Answer Happy

TUTORIALPROBLEM: Question 1 A distillate containing 45 wt% of iso-propanol (IPA), 50 wt% di-iso-propyl ether (DIPE), and 5 wt% Water (W) is obtained from the heads column of an IPA finishing unit. The company desires to recover the ether from this stream by L-L Extraction in a column with water as the solvent. If 100 kg/hr of the distillate enters the extractor, how much solvent should be used if the raffinate is to contain no more than 2.5 wt% of the ether. The following information is provided: Tie Line Data is given below: (RAFFINATE) IPA Phase (wt %) (EXTRACT) Water Phase (wt% ) DIPE DIPE IPA Water IPA 2.4 96.7 0.9 8.1 1.8 3.2 95.7 1.1 8.6 1.8 5.0 93.6 1.4 10.2 1.5 9.3 88.6 2.1 11.7 1.6 24.9 69.4 5.7 17.5 1.9 38.0 50.2 11.8 21.7 2.3 45.2 33.6 21.2 26.8 3.4 Additional points on the bimodal curve: DIPE (wt% ) Water (wt% ) 45.37 24.93 44.55 33.00 39.57 47.01 36.23 54.11 24.74 72.52 21.33 76.61 0 99.4 0 0.5 IPA (wt% ) 29.70 22.45 13.42 9.66 2.74 2.06 0.6 99.5 Water 90.1 89.6 88.3 86.7 80.6 76.0 69.8