Process for purifying lactulose syrup

C - Chemistry – Metallurgy – 13 – K

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260/231, 204/82

C13K 5/00 (2006.01) C07H 3/04 (2006.01) C13K 13/00 (2006.01)

Patent

CA 1223581

ABSTRACT 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 resin of H+ form - wear anionic resin of OH- form - strong anionic resin of bisulphite form - strong cationic resin of H+ form - weak anionic resin of OH- form

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