Method for crystallizing anhydrous fructose from its aqueous...

Details Method for crystallizing anhydrous fructose from its aqueous... Method for crystallizing anhydrous fructose from its aqueous...

C - Chemistry, Metallurgy

13

K

161/37, 260/234.

C13K 11/00 (2006.01) B01D 9/02 (2006.01) C07H 3/02 (2006.01)

Patent

CA 2034475

Crystallizing anhydrous fructose by preparing an aqueous solution containing at least about 90% dry substance, the fructose content of the dry substance being at least about 90% by weight; seeding the aqueous solution at a temperature of 50-60°C; and cooling the resulting mass at a controlled rate and with continuous mixing such that the supersaturation of the liquid solution with respect to saturated fructose is less than a ratio of about 1.25 and the temperature difference between the warmest and coolest portions of said solution is no more than about 6°C. Cooling is accomplished in a crystallizer with a heat transfer surface of 5 mm2/mm3 or greater. This method enables large scale, high capacity, high yield production of crystalline fructose through the use of a crystallizer with optional heat and mass transfer properties.

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