TWO STEP OPTIMIZATION FOR LIQUEFACTION OF BIOMASS
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United States of America Patent
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Issued Date -
May 7, 2015
app pub date -
Apr 30, 2013
filing date -
Apr 30, 2012
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Abandoned
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Abstract
The present invention describes a process involving liquefaction of a biomass slurry by treatment in hot compressed water (HCW), said process comprising: —a first decomposition step being performed at an average pH level of at most 4.5, wherein a hemicellulose fraction in the biomass slurry is decomposed to water soluble mono- and/or oligomers, and wherein a cellulose fraction undergoes a pre-treatment for decrystallization of the cellulose polymer; —a separation step; and —a second decomposition step, wherein the cellulose fraction in the biomass slurry is decomposed to water soluble mono- and/or oligomers; wherein both of the first and second decomposition steps are performed at sub-critical temperatures implying relatively moderate conditions.
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