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Electrochemical method for producing a biodiesel mixture comprising fatty acid alkyl esters and glycerol

United States Patent

August 13, 2013
View the Complete Patent at the US Patent & Trademark Office
The present invention relates to an integrated method and system for the simultaneous production of biodiesel from free fatty acids (via esterification) and from triglycerides (via transesterification) within the same reaction chamber. More specifically, one preferred embodiment of the invention relates to a method and system for the production of biodiesel using an electrodeionization stack, wherein an ion exchange resin matrix acts as a heterogeneous catalyst for simultaneous esterification and transesterification reactions between a feedstock and a lower alcohol to produce biodiesel, wherein the feedstock contains significant levels of free fatty acid. In addition, because of the use of a heterogeneous catalyst, the glycerol and biodiesel have much lower salt concentrations than raw biodiesel produced by conventional transesterification processes. The present invention makes it much easier to purify glycerol and biodiesel.
Lin; YuPo J. (Naperville, IL), St. Martin; Edward J. (Libertyville, IL)
UChicago Argonne, LLC (Chicago, IL)
12/ 767,168
April 26, 2010
STATEMENT OF GOVERNMENTAL SUPPORT This invention was made during work supported by the U.S. Department of Energy under Contract No. Contract No. DE-AC02-06CH11357. Therefore, the United States Government has certain rights to this invention.