Process for preparing a crystalline α anhydrous dextrose of high purity
AssigneeRoquette Freres
InventorJean-Jacques Caboche
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Abstract
The invention relates to a process for preparing a crystalline α anhydrous dextrose from a starch hydrolysate, characterized in that a starch hydrolysate is prepared, said starch hydrolysate is nanofiltered over membranes in a manner such as to obtain a nanofiltration permeate constituting a syrup with a high glucose content and a nanofiltration retentate, said syrup enriched in glucose is concentrated to a dry matter content of at least 70 wt. % of glucose and at a temperature in the range 50° C. to 110° C., said concentrated syrup is crystallized by evaporation and agitation in such a manner as to obtain a crystalline mass containing at least 30 wt. % of crystals and the crystals of α anhydrous dextrose thus obtained are separated, recovered and dried.
Claims13
A process for preparing a crystalline α-anhydrous dextrose wherein:
- a) a starch hydrolysate is prepared;
- b) said starch hydrolysate is nanofiltered over membranes in such a way as to obtain a nanofiltration permeate constituting a syrup with a high glucose content and a nanofiltration retentate;
- c) said syrup with a high glucose content is concentrated to a dry matter content of at least 70 wt. % of glucose, at a temperature in the range 50° C. to 110° C.;
- d) said concentrated syrup is crystallised by evaporation and agitation in such a manner as to obtain a crystalline mass containing at least 30 wt. % of the crystals;
- e) the crystals of α anhydrous dextrose thus obtained are separated, recovered and dried.
Dependencies are inferred from the claim text.