Purification of polydextrose by reverse osmosis

Details Purification of polydextrose by reverse osmosis Purification of polydextrose by reverse osmosis

C - Chemistry, Metallurgy

08

B

260/212, 182/15.

C08B 37/00 (2006.01) B01D 61/02 (2006.01)

Patent

CA 1325981

ABSTRACT The present invention is a process for purifying polydextrose to remove manufacturing contaminants such as glucose, sorbitol, citric acid, oligomers, 1,6-anhydro- glucose, 5-hydroxymethylfurfural and other low molecular weight constituents by reverse osmosis wherein an aqueous solution of polydextrose is filtered by pressing it tangentially over a porous membrane at high pressure. This inventive process produces a purified polydextrose with the 1,6-anhydroglucose content therein reduced to less than about 0.2% (W/W) and a reduction in the 5-hydroxymethylfurfural content to below detectable levels or less than about 0.01% (W/W), thereby virtually eliminating any bitter taste or musty off-flavor.

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