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Production of biodiesel using expanded gas solvents

United States Patent

April 7, 2009
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
Biodiesel – SSC Process
A method of producing an alkyl ester. The method comprises providing an alcohol and a triglyceride or fatty acid. An expanding gas is dissolved into the alcohol to form a gas expanded solvent. The alcohol is reacted with the triglyceride or fatty acid in a single phase to produce the alkyl ester. The expanding gas may be a nonpolar expanding gas, such as carbon dioxide, methane, ethane, propane, butane, pentane, ethylene, propylene, butylene, pentene, isomers thereof, and mixtures thereof, which is dissolved into the alcohol. The gas expanded solvent may be maintained at a temperature below, at, or above a critical temperature of the expanding gas and at a pressure below, at, or above a critical pressure of the expanding gas.
Ginosar; Daniel M. (Idaho Falls, ID), Fox; Robert V. (Idaho Falls, ID), Petkovic; Lucia M. (Idaho Falls, ID)
Battelle Energy Allicance, LLC (Idaho Falls, ID)
11/ 123,607
May 6, 2005
GOVERNMENT RIGHTS The United States Government has certain rights in this invention pursuant to Contract No. DE-AC07-05ID14517 between the United States Department of Energy and Battelle Energy Alliance, LLC.