Interactive Self-Study Module: Hunter-Nash Method for Liquid-Liquid Extraction

Overview:

This module uses screencasts and an interactive simulation to explain how to use the Hunter-Nash Method for liquid-liquid extraction. It then provides example problems and step-by-step quiz simulations to allow the user to test themselves. Your retention of material in this module will increase if you write down reasons for your answers to ConcepTests, questions in screencasts, and questions to answer before using interactive simulation(s), and you try to solve the example problems before watching the screencast solutions. We suggest using the learning resources in the following order:

  1. Attempt to answer the multiple-choice ConcepTest and the example problem before watching the screencasts or working with the simulations.
  2. Watch the screencasts that describe the Hunter-Nash method and answer the questions within the screencasts.
  3. Review important equations for the Hunter-Nash method for liquid-liquid extraction.
  4. Use the interactive simulation(s) to further understand liquid-liquid extraction.
  5. Use the quiz interactive simulations to test your understanding by carrying out a step-by-step preparation of a ternary phase diagram and applying the Hunter-Nash method.
  6. Try to solve the example problems before watching the solutions in the screencasts.
  7. Answer the ConcepTests.
  8. Look at the list of key points, but only after you try to list the key points yourself.
Motivation:
  • This module is intended for a separations course.
Before studying this module, you should be able to:
After studying this module, you should be able to:
  • Graphically locate the mixing point on a ternary phase diagram.
  • Graphically locate the operating point on a ternary phase diagram.
  • Determine the extract composition for liquid-liquid extraction, given feed and solvent compositions and flow rates, and the desired raffinate composition.
  • Use mass balances and ternary phase diagrams to determine the outlet compositions from a liquid-liquid extraction.
  • Use a ternary phase diagram to determine the number of stages needed for liquid-liquid extraction.