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PHOSPHONIUM-BASED IONIC LIQUIDS AND THEIR USE IN THE CAPTURE OF POLLUTING GASES

United States Patent Application

20130078170
A1
View the Complete Application 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 (OAKRIDGE TN)
13/ 240,275
September 22, 2011
[0001] 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.