| 摘要 |
1,224,783. Dehydrated potato pieces. UNCLE BEN'S Inc. 5 Nov., 1968 [9 Nov., 1967], No. 52272/68. Heading A2D. A quick-rehydratable dehydrated potato product is produced by cutting white potatoes into discrete pieces and, under substantially non-drying conditions, cooking so as to gelatinize the starch therewithin, cooling and freezing the pieces, and then maintaining the pieces in a frozen condition and removing moisture therefrom by sublimation such that the total concentration of moisture is not greater than 70% by weight, and finally drying the pieces so as to remove additional moisture therefrom. The cut potatoes are rinsed in a sulphite solution before cooking at a temperature of at least 150‹F. Cooling may be effected by quenching in cold water which may contain glycine, glucose, alkaline buffers and sulphites. Freezing may be effected by contacting the potato pieces with cold saturated air, by sealing in containers exposed to a cold atmosphere, or by immersion in a cold liquid such as a hydrocarbon or Freon (Trade Mark). Sublimation of moisture may be effected by means of a cold, e.g. 27-32‹F., dehumidified air stream. Final drying may be effected by conventional hot air drying to a moisture content of 15% by weight, the temperature of the pieces being maintained below 130‹F. until the moisture content has been reduced to 20% or less by weight. |
