New method for the hydrolysis of the polysaccharides 27.

摘要

The invention relates to a novel method for the controlled hydrolysis of a polysaccharide in the solid state in the presence of an acidic gas such as NO2. The invention also relates to a novel method for obtaining oligosaccharides by depolymerization of natural polysaccharides. This method is carried out by means of a heterogeneous chemical reaction which takes place in a gaseous medium under the action of nitrogen dioxide (NO2 and N2O4) or other acidic gases. In particular, by controlling various parameters, against all expectations, the reaction results in functionalized or unfunctionalized oligosaccharides of defined and reproducible size and DO (degree of oxidation).