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US 6,086,681 AGranted
Method for recovery of xylose from solutions
AssigneeXyrofin Oy
InventorsMirja Lindroos, Heikki Heikkila, Juha Nurmi, Olli-Pekka Eroma
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Abstract
The invention relates to a method for the recovery of xylose from xylose-containing aqueous solutions containing 30-60% by weight of xylose on dissolved solids, in which method the solution is treated to produce a solution supersaturated with xylose, xylose is crystallized from the supersaturated solution and the xylose crystals are recovered.
Claims29
A method for crystallizing and recovering xylose from an aqueous solution of xylose consisting essentially of:
- (a) concentrating a xylose-containing solution having a xylose purity of 30-60%, based on xylose in the dry solids contained in said solution, under conditions effective to produce a solution of xylose that is supersaturated with xylose;
- (b) crystallizing the supersaturated xylose solution;
- and
- (c) recovering xylose crystals therefrom.
1 more element
A method for crystallizing and recovering xylose from an aqueous solution of xylose consisting essentially of:
- (a) concentrating a xylose-containing solution having a xylose purity of 30-60%, based on xylose in the dry solids contained in said solution, to produce a solution of xylose that has a supersaturation value within the range of 1.1 to 3.0;
- (b) crystallizing the solution provided in step (a) at a temperature within the range of 20-80.degree. C. for a crystallization inducing time of less than 100 hours;
- and
- (c) recovering xylose crystals therefrom.
1 more element
Dependencies are inferred from the claim text.