Question: 2. Benzoic Acid (BA) is continuously extracted from toluene using a two- stage co- current mode of operation under steady state conditions using water as

2. Benzoic Acid (BA) is continuously extracted from toluene using a

2. Benzoic Acid (BA) is continuously extracted from toluene using a two- stage co- current mode of operation under steady state conditions using water as solvent. Each stage consists of a mixer and settler. The upper toluene layer and the lower water layer are removed separately. a) Develop a mathematical model to find the total fraction of BA extracted by clearly mentioning the assumptions involved in the analysis. b) Identify the dimensionless group in the final expression and explain their physical significance. Compare the performance of cross-current, counter-current and co-current modes of operation, if m=1/8 and c=0.1kg/m3 and S=12R

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