Question

II. Solve the following numerical: 1. An aqueous solution of a valuable solute © with an initial concentration 1.2 weight % subjected to a liquid liquid extraction with a solvent with which it is immiscible. The equilibrium data under the operating conditions are given below. (20 marks) (0) Represent the process by a neat Block diagram. (ii) Determine the Composition of the extract and raffinate phase if 600 kg of feed solution is extracted once with 700 kg solvent. Estimate the amount of solvent required if 83 % of the solute is to be removed in a single stage for part (ii). (iv) Estimate the Average composition of the combined extract if two theoretical extractions using 120 kg solvent each are used. 0 0.001 0.002 0.005 0.007 0.01 Mass fraction of solute in aqueous layer Mass fraction of solute in extract layer 0 0.001 0.002 0.005 0.007 0.01