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Phosphonium-based ionic liquids and their use in the capture of polluting gases

United States Patent

9,670,237
June 6, 2017
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
An ionic liquid composition having the following chemical structural formula: ##STR00001## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are independently selected from hydrocarbon groups containing at least 1 and up to 20 carbon atoms, and X.sup.- is a cyclic anion that possesses a negatively-charged group reactive with a gaseous electrophilic species, particularly carbon dioxide or sulfur dioxide. Methods for capturing a gaseous electrophilic species, such as CO.sub.2 or SO.sub.2, by contacting the gaseous electrophilic species with an ionic liquid according to Formula (1) are also described.
Dai; Sheng (Knoxville, TN), Wang; Congmin (Hangzhou, CN), Luo; Huimin (Knoxville, TN), Jiang; De-en (Knoxville, TN)
UT-BATTELLE, LLC (Oak Ridge, TN)
13/ 240,275
20130078170
September 22, 2011
This invention was made with government support under Prime Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.