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There are many steps in solvent extraction:

  1. Extraction
  2. Scrubbing
  3. Back extraction

I understand the 1st and the 3rd. What is the principle of scrubbing? Is it just washing the organic phase? How undesirable species get removed from organic phase?

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    $\begingroup$ "Scrubbing" is (in chemical technology) a method that removes a gaseous compound. I have never heard the term used in pure chemistry. Can you please give some context? $\endgroup$ – Karl Mar 29 '19 at 7:41
  • $\begingroup$ Dictionary.com confirms that (4)dictionary.com/browse/Scrubbing I suppose it is used in transferred meaning, dealing with the emulsion of the other solvent and mainly with other co-extracted components. $\endgroup$ – Poutnik Mar 29 '19 at 12:37
  • $\begingroup$ As noted by Karl, scrubbing is usually used to describe a process in which a liquid is used to clean (scrub) a gas. $\endgroup$ – Charlie Crown Mar 30 '19 at 2:55

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