Title: raffinate
Long Title: IUPAC Gold Book - raffinate
DOI: 10.1351/goldbook.R05122
Status: current

Definition
The phase remaining after extraction of some specified solute(s). When necessary it should be further specified, e.g. scrub raffinate. The original meaning of raffinate as a 'refined product' has become extended and changed by common usage. The term should normally be applied only to waste streams but the latter may form the feed to a further extraction process for another solute.

Related Term
- extraction: https://goldbook.iupac.org/terms/view/E02301

Source
- PAC, 1993, 65, 2373. 'Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)' on page 2388 (https://doi.org/10.1351/pac199365112373)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/R05122/html
- json: https://goldbook.iupac.org/terms/view/R05122/json
- xml: https://goldbook.iupac.org/terms/view/R05122/xml

Citation: Citation: 'raffinate' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.R05122
License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms.
Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .
Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2026-06-28T14:09:46+00:00