Page 234 - Distillation theory

P1: FCH/FFX P2: FCH/FFX QC: FCH/FFX T1: FCH
0521820928c06 CB644-Petlyuk-v1 June 11, 2004 20:17

208 Distillation Trajectories in Infinite Complex Columns and Complexes

S x
x
y x L 1 B 2 s x y x B 2
D F D L 1 S
s
a) x E x b) x x
L
2
12 23 L 2 F
x x
F x F
F + E x F + E 23
x x x
B L 2 B
x 12
L 1
123 qS y
m
D '
x y x = x D
2
L
E D
1 3 1 13 3
13 x L1 = x E 123
y x x B 2 y x x B 2
D L 1 S D L 1
s
c) x x x d) x S
F L 2 F L 2 s
x x
F F
x
F + E 23
x x x F + E
B B
12
y D
x = x ' x = '
L 2 D L 2 x L
1 13 3 1 13 3
x = x 123
L 1 E
x = x y
L 1 E S D
r
x x D x
2 D 2 D
x
e) D f ) x F
x
x L 1
F
S S
r r
x x
L 1 L 2
x x F x
x F B
B x
L 2
1 13 3 1 13 3
x S x x x L x ' x L 2
L 1 B L 2 B 1 s S B x
s
Figure 6.16. Trajectories of heteroazeotropic distillation: (a) distillate from azeocolumn to de-
canter for separation toluene(1)-ethanol(2)-water(3) mixture; (b) distillate from azeocolumn
to decanter and a recycle stream of the entrainer from decanter to azeocolumn for separation
benzene(1)-isopropanol(2)-water(3) mixture; (c) distillate from azeostripping to decanter and
a recycle stream of the entrainer from decanter to azeostripping for separation benzene(1)-
isopropanol(2)-water(3) mixture; (d) distillate from azeocolumn to decanter and a recycle
stream of the entrainer from decanter to azeocolumn for separation acetic acid(1)-n-butyl
acetate(2)-water(3) mixture; (e) bottom from azeocolumn to decanter for separation butanol(1)-
acetone(2)-water(3) mixture; and (f) side product from azeocolumn to decanter for separation
butanol(1)-acetone(2)-water(3) mixture. Regions of two liquid phases Reg L1–L2 are shaded.