| 摘要 |
<p>Method for oxidising carbohydrates having a primary hydroxyl group, such as starch, inulin and fractions and derivatives thereof, by treatment with hypohalite in the presence of a catalytic amount of ditertiary-alkyl nitroxyl, in particular 2,2,6,6-tetramethylpiperidin-1-oxyl, in a water-containing medium at pH 9-13. The catalytic amount of nitroxyl is, in particular, 0.1-2.5 % by weight based on the carbohydrate. The oxidation leads to products having a high content (> 90 %) of carboxyl groups, without significant chain breakdown.</p> |
