Process for producing ethanol from corn dry milling
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United States of America Patent
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Jul 11, 2006
Grant Date -
Jun 5, 2003
app pub date -
Oct 9, 2002
filing date -
Mar 11, 1999
priority date (Note) -
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Abstract
A process for producing ethanol by the conversion of carbohydrates from a corn dry milling process in which the bottoms fraction from distillation of ethanol in a conventional yeast fermentation is used in a process including a combination of biochemical and synthetic conversions. The process results in high yield ethanol production with concurrent production of high value coproducts. An acetic acid intermediate is produced from bottoms fraction, followed by conversion of the acetic acid into ethanol using esterification and hydrogenation reactions. Coproducts of the process include a high protein content solids fraction produced in the fermentation.
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