PROCESS FOR TREATING PRODUCTS RICH IN PLANT CELL WALLS, IN PARTICULAR RICH IN PECTINS, SAID PECTINS, THE EXTRACTION RESIDUES FROM THE PROCESS, THEIR USE AND COMPOSITIONS CONTAINING THEM

摘要

The starting product is rich in broken-down plant cell walls. Water is added, if necessary, to otbain a mixture suitable for the subsequent shearing treatment. The product is subjected to a shearing stress before extrusion, to obtain a modified product containing a water-soluble polysaccharide fraction greater than that which exists in nature, without changing the overall chemical composition. The modified product is obtained in the form of crushable aggregates. It then undergoes aqueous extraction to yield a water-soluble fraction and an extraction residue. If the starting product is derived from higher plants naturally rich in pectins, the latter (which have a dry matter content of at least 70 %) are extracted from the water-soluble fraction by precipitation by an alcohol or by its multivalent salts. The extraction residue consists of edible fibres.