Example 4.2. HNO, and 8 wt% water, by mixing You are asked to make 1,000 kg of the mixed acid containing 60 wt% H,SO, 32 wt% i) mixed acid containing 11.3% HNO,, 44.4% H,sO,, and 44.3% water, ii) 90% HNO, aqueous solution, and iii) 98% H,SO, aqueous solution Calculate mas s of Streams i, ii, and iii

3, A mixture containing 40 kg A and 60 kg B is contacted with a pure solvent in a single-stage process. The relative content of A and B in extract phase (y /yR) is 7/3. The relative content of A and B in raffinate phase (x,/xp) is 1/4. Determine (1) the quantity of extract liquid E°; (2) the quantity of raffinate liquid R°; (3) Selectivity factor B. B.

A saturated vapor feed that is 90 %mol maleic anhydride and 10%mol benzoic acid is distilled at 99.8 torr to give a distillate that is 99.5 %mol maleic anhydride and a bottoms that is 0.5 %mol maleic anhydride. How many equilibrium stages are needed using a reflux ratio that is 1.6 times the minimum?  The solution is ideal in both vapor and liquid stages. Vapor pressures can be estimated with the following Antoine equations in °C and torr:  Maleic anhydride: ?(saturation)= exp (16.6541 − 4.088.12/(T+203.924)) Benzoic acid: ?(saturation)= exp (23.0155 − 9336.97/(T+321.434)

A liquefied mixture of n-butane, n-pentane, and n-hexane has the following composi- tion in percent: n-C,H10 50 n-C3H12 30 n-C,H14 20 For this mixture, calculate: (a) The weight fraction (b) The mole fraction (c) The mole percent of each component (d) The average molecular weight