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Methods for recovering a solvent from a fluid volume and methods of removing at least one compound from a nonpolar solvent

United States Patent

June 10, 2014
View the Complete Patent at the US Patent & Trademark Office
Biodiesel – SSC Process
A method of removing a nonpolar solvent from a fluid volume that includes at least one nonpolar compound, such as a fat, an oil or a triglyceride, is provided. The method comprises contacting a fluid volume with an expanding gas to expand the nonpolar solvent and form a gas-expanded solvent. The gas-expanded solvent may have a substantially reduced density in comparison to the at least one nonpolar compound and/or a substantially reduced capacity to solubilize the nonpolar compound, causing the nonpolar compounds to separate from the gas-expanded nonpolar solvent into a separate liquid phase. The liquid phase including the at least one nonpolar compound may be separated from the gas-expanded solvent using conventional techniques. After separation of the liquid phase, at least one of the temperature and pressure may be reduced to separate the nonpolar solvent from the expanding gas such that the nonpolar solvent may be recovered and reused.
Ginosar; Daniel M. (Idaho Falls, ID), Wendt; Daniel S. (Idaho Falls, ID), Petkovic; Lucia M. (Idaho Falls, ID)
Battelle Energy Alliance, LLC (Idaho Falls, ID)
13/ 177,962
July 7, 2011
GOVERNMENT RIGHTS This invention was made with government support under Contract No. DE-AC07-05ID14517 awarded by the U.S. Department of Energy. The government has certain rights in the invention.