It is desired to separate acetone from methyl isobutyl ketone in single stage extractor using pure water as a solvent. If the raffinate and extract products are to contain 18 and 12 wt% acetone respectively, find the mixing point if the composition of acetone was 35 wt% in the original feed composition. Also find the composition of water in both the outlet streams (raffinate and extract).

Question
Asked Oct 13, 2019
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It is desired to separate acetone from methyl isobutyl ketone in single stage extractor using pure water as a solvent. If the raffinate and extract products are to contain 18 and 12 wt% acetone respectively, find the mixing point if the composition of acetone was 35 wt% in the original feed composition. Also find the composition of water in both the outlet streams (raffinate and extract).

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Expert Answer

Step 1

Extraction is process of separating solute from the mixture of solute and solvent with the help of another insoluble solvent without chemical reaction.

It is also known as mixer-settler process first solute, solvent is mixed with insoluble solvent and then mixture allowed to settle down and due to density difference two phases formed and separated.

Step 2

Feed consist of carrier liquid (methyl isobutyl ketone) and solute (acetone) is extracted with the help of insoluble solvent ( water).

Let molar flow rate of feed stream (F)  = 100 mol/h

      Molar flow rate of solvent stream (SS) = 100 mol/h

 

Extract (E)
Raffinate (R)
F 100mol/h
Ss-100 mol/h
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Extract (E) Raffinate (R) F 100mol/h Ss-100 mol/h

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Step 3

Mixer stream is the result of mixing of feed steam and solvent stream whi...

M-F+S
mol
mol
+100
=100
mol
=200
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M-F+S mol mol +100 =100 mol =200

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