Extraction

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QUESTION (ASSIGNMENT 5)
8000 kg/h of an acetic acid-water solution containing 30% acid is to be
countercurrently extracted with isoprophyl ether to reduce the acid
concentration to 2% in the solvent-free raffinate product.
a) Determine the minimum amount of solvent
b) The number of theoretical stages if 20000 kg/h of solvent is used
Draw the tie line in the diagram if a 20000 kg/h solvent is used.

FRIDAY, 23 DECEMBER 2011 AT 4 PM
TEST 2
WDK-14
DISTILLATION AND ABSORPTION

EQUILIBRIUM DATA
Water layer (wt%)
AA
water
0.69
98.1
1.41
97.1
2.89
95.5
6.42
91.7
13.3
84.4
25.5
71.1
36.7
58.9
44.3

45.1

46.4

37.1

IPE
1.21
1.49
1.61
1.88
2.3
3.4
4.4

Isoprophyl ether layer (wt%)
AA
water
IPE
0.18
0.5
99.32
0.37
0.7
98.93
0.79
0.8
98.41
1.93
1
97.07
4.82
1.9
93.28
11.4
3.9
84.7
21.6
6.9
71.5

10.6

31.1

10.8

58.1

16.5

36.2

15.1

48.7

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