extraction

It is desired to remove acetic acid from water by extraction using isopropyl ether at 25 C and 1 atm. The initial water to be treated is 650 kg/h, containing 45 wt % acetic acid and 55 wt % water. This is to be extracted using 850 kg/h of pure isopropyl ether. The final water product (raffinate) from a countercurrent train of mixer/settlers is to contain no more than 5 wt% acetic acid. (a) Using Figure 3, construct the equilibrium tie lines and determine the number of stages required. (12 Marks) (b) Analyse the extract and raffinate layer to compute the composition of Vand Li (7 Marks) 100 . wt. % .6 % % % 8 8 8 8 . 0 10 20 30 40 50 60 wt. % 60 50 40 wt.% 30 20 10 0. 0 10 20 30 40 50 60 wt. % Figure 3: Acetic acid-water-isopropyl ether phase diagram at 298K