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Title: Switchable solvents and methods of use thereof

Patent ·
OSTI ID:1019418
 [1];  [2];  [2];  [3]
  1. Kingston, CA
  2. Atlanta, GA
  3. Richland, WA
+ Show Author Affiliations

A solvent that reversibly converts from a nonionic liquid mixture to an ionic liquid upon contact with a selected trigger, e.g., contact with CO.sub.2, is described. In preferred embodiments, the ionic solvent is readily converted back to the nonionic liquid mixture. The nonionic liquid mixture includes an amidine or guanidine or both, and water, alcohol, or a combination thereof. Single component amine solvents that reversibly convert between ionic and non-ionic states are also described. Some embodiments require increased pressure to convert; others convert at 1 atmosphere.

Research Organization:
Univ. of California (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FG02-99ER14986
Assignee:
Queen's University at Kingston (Kingston, CA); Georgia Tech Research Corporation (Atlanta, GA)
Patent Number(s):
7,982,069
Application Number:
US Patent Application 11/717,172
OSTI ID:
1019418
Country of Publication:
United States
Language:
English

References (11)

Green chemistry: Reversible nonpolar-to-polar solvent journal August 2005
Brønsted Guanidine Acid−Base Ionic Liquids:  Novel Reaction Media for the Palladium-Catalyzed Heck Reaction journal February 2006
Amidines. Part 41. Effects of substitution at the amidino carbon atom and at the imino nitrogen atom on the preferred configuration at the CN bond in the 13C NMR spectra of N 1,N 1-dimethyl-N 2-alkylamidines
  • Jaroszewska-Manaj, Jolanta; Oszczapowicz, Janusz; Makulski, Włodzimierz
  • Journal of the Chemical Society, Perkin Transactions 2, Issue 7 https://doi.org/10.1039/b009497h
journal January 2001
The Reaction of 1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) with Carbon Dioxide journal June 2005
Amidines. Part 13. Influence of substitution at imino nitrogen atom on pK a values of N 1 N 1 -Dimethylacetamidines journal January 1984
A Rapid Gas Chromatographic Analysis of Diastereomeric Diamines journal March 1975
Activation of Carbon Dioxide by Bicyclic Amidines journal November 2004
Spontaneous and Reversible Switch from Amphiphilic to Oil-Like Structures journal November 2005
Hydrogenation of Carbon Dioxide Catalyzed by Ruthenium Trimethylphosphine Complexes:  The Accelerating Effect of Certain Alcohols and Amines journal July 2002
Dimethylammonium-dimethylcarbamat (Dimcarb) als Lösungs- und Extraktionsmittel journal February 1989
Switchable Surfactants journal August 2006

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY