Method of extracting butyric acid from a fermented liquid and chemically converting butyric acid into biofuel
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United States of America Patent
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May 20, 2014
Grant Date -
Dec 1, 2011
app pub date -
Mar 27, 2009
filing date -
Mar 28, 2008
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Abstract
Disclosed is a method of converting butyric acid contained in a fermentation broth into biofuel. This chemical conversion method includes separating biohydrogen from gases generated in the course of production of butyric acid through fermentation of carbohydrate, extracting butyric acid from the broth using an insoluble solvent, esterifying butyric acid thus producing butylbutyrate, and hydrogenolyzing all or part of butylbutyrate, thus obtaining butanol. Thereby, biobutanol can be efficiently and economically produced, and butylbutyrate, which has oxidation stability superior to that of conventional biodiesel (fatty acid methyl ester) and is thus regarded as novel biofuel, can be produced together.
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