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[raf-uh-neyt] /ˈræf əˌneɪt/
noun, Chemistry
the part of a liquid, especially an oil, remaining after its more soluble components have been extracted by a solvent.
Origin of raffinate
1925-30; < French raffin(er) to refine (r(e)- re- + affiner to refine; see affine) + -ate1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for raffinate
  • raffinate was separated out and stored in open pits.
  • After contacting the aqueous solution with the organic extractant, the resulting extract and raffinate phases are separated.
  • The raffinate is refortified with sulfuric acid and circulated back to the active leach areas.
  • In effect, the volume of raffinate flowing from the mill to the evaporation ponds will be disposed of via evaporation.
British Dictionary definitions for raffinate


the liquid left after a solute has been extracted by solvent extraction
Word Origin
C20: from French raffiner to refine + -ate1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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raffinate in Science
The portion of an original liquid that remains after other components have been dissolved by a solvent. The term is often used to refer to the oil that is not dissolved in petroleum refining operations.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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