Page 192 - Distillation theory

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166 Distillation Trajectories and Conditions of Mixture Separability

4. Name known to you regions in concentration simplex influencing distillation pro-
cess. Give definitions of these regions, and describe their properties and signifi-
cance.
R
5. What is the difference between working region of the section Reg , rectifying or
w
stripping separatrix sharp split region Reg sh,R , and rectifying or stripping sepa-
sep
ratrix min-reflux region Reg min,R ? What is the dimensionality of these bundles?
sep
What is their significance?

5.10. Exercises with Software
1. For mixture acetone(1)-benzene(2)-chloroform(3)-toluene(4) of composition
(0,2; 0,4; 0,1; 0,3), calculate the mode of minimum reflux for the split 1,3 : 2,4
and find location of trajectories of the sections in the concentration simplex.
2. Determine other possible sharp splits for this mixtures, calculate the minimum
reflux mode for each.
3. Do the same as in Exercise 1 for mixture pentane(1)-hexane(2)-heptane(3)-
octane(4) of composition (0,35; 0,25; 0,15; 0,25) at split 1,2 : 3,4.
4. Do the same for the latter mixture at split 1,2 : 2,3,4 and at x D2 = 0,15.
5. Dothesameforthismixtureforthesplit1,2,3:3,4atequalandoptimaldistribution
of component 3 among the products.
6. Do the same for this mixture for the splits 1 : 2,3,4 and 1,2,3 : 4.

References
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