Coordinates, Janecke rectangular

Janecke Coordinates (10). Because of crowding on the triangular coordinates, the rectangular plot of Janecke is particularly useful for this case since the calculator is not limited to the single size of graph paper... 

Figure 14.1. Equilibria in a ternary system, type 1, with one pair of partially miscible liquids A = 1-hexene, B = tetramethylene sulfbne, C = benzene, at 5(TC (JR.M. De Fre, thesis, Gent, 1976). (a) Equilateral triangular plot point P is at 20% A, 10% B, and 70% C. (b) Right triangular plot with delines and tieline locus, the amount of A can be read off along the perpendicular to the hypotenuse or by difference, (c) Rectangular coordinate plot with tieline correlation below, also called Janecke and solvent-free coordinates.

Evaluation of the numbers of stages also can be made on rectangular distribution diagrams, with a McCabe-Thiele kind of construction. Example 14.5 does this. The Janecke coordinate plots like those of Figures 14.1 and 14.2 also are convenient when many stages are needed, since then the triangular construction may... 

Plot the binodal curve and tie lines and (a) triangular coordinates and (h) rectangular coordinates of Janecke. 

Odier representations of eqnilibiinm data are in conunon use. For example, a Hand plot is often attractive as wdl as distribution dmgtams and the use of other coordinate systems (e.g., rectangular or Janecke coonUnates). Since die use of these systems has been described in detail elsewhere, they simply are mentioned here. 

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