Method of treating biomass material
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United States of America Patent
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Nov 22, 1994
Issued Date -
N/A
app pub date -
Jun 8, 1993
filing date -
Mar 23, 1979
priority date (Note) -
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Abstract
Two stage hydrolysis of lignocellulosic material, conditions during the first stage being such as to hydrolyze or depolymerize the hemicellulosic component without substantial degradation of resulting monosaccharides, conditions during the second stage being such as to hydrolyze the cellulose to glucose without substantial degradation of the glucose. The solids left after first stage hydrolysis are disintegrated mechanically thereby greatly facilitating second stage hydrolysis. Hydrolysis in both stages is preferably accomplished by the use of nitric acid. The pH retention time and temperature in both stages are selected to maximize production of the desired monosaccharide or monosaccharides.
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