Question: Two materials, A and B, are to be separated using two unit operations, 1 and 2. The feed has 10 tons/h A and 4 tons/h

Two materials, A and B, are to be separated using two unit operations, 1 and 2. The feed has 10 tons/h A and 4 tons/h B.

The split (fraction of material rejected by each operation) is given in Table P6-14.

Table P6-14 Split (fraction rejected) by unit operation Material 2 A 0.2 

a. Which sequence of operations, (1 → 2) or (2 → 1), will yield the greatest recovery of material A?

b. What will be the purity of material A using that sequence?

c. What will be the efficiency of separation for the entire process train with regard to material A using the Worrell- Stessel equation?

Table P6-14 Split (fraction rejected) by unit operation Material 2 A 0.2 0.5 B 0.4 0.8

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