| 摘要 |
<p>Sulphation of carbohydrate gums (poly-saccharides) without significantly modifying the basic carbohydrate structure is carried out in a solvent contng., as sulphating agent, the reaction product of SO3 and a Lewis base. The carbohydrate is made ready for this process by the following treatment: Water-swollen gum particles are suspended in a water-miscible substitute liquid. This liquid does not exhibit an irreversible reaction with the sulphating agent. Its vapour pressure is below that of water and it is miscible with the solvent for the sulphating agent or is the same as this solvent. When the substitute liquid is removed, water-free particles which are suitably activated for the above sulphation process are obtained. Claimed uses include application as suspension agent in a beverage comprising cocoa particles, milk and sweetener, and as binding agent in toothpaste. Mol. structure of the starting carbohydrates is largely preserved. Characteristics are improved, including suspension props in water.</p> |
