Switchable Water

  • Author: ChemViews
  • Published Date: 12 October 2010
  • Source / Publisher: ChemSusChem/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
thumbnail image: Switchable Water

Related Societies

“Salting out” is a standard method for separating water-soluble organic compounds from water. Salt is added to increase the polarity of the water, forcing the organic solute out of the aqueous solution. The water that remains, however, cannot be recycled or discarded without treatment.

Sean Mercer and Philip Jessop, Queen’s University, Canada, report examples of switchable ionic strength water through addition of amines. Aqueous solutions of N,N,N’,N’-tetramethyl-1,4-diaminobutane were capable of dissolving a large amount of the test organic compound, THF. Exposing the solution to CO2 triggered a change in the aqueous solution ionic strength so that the organic compound was forced out of solution. The change was reversible through heating or sparging with N2 or air to remove the CO2, although the reverse process was incomplete.

Article Views: 4608

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission and consult our permission guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH