Process for purifying lactulose syrup

摘要

A process for purifying commercial lactulose in the form of syrup, comprising a first stage of chemical oxidation with bromine or electrochemical oxidation in the presence of sodium bromide, followed by treating the obtained aqueous solution with ion exchange resins in the following order: strong cationic resins of H+ form weak anionic resin of OH- form strong anionic resin of bisulphite form strong cationic resin of H+ form weak anionic resin of OH- form.