(Answered) Percentage of the oil entering in the livers

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Problem: 700 lblhr of hatibut liver is to be extracted in a countercurrent cascade with ether to recover the oil. The ether, which has been partially purified, contains 2 per cent oit. The fresh 1ivers contain 2O per cent oil and are to be extracted to a composition of 1 per cent oil (on a solvent-free basis). 500 lb of solvent is to be used.

Required:

Question 1: What percentage of the oil entering in the livers is recovered in the extract?

Question 2: How many equilibrium stages are required? Please explain your answer and also provide examples

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