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Method of making alkyl esters

United States Patent

September 14, 2010
View the Complete Patent at the US Patent & Trademark Office
Methods of making alkyl esters are described herein. The methods are capable of using raw, unprocessed, low-cost feedstocks and waste grease. Generally, the method involves converting a glyceride source to a fatty acid composition and esterifying the fatty acid composition to make alkyl esters. In an embodiment, a method of making alkyl esters comprises providing a glyceride source. The method further comprises converting the glyceride source to a fatty acid composition comprising free fatty acids and less than about 1% glyceride by mass. Moreover, the method comprises esterifying the fatty acid composition in the presence of a solid acid catalyst at a temperature ranging firm about C. to about C. to produce alkyl esters, such that at least 85% of the free fatty acids are converted to alkyl esters. The method also incorporates the use of packed bed reactors for glyceride conversion and/or fatty acid esterification to make alkyl esters.
Elliott; Brian (Wheat Ridge, CO)
TDA Research, Inc. (Wheat Ridge, CO)
11/ 381,924
May 5, 2006
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made, at least in part, with funding from the Department of Energy Contract No. DE-FG02-04ER86169, Accordingly, the U.S. government may have certain rights in the invention.