Question

M3. EXTRACTION (5 p) 1. Fill in the blanks as shown below: is the distance of displacement of the liquids in the column due to the movement of the reciprocating piston of the pump during a cycle. b) The highest mass transfer performance will be achieved in regime. c) In extraction the separation of compounds is based on the differences in whereas in distillation it is based on the differences in volatilities. d) In an extraction column, the transfer rate of solute is proportional to the and (15 p) 2. Benzoic acid is extracted from water by means of pure kerosene in a pulsed perforated plate column (height of 1 m) working counter-currently. The concentration of benzoic acid at the inlet and exit streams is determined by titration method using 0.01 mol/L NaOH solution. 10 mL sample is taken from each stream for the titration and the results for both phases obtained are as follows: V (inlet water) - 22.13 ml: V outlet water) V (outlet kerosene) = 20.5 mL 2.5 ml If the equilibrium line equation is C = 1.2 Cs, where Cs and Cy are concentrations of benzoic acid in water (kg BA/m3 H20) and kerosene (kg BA/m3 kerosene). respectively: a) Find the number of stages (NTS) present in the column b) Find the height equivalent to a theoretical stage (HETS). Data (MW) = 122 kg/kmole ( Microne= 168 kg/kmole De 1000 kg/m Purme=760 kg/m

Answer 1

Answer 1

Part a

Engine capacity is the distance of displacement of liquid in the column due to the movement of reciprocating piston of the pump during a cycle.

Part b

highest mass transfer performance will be achived in turbulent flow regime.

Part c

In extraction the separation of compunds is based on the differences of relative solubilities.

Part d

in extraction column transfer rate of solute is proportional to actual and equilibrium solute concentration.