Polysaccharide components dissolved into chlorite Liquor under various treating conditions in the process of delignification with acidic sodiumn chlorite at 70°C were investigated for Akamatsu wood meal.
The determination of lignin contents in the residual meal treated with sodium chlorite showed that the acid soluble portion of the remaining lignin was maximum at near 50% delignification.
The polysaccharide components were isolated as precipitates from the solution by adding ethanol, and their carbohydrate compositions and contents were analyzed and determined by means of gas liquid chromatography after changing them into alditol acetates. The results revealed that the amounts of galactose and arabinose residues were rich in the polysaccharide fractions isolated from the solution at the early stage of delignification and furthermore the residues of mannose, glucose and xylose increased with progress of the delignification, while those of galactose and arabinose decreased.
