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US 2015/0148531 A1Published application
Method for the manufacture of carbonyl derivatives of polysaccharides
AssigneeTeknologian tutkimuskeskus VTT Oy
InventorsHannu Mikkonen (deceased), Sauli Vuoti
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Abstract
The invention relates to a method for the manufacture of carbonyl derivatives of polysaccharides and to the oxidization of polysaccharides in the presence of nitrogen dioxide to yield carbonyl derivatives of polysaccharides. The products including carbonyl derivatives of polysaccharides, obtained by the method are also described.
Claims13
A method for the manufacture carbonyl derivatives of polysaccharides, characterized in that said method comprises the steps where:
- in the first step nitric acid is allowed to react with elemental copper under gas atmosphere comprising oxygen to yield nitrogen oxide, which is converted to nitrogen dioxide when reacting with oxygen, the formed nitrogen dioxide is dried, and
- in the second step the dry nitrogen dioxide is allowed to react with at least one polysaccharide to yield carbonyl derivatives of polysaccharides.
Dependencies are inferred from the claim text.