtures of two alcohols exhibiting opposite phase behavior characteristics in the alcohol-hydrocarbon-water system involved. Such systems were employed in displacements in porous media to ascertain their effectiveness. Introduction Displacement of oil and water in a porous medium by a mutually miscible alcohol or other solvent has been the subject of numerous investigations. This process, in spite of its limited scope as an oil recovery method, has certain mechanistic features that are of value in gaining an understanding of some of the newer recovery techniques (e.g., the Maraflood* process). The works of Gatlin and Slobod, proposing piston-like displacement of oil and water by a miscible alcohol; of Taber et al., describing the displacement mechanism in terms of the ternary phase behavior involved; and of Holm and Csaszar, defining displacement mechanism in terms of phase velocity ratio, are major contributions in this area. In a later work, Taber and Meyer suggested the addition of small amounts of oil and water (as the case may be) to the alcohol used for displacement, since this helped to obtain piston-like displacements with systems that are usually characterized by the efficient displacement of either oil or water. APPARATUS, EXPERIMENTAL PROCEDURE, AND SIMULATOR PROCEDURE, AND SIMULATOR The procedure employed for determining the equilibrium phase behavior of ternary systems involved the titration of a hydrocarbon-water (or brine) mixture by the particular solvent (pure alcohol, or alcohol mixture) for the determination of the binodal curve, and the analysis by refractive index measurement of ternary mixtures having known compositions for the determination of the tie lines. Since the procedure is valid for strictly ternary systems, its use in this case where essentially quaternary systems are involved would yield the total alcohol content rather than the correct proportion of each alcohol. The ternary diagrams presented should be viewed with this limitation in mind. presented should be viewed with this limitation in mind. The apparatus used for experimental runs in porous media consisted of a positive displacement Ruska pump and a core encased in a steel pipe. Suitable sampling apparatus and auxiliary equipment were employed. Most runs consisted of injecting a slug of the particular solvent into a core initially containing a residual oil (waterflood) or irreducible water saturation, at a constant rate, and then following the slug by water or brine. The effluent samples collected were analyzed for the hydrocarbon, water and alcohol in order to plot the production histories. Complete experimental details and fluid production histories. Complete experimental details and fluid properties are given in Ref. 6. Table 1 lists the properties properties are given in Ref. 6. Table 1 lists the properties of the porous media used. Computer simulations of some of the experimental runs, as well as exploratory simulations, were carried out using the method earlier reported. The method basically consists in the representation of a porous medium by a certain number of cells containing immobile oil (or oleic) and water (or aqueous) fractions into which alcohol is injected in a stepwise manner allowing for phase changes. SPEJ P. 89

scholarly journals Excess Enthalpies of Binary and Ternary Mixtures Containing Dibutyl Ether, Cyclohexane and 1-Butanol at 298.15 K

2009 ◽  
Vol 54 (8) ◽  
pp. 2341-2342 ◽  
Author(s):  
Fernando Aguilar ◽  
Fatima E. M. Alaoui ◽  
Cristina Alonso-Tristán ◽  
José J. Segovia ◽  
Miguel A. Villamañán ◽  
...  
Keyword(s):  
Ternary Mixtures ◽  
Excess Enthalpies ◽  
Dibutyl Ether ◽  
Binary And Ternary Mixtures

scholarly journals The multivariate calculation of material balances of flowsheets for separating ternary mixtures of different physical-chemical nature

2016 ◽  
Vol 11 (3) ◽  
pp. 47-57 ◽  
Author(s):  
A. V. Frolkova ◽  
M. A. Ablizin ◽  
M. A. Mayevskiy ◽  
A. K. Frolkova
Keyword(s):  
Phase Diagrams ◽  
Chemical Nature ◽  
Material Balance ◽  
Ternary Systems ◽  
Butyl Alcohol ◽  
Ternary Mixtures ◽  
Two Phase ◽  
Physical Chemical ◽  
Alcohol Water

An approach to the determination of free variables required for calculating the material balance of the flowsheet of ternary mixtures separation is presented. Phase diagrams of the considered ternary systems are characterized by the presence of a two-phase splitting area and by the presence of different amounts of azeotropes (classes 3.1.0, 3.1.1, 3.2.1 and 3.3.1). For all the systems flowsheets containing three rectification columns and a florentine vessel for separation were suggested. The multivariance of the solution of the balance problem was shown. The approach was illustrated by the example of real ternary systems characterized by different phase diagrams (methanol - chloroform - water, butyl alcohol - water - toluene, nitromethane - hexane - water). The parameters of the rectification columns were presented.

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