Page 132 - Distillation theory

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106 Trajectories of Thermodynamically Reversible Distillation

2. Can trajectory bundle of reversible distillation go outside the boundaries of dis-
tillation region Reg ?
∞
3. Let K 2 > K 3 > K 1 in the feed point. In which regions of components order Reg
ord
can be located: (1) top reversible section trajectory, (2) bottom reversible section
trajectory, (3) intermediate reversible section trajectory?
4. Answer the same question as in item 3 for a four-component mixture, in the
feed point of which K 3 > K 2 > K 4 > K 1 (in extractive distillation column, the top
product is component 3 and the entrainer is mixture 1, 4).
5. In face of concentration tetrahedron 2-3-4, there is a region of components order
2413
Reg . What should be the top product and the entrainer for this region to be the
ord
trajectory tear-off region Reg t(3) ?
rev,e
6. What minimum information is necessary to define the contour of possible product
region Reg or Reg in face 1-3-4 of concentration tetrahedron 1-2-3-4?
D B

4.11. Exercises with Software
1. Calculate α-lines for the faces of the concentration tetrahedron of a mixture of
acetone(1)-benzene(2)-chloroform(3)-toluene(4).
2. Construct reversible distillation trajectories for points x D : (1) 0.5, 0.0, 0.5, 0.0; (2)
0.05, 0.95, 0.0, 0.0; (3) 0.0, 0.5, 0.5, 0.0 of the above-mentioned mixture.

3. Do the same for points x B : (1) 0.0, 0.5, 0.0, 0.5; (2) 0.0, 0.9, 0.1, 0.0; (3) 0.0, 0.0,
0.03, 0.97.

References
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Gurikov, Yu. V. (1958). Some Questions Concerning the Structure of Two-Phase
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Haselden, G. (1958). Approach to Minimum Power Consumption in Low-
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