Process for decolorization of solutions
AssigneeCultor Ltd.
InventorsHannu A. Paananen, Tong Wen
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Abstract
The invention relates to a process for decolorization of solutions of sugars, sugar alcohols and betaine. In accordance with the process, a polyaluminium chloride is added to a solution of sugar, sugar alcohol or betaine having a dry substance content of 10 to 70% by weight and a temperature of 60 to 105.degree. C. in a suitable amount so as to obtain a mixture having a pH of 5.5 to 9.5, thereby precipitating the coloured substances, and the formed precipitate is separated from the solution. The invention also relates to the use of a polyaluminium chloride for decolorization of solutions of sugars, sugar alcohols and betaine.
Claims10
A process for decolorization of solutions of sugars, sugar alcohols and betaine, comprising the steps of:
- (a) adding a polyaluminum chloride of the formula (I)
- Al.sub.2 (OH).sub.x Cl.sub.6-x+ !.sub.y
- wherein 1.ltoreq.x.ltoreq.5 and 1.ltoreq.y.ltoreq.10, or a mixture of such compounds or a corresponding compound or mixture of compounds further containing sulfate ions,
- to the solution of sugar, sugar alcohol or betaine having a dry substance content of 10-70% by weight and a temperature of 60-105.degree. C. in an amount to obtain a mixture having a pH of 5.5 to 11.5, thereby precipitating colored substances, and thereafter
- (b) separating the formed precipitate from the solution.
A process for removing colored substances present in sucrose solutions also optionally containing other sugars, sugar alcohols and betaine, said sugars comprising the steps of:
- (a) adding to said sucrose solution a polyaluminum chloride of the formula (I)
- Al.sub.2 (OH).sub.x Cl.sub.6-x+ !.sub.y
- wherein 1.ltoreq.x.ltoreq.5 and 1.ltoreq.y.ltoreq.10, or a mixture of such compounds or a corresponding compound or mixture of compounds further containing sulfate ions,
- said solution having a dry substance content of 10-70% by weight and a temperature of 60-105.degree. C., the polyaluminum chloride added in the amount to obtain a mixture having a pH of 6.0 to 9.0, thereby precipitating the colored substances, and thereafter
- (b) removing the formed precipitate from the treated solution.
Dependencies are inferred from the claim text.