| 摘要 |
PURPOSE: A dehumidifying composition that is prepared by compounding waste lime, waste shell fish, calcium oxides, calcium hydroxides, and sodium hydroxides is environmentally acceptable so that it could be an excellent substitute for conventional calcium chloride. CONSTITUTION: The preparation method of dehumidifying composition includes: (i) mixing water with an admixture comprising at least two material selected from waste lime, waste shell fish, calcium oxides, calcium hydroxides, and sodium hydroxides followed by heating; (ii) adding CH3COOH into the resultant of 1st step to obtain acetate; (iii) adding 0.01-2wt.% of sodium alginate to 100wt.% of acetate prepared in the 2nd step and agitate for obtaining an undiluted solution of the present dehumidifying composition wherein based on the 100wt.% of acetate, 0.1-0.2wt.% of starch, 1-5wt.% of sodium silicate and 0.01-0.5wt.% of pigment are further added; (iv) adding 50-150wt.% of sand or low cost inorganic oxides to 100wt.% of the undiluted solution of the present dehumidifying composition and agitate to obtain a solid dehumidifying composition.
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