Method for crystallizing polyols and sugars
AssigneeVomm Chemipharma S.r.l.
InventorCorrado Vezzani
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Abstract
A method for the continuous crystallization of sugars or polyols, comprising the steps of: arranging in a thin, turbulent and dynamic layer a continuous flow of melted mass of a compound selected among the group comprising sugars and polyols, with at least 98% of dry material, and a mass of said compound in crystalline form as a crystallization seed; advancing said thin layer of material along a cooling wall at a temperature between −15° C. and +5° C.; granulating the material while said thin layer is advanced along the cooling wall, thus obtaining granules of the crystallized compound, and cooling said granules to room temperature, after a predetermined maturation time.
Claims7
A method for the continuous crystallization of sorbitol, comprising the subsequent steps of:
- arranging in a thin, turbulent and dynamic layer a continuous flow of material, comprising a melted mass of sorbitol with at least 99% of dry material and a corresponding mass of crystallized sorbitol as a crystallization seed;
- advancing said thin layer of material along and in substantial contact with a cooling wall, maintained at a temperature comprised between −15° C. and +5° C.;
- granulating said material while said thin layer is advanced along the cooling wall, thus obtaining a continuous flow of granules of crystallized sorbitol, and
- cooling said sorbitol granules to room temperature, after a predetermined maturation time.
A method for the continuous crystallization of sorbitol, comprising the subsequent steps of:
- feeding a first flow comprising melted sorbitol, with at least 99% of dry material and a second flow of crystallization seed consisting of crystallized sorbitol, in a turbocrystallizer having the inner wall thermostated at a temperature comprised between −15° C. and 5° C., and having a bladed shaft rotating at a speed of 400-1200 r.p.m.;
- intimately mixing said flows, by simultaneously centrifuging them against said thermostated wall, with the formation of a turbulent, tubular, thin layer;
- advancing said thin layer along said thermostated wall with simultaneous and continuous granulation of the mixture of said flows forming said layer;
- discharging a continuous flow of crystallized granular sorbitol from said turbocrystallizer, and
- cooling to room temperature said granular sorbitol after a predetermined maturation time.
Dependencies are inferred from the claim text.