Method for processing aqueous sugar juice for separating ketose
AssigneeInstitut National Polytechnique De Toulouse
InventorsLouis F. Jo, Marie E. Borredon, Michel Delmas, Antoine Gaset
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Abstract
A method for processing aqueous sugar juice containing a mixture of aldehyde-function saccharides and ketonic-function saccharides for separating and selecting ketonic-function saccharides, comprising (a) producing a hydro-organic medium by mixing the juice with an active methylene ketonic compound, a calcium-based catalyst and preferably ethanol, (b) mixing the medium until furanic polyalcohol is formed by condensation of the ketonic compound and the aldehyde-function saccharides and (c) allowing the furanic polyalcohol to precipitate and separating it by physical means from the liquid medium.
Claims11
A process for the treatment of aqueous sugar juice containing a mixture of ketose and aldose sugars for separating the ketose sugar therefrom comprising:
- preparing a reactive hydro-organic medium containing water by mixing the sugar juice with an active methylene ketone compound, a catalyst consisting essentially of a calcium salt, and an alcohol selected from the group consisting of ethanol and methanol,
- heating said medium to a temperature between 40.degree. C. and the reflux temperature of said medium for a period of about four to eight hours for producing a condensation of the ketone compound and the aldose with the formation of corresponding furanic polyols,
- cooling said medium to precipitate the furanic polyols, and
- separating the resulting precipitate from the residual liquid medium containing the ketose.
Dependencies are inferred from the claim text.