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Separation Process Engineering: Includes Mass Transfer Analysis, Third Edition by Phillip C. Wankat

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D. Problems

*Answers to problems with an asterisk are at the back of the book.

D1. In Example 13-1 we assumed that we were going to use all of the solvent available. There are other alternatives. Determine if the following alternatives are capable of producing outlet water of the desired acetic acid concentration.

a. Use only the pure solvent at the bottom of the extractor.

b. Mix all of the pure and all of the impure solvent together and use them at the bottom of the column.

c. Mix all of the pure and part of the impure solvent together and use them at the bottom of the column.

D2. Repeat Example 13-2 but use a countercurrent cascade with all of the solvent (E = 20 kg/h) flowing countercurrent to the feed through the two stages.

D3. Acetic acid ...

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