PROCESS FOR PREPARING HIGH PURITY LACTULOSE SYRUP AND THE SYRUP OBTAINED

摘要

A process for preparing high-purity lactulose by the following stages: a) diluting with water to a concentration of 15-25% a syrup containing 45-55% of lactulose and having a lactulose content on a dry substance basis of between 74 and 82% w/w; b) pretreating the diluted syrup with bromine or bifunctional boron resins; c) treating the pretreated syrup from stage b) with ion exchange resins of strong anion type under conditions such that the pH of the percolated syrup is between 8 and 10. l