Question: Why is solvent extraction the unit operation by which soluble components of a liquid mixture are dissolved in a liquid that is partially immiscible with

  1. Why is solvent extraction the unit operation by which soluble components of a liquid mixture are dissolved in a liquid that is partially immiscible with the other components?
  2. Why are high selectivity, low viscosity, large distribution coefficient, and high interfacial tension the best combination of properties for a good solvent for extraction
  3. Why does fractional solvent extraction employ two solvents?
  4. Why is there no selectivity when the ratio of the two components in the extraction solvent phase to that in the feed solvent phase is 1.0?

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