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An Extraction-Distillation Process A mixture containing 50,0 wt% acetone (A) and 50.0 wt% water (W) is to be separated into two streams-one rich in acetone and the other in water. The separation process consists of extraction of the acetone from the water into methyl isobutyl ketone (MIBK or M), which has a much higher affinity for acetone than it does for water. The process is shown schematically below. M (solvent) M (solvent) Feed Raffinate 1 Raffinate 2 MIXER MIXER 50% A. 50% W Mostly W and A 93.1% W some M and A SETTLER SETTLER Extract 1 Extract 2 Mostly M, some A and W Mostly M and A Am acetone (solute) W water (diluent) M MIBK (solvent) Product: 97% A, 2% M, 1% W Combined extract Most of A in feed, M DISTILLATION COLUMN Recovered solvent Mostly M, some A and W 7 For example, a solvent extraction process was (R. I. Mateles, Ed., Penicillin: A Paradigm for Biotechnology, Candida Corporation, Chicago, IL, 1998.) a key development in the large-scale production of penicillin in the 1940s.

Answer 1

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