2. An oily plant containing 22% oil by weight is extracted with pure hexane and the amount of oil is reduced to 0.8 kg oil/100 kg inert solid. 1000 kg of hexane is used for every 1000 kg of inert soybeans.

The downstream data are given in the table.

kg oil/kg solution 0 0.2 0.3

Solvent holding solution (kg)/ solid (kg) 0.578 0.658 0.699

a) Calculate the amounts and compositions of the streams per 1000 kg of inert feed.

b) Calculate what percentage of the oil in the oily plant is recovered with the solvent.

c) Determine the ideal number of steps using the graphic method.

2. An oily plant containing 22% oil by weight is extracted with pure hexane and the amount of oil is reduced to 0.8kg oil/ 100kg inert solid. 1000kg of hexane is used for every 1000kg of inert soybeans. (60P) 0 0,2 0,3 1.a) Calculate the amounts and compositions of the streams per 1000kg of inert feed. 2. b) Calculate what percentage of the oil in the olly plant is recovered with the solvent. 3. c) Determine the ideal number of steps using the graphic method