Process for producing 1,1-gpm- and/or 1,6-gps-enriched isomalt compositions

A method for producing 1,1-GPM- and/or 1,6-GPS-enriched isomalt compositions from an isomalt-containing solution, characterised in that

• a) an isomalt-containing solution is provided, wherein the isomalt-containing solution has 65 to 90 wt. % isomalt (based on the total weight of the isomalt-containing solution);
• b) the isomalt-containing solution provided in method step a) is subjected to flash evaporation in a reactor for crystal nucleation to obtain a first isomalt-containing suspension comprising a first crystalline phase and a first liquid phase;
• c) the first isomalt-containing suspension obtained in method step b) is subjected to a crystallisation process whereby a second isomalt-containing suspension comprising a second crystalline phase and a second liquid phase is obtained, wherein the second crystalline phase is 1,1-GPM-enriched and the second liquid phase is 1,6-GPS-enriched;
• d) the 1,1-GPM-enriched second crystalline phase of the second isomalt-containing suspension of method step c) is separated from the 1,6-GPS-enriched second liquid phase;
• and
• e) 1,1-GPM- and/or 1,6-GPS-enriched isomalt compositions are obtained.