Alternative allulose crystal process

A method for producing allulose crystals, wherein the method comprises:

• a) evaporating a feed allulose syrup at a sub-ambient pressure and a first temperature to produce a first supersaturated allulose syrup having an allulose syrup target saturation;
• b) introducing seed crystals to the first supersaturated allulose syrup and allowing the allulose to crystallize at a crystallization rate to produce a first massecuite comprising allulose crystals and a first supersaturated mother liquor having a first target mother liquor saturation higher than the allulose syrup target saturation;
• c) evaporating the first massecuite at the sub-ambient pressure and a second temperature, lower than the first temperature to produce a second massecuite comprising allulose crystals and a second supersaturated mother liquor having a second mother liquor target saturation lower than the first mother liquor target saturation;
• d) increasing the pressure to ambient and cooling the second massecuite to a third temperature lower than the second temperature at a cooling rate to produce a third massecuite comprising allulose crystals and a third supersaturated mother liquor having a third target mother liquor saturation;
• e) allowing the third massecuite to crystallize for a crystallization time to produce a product massecuite comprising product allulose crystals at a target yield and a product mother liquor, the product mother liquor having a target product mother liquor supersaturation;
• and
• f) separating the product allulose crystals from the product supersaturated mother liquor to provide allulose crystals at the target yield.