| 摘要 |
PROBLEM TO BE SOLVED: To prevent a salt from being solidified while maintaining fluidity of the salt without causing any cloudiness when the salt is dissolved in water by coating the surfaces of salt crystals with trehalose. SOLUTION: Trehalose represented by the formula is dissolved into water to obtain a trehalose aqueous solution, the trehalose aqueous solution is added to the salt consisting essentially of sodium chloride such as common salt with a sprayer or the like, and they are mixed. The resulting mixture is dried with a hot-air dryer to coat the surfaces of salt crystals with trehalose. In the method, trehalose is used in an amount sufficient to provide a >=0.5 wt.% ratio of trehalose to the salt and a highly concentrated trehalose aqueous solution is desired when added to the salt, and also, since trehalose hardly causes moisture adsorption or release in an environmental condition of a <=95% relative humidity, by coating the surfaces of salt crystals with trehalose, moisture adsorption or release on or from the surfaces of salt crystals can be inhibited and the salt is prevented from being solidified. Accordingly trehalose is effectively used for salt which has a high sodium chloride content and a low water content and is liable to be solidified. Further, trehalose is an edible glucide and can appropriately be applied to salt for food such as table salt.
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