| 摘要 |
PURPOSE:To remarkably improve the flowability of table salt by uniformly attaching magnesium carbonate and calcium carbonate to the surface of a sodium chloride crystal and suppressing the content of deliquescent component to an extremely low level. CONSTITUTION:The processed salt contains (a) >=0.003wt.% and <0.143wt.% of magnesium carbonate (in terms of magnesium) and (b) >=0.004wt.% and <1.000wt.% of calcium carbonate (in terms of calcium) in a state of fine particles uniformly attached to the surface of a sodium chloride crystal and contains (c) <0.003wt.% of magnesium chloride (in terms of magnesium) and (d) <0.004 wt.% of calcium chloride (in terms of calcium). The above processed salt can be produced by adding a solution of sodium carbonate or sodium bicarbonate to table salt in wet state in an amount of 0.8-5.0 equivalent (preferably 1.0-3.0 equivalent) based on the deliquescent component and drying the salt with heat. |
