Abstract: The invention relates to a process for the manufacture of a starch hydrolysate having a high content of dextrose from a liquefied starch milk, comprising the steps consisting in carrying out a saccharification of a liquefied starch milk with the aid of a glucogenic enzyme so as to obtain a syrup having a richness in dextrose of between 75 and 90% by weight, preferably of between 80 and 90% by weight, a first separation by membrane nanofiltration of the saccharified hydrolysate thus obtained so as to recover a nanofiltration retentate and a nanofiltration permeate, this permeate constituting a starch hydrolysate having a content of dextrose greater than 95% by weight, preferably greater than 96% by weight, and more preferably still greater than 97% by weight, and a second separation by membrane nanofiltration of the preceding nanofiltration permeate so as to obtain the said starch hydrolysate having a high content of dextrose.

Abstract: The invention relates to a method of manufacturing a maltose-rich syrup, comprising the successive stages consisting of: (a) carrying out a liquefaction of a starch milk; (b) carrying out a saccharification of the liquefied starch milk in the presence of a maltogenic &agr;-amylase; (c) continuing the saccharification of the liquefied starch milk in the presence of a &bgr;-amylase and at least one debranching enzyme chosen from the group consisting of pullulanases and isoamylases with a view to obtaining a syrup which is rich in maltose.

Abstract: A process for the preparation of D-arabitol, characterised in that it comprises the following stages:hydrolysis of a lactose solution,oxidation of the mixture of glucose and galactose thus obtained to a mixture of gluconic and galactonic acids,decarboxylation of this mixture of gluconic and galactonic acids to a mixture of D-arabinose and D-lyxose,catalytic hydrogenation of this mixture of D-arabinose and D-lyxose to D-arabitol.

Abstract: The invention relates to a process for continuous separation of mixtures of sugars and/or polyols. The mixture is fed to an installation comprised of at least 3 adsorbent filled columns connected in series. The columns represent absorption, enrichment and desorption zones respectively. The process provides for the continuous sequential operation of the columns as absorption, enrichment and desorption zones.