Physical Properties of Ternary Systems - Specific Gravities, Refractive Indices, and Changes in Volume on Solution of the System Methyl Alcohol-Water at 60 degrees F.

1934 ◽  
Vol 26 (4) ◽  
pp. 392-395 ◽  
Author(s):  
Donald M. Smith
Author(s):  
A. V. Frolkova ◽  
M. A. Ablizin ◽  
M. A. Mayevskiy ◽  
A. K. Frolkova

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.


2000 ◽  
Vol 78 (8) ◽  
pp. 1121-1127 ◽  
Author(s):  
Alberto G Camacho ◽  
Miguel A Postigo ◽  
Graciela C Pedrosa ◽  
Inés L Acevedo ◽  
Miguel Katz

Excess molar volumes and excess refractive indices of the n-octanol + 1,4-dioxane + 2-butanol system and the three corresponding binary mixtures have been determined at 298.15 K by measuring densities and refractive indices. Different expressions exist in the literature to predict these excess properties from binary data. An estimation of excess molar volumes is also evaluated using a modified Heller equation which depends on the refractive indices of the mixtures. A comparison of the predictions of different methods with the experimental values of the physical properties has been made.Key words: excess molar volumes, densities, refractive indices, n-octanol, 1,4-dioxane, 2-butanol, ternary system.


2010 ◽  
Vol 42 (6) ◽  
pp. 764-772 ◽  
Author(s):  
Yan-Hong Zhou ◽  
Shu-Ni Li ◽  
Quan-Guo Zhai ◽  
Yu-Cheng Jiang ◽  
Man-Cheng Hu

The physical properties of solutions of electrolytes in non-aqueous solvents have been investigated in the past by a number of workers, but until recently the work in this field has been characterised to some extent by lack of accuracy and of co-ordination. The need for accurate experimental work in this direction is clear when it is realised that modern theories of the behaviour of electrolytes in solution are based almost entirely on data obtained for solutions in water. It is probable that a more complete understanding of the nature of solutions can come only through experimental work extending over a range of solvents: the peculiar properties of water as a solvent have tended hitherto to obscure many of the fundamental difficulties of the problem by cloaking them in the garb of simplicity. The work which forms the substance of this paper was undertaken with a view to obtaining some systematic data for the electrical conductivity of dilute solutions of uni-univalent salts in a non-aqueous solvent, of an accuracy comparable with that of Kohlrausch and his co-workers in the case of aqueous solutions. The choice of methyl alcohol as a solvent was governed by the fact that it is most closely allied to water in type, and is experimentally well suited for such an investigation.


1878 ◽  
Vol 26 (179-184) ◽  
pp. 290-297

Most of the following determinations were made two years ago.They were not published at once, because the results showed more variation than was expected. They are now made known for two reasons. First, most of the glasses examined are articles of commerce, and can be readily obtained by any person experimenting upon the physical properties of glass; these glasses only vary within narrow limits, and their variations may be approximately allowed for by a knowledge of their density. Second, most of the prisms having three angles from each of which determinations were made, the probable error of the mean is very small, and any error of the nature of a blunder is certainly detected. The form in which to present these results was a matter of much consideration. A curve giving the refractive indices directly is unsuitable, for the errors of observation are less than the errors of curve-drawing would be. The theory of dispersion is not in a position to furnish a satisfactory rational formula.


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