Process for recovery of formic acid
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United States of America Patent
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Sep 10, 2013
Grant Date -
Jun 9, 2011
app pub date -
Apr 21, 2009
filing date -
Apr 21, 2008
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Abstract
The invention relates to a process for the recovery of concentrated high purity formic acid having a concentration of at least 50%, most preferably at least 95%, from biomass wherein an aqueous liquid mixture containing levulinic acid and possibly furfural is subjected to a liquid-liquid extraction step, followed by the recovery of furfural, formic acid and levulinic acid.
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