1. A continuous fraction distillation column 45% benzene with a flow rate of 30,000 kg/h

and 55% toluene, 97% benzene in the upper product and 98% in the lower product by weight.

It will be designed to separate to contain toluene. Recovery (reflux) rate, 1 mole of product

determined to be 3.3 for Benzene and toluene have a relative volatility of 2.3 constitutes an ideal system. Molal latent heat values for benzene and toluene are 7360, respectively and 7960 cal/gmol. The molecular weights for benzene and toluene are 78 and 92, respectively g/mol. The feed has a boiling point of 95C at 1 atm pressure.

a) Calculate the amount of upper and lower product in mol/h.

b) Specify the ideal number of stages and the stage where the feed is made for the following three different situations.

Please specify.

i) Liquid at feed boiling point

ii) Feed liquid at 20C (specific heat 0.44 cal/gC)

iii) A mixture of two-thirds liquid and one-third steam of the feed

c) 20 lbf/in2 for heating If steam with a gauge pressure of (1.36 atm) is used, reduce heat losses.

ignoring it and assuming the reflux is a saturated liquid, the above How much steam is required per hour for each of the three states?

d) If the cooling water enters the condenser at 30C and leaves at 45C, how many cubic meters per hour? Need cooling water?