In particular, the invention relates to a process for obtaining oligo - mannuronates saturated and / or unsaturated, characterized by the fact that it consists in using the following steps: a) dispersed in an acid medium and hot of brown algae, at a ph of less than or equal to 2; b) to separate, in particular by filtration, the insoluble fraction of the soluble fraction originating from step a), the insoluble fraction containing, in particular, the algal cellulose of the algae, and the blocks α - 1 - guluronic (g) and β - d - mannuronic (m); c) to adjust the ph of the insoluble fraction to approximately 2, 8 by adding a base; d) separating, in particular by filtration, the insoluble fraction of the soluble fraction originating from step c), the soluble fraction containing the blocks of acid (β - d - mannuronic (m); e) subjecting the soluble fraction recovered in step d) to a depolymerization by acid, or by an enzymatic route or by means of a mixed acid / enzymatic, so as to collect the oligo - mannuronates saturated and / or unsaturated.
展开▼
