Page 84 - Distillation theory

P1: JPJ/FFX P2: FCH/FFX QC: VINOD/IYP T1: FCH
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58 Trajectories of Distillation in Infinite Columns Under Infinite Reflux

2

a)

(2)
x
D
x (1) 123
D
12
23
1 4

134
x (2)
B
13
34
(1)
B x 3
2

x (2)
D
(1)
B x
b) 12
23
234
x (1)
D

1 4
123
x (2)
B
13

34
3
Figure 3.14. Examples of determination whether the feed points
x F belong to distillation regions Reg ∞ and what are the compo-
sitions of x D and x B products at direct x D(1) : x B(1) and indirect
x D(2) : x B(2) splits of the mixture of (a) acetone(1)-methanol(2)-
chloroform(3)-ethanol(4), the region 12 ⇒ 13; (b) isopropanol(1)-
benzene(2)-cyclohexane(3)-n-butanol(4), the region 123 ⇒ 4. The
distillation regions boundaries are shaded; the thick lines stand for
distillation region frames.

region the given feed compositions belong to for four-component mixtures with
several binary and ternary azeotropes and the boundaries of the distillation re-
gions found with the adjacent regions Reg ∞ : (1) for the mixture acetone(1)-
bound
methanol(2)-chloroform(3)-ethanol(4) of composition x F (0.65, 0.15, 0.15, 0.05),