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METHODS AND SYSTEMS FOR TREATING LIQUIDS USING SWITCHABLE SOLVENTS

United States Patent Application

20130048561
A1
View the Complete Application at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
A method of treating a liquid. The method comprises providing a feed liquid comprising at least one solvent and at least one solute to a first side of a membrane. A single-phase draw solution comprising at least one of an aminium salt, an amidinium salt, and a guanidinium salt is provided to a second side of the membrane. The at least one solvent is osmosed across the membrane and into the single-phase draw solution to form a diluted single-phase draw solution. At least one of CO.sub.2, CS.sub.2, and COS is removed from the diluted single-phase draw solution to form a first multiple-phase solution comprising a first liquid phase comprising the at least one solvent, and a second liquid phase comprising at least one of an amine compound, an amidine compound, and a guanidine compound. A liquid purification system is also described.
Wilson, Aaron D. (Idaho Falls, ID), Stewart, Frederick F. (Idaho Falls, ID), Stone, Mark L. (Idaho Falls, ID)
BATTELLE ENERGY ALLIANCE, LLC (IDAHO FALLS ID)
13/ 480,053
May 24, 2012
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] This invention was made with government support under Contract Number DE-AC07-05ID14517 awarded by the United States Department of Energy. The government has certain rights in the invention.