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Process for producing biodiesel, lubricants, and fuel and lubricant additives in a critical fluid medium

United States Patent

May 3, 2005
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Deployment Office Website
Biodiesel – SSC Process
A process for producing alkyl esters useful in biofuels and lubricants by transesterifying glyceride- or esterifying free fatty acid-containing substances in a single critical phase medium is disclosed. The critical phase medium provides increased reaction rates, decreases the loss of catalyst or catalyst activity and improves the overall yield of desired product. The process involves the steps of dissolving an input glyceride- or free fatty acid-containing substance with an alcohol or water into a critical fluid medium; reacting the glyceride- or free fatty acid-containing substance with the alcohol or water input over either a solid or liquid acidic or basic catalyst and sequentially separating the products from each other and from the critical fluid medium, which critical fluid medium can then be recycled back in the process. The process significantly reduces the cost of producing additives or alternatives to automotive fuels and lubricants utilizing inexpensive glyceride- or free fatty acid-containing substances, such as animal fats, vegetable oils, rendered fats, and restaurant grease.
Ginosar; Daniel M. (Idaho Falls, ID), Fox; Robert V. (Idaho Falls, ID)
Bechtel BWXT Idaho, LLC (Idaho Falls, ID)
09/ 554,708
July 31, 2000
CONTRACTUAL ORIGIN OF THE INVENTION The United States has rights in this invention pursuant to Contract No. DE-AC07-94D13223 between the U.S. Department of Energy and Lockheed Martin Idaho Technologies Company.