200 kg/h of a benzene and triethylamine (TMA) solution (30 wt % TMA) are to be separated by a liquid-liquid extraction process using pure water as a solvent. The water free reffinate should contain 5 wt% TMA. a) Calculate the minimum amount of solvent water corresponding to an infinite number of stages. For this amount of solvent what is the corresponding composition of extract? (b) Use a flowrate of solvent (pure water) equal to 130 kg/h to calculate the compositions and amounts of the ether extract and the aqueous raffinate. How many stages are required to achieve the desired raffinate composition?

 

Transcribed Image Text:

90 80 70 60 50 40 30 20 100 Water 0 10 20 20 TMA 10 10 0 100 90 30 30 40 200 80 50 50 70 70 60 60 60 890 50 40 70 80 60 30 20 10 0 90 100 Benzene 90 80 70 60 50 40 30 20 100 Water 0 10 20 20 TMA 10 10 0 100 90 30 30 40 200 80 50 50 70 70 60 60 60 890 50 40 70 80 60 30 20 10 0 90 100 Benzene