Title: New Technology for Preparing of Spherical Calcium Carbonate from Calcium Carbide Residue
Abstract: In this paper,calcium hydroxide in the calcium carbide residue was high-efficiently turned to soluble calcium glycine solution with glycine solution,then spherical calcium carbonate,which whiteness and purity were both higher than 96%,was prepared successfully by the carbonization reaction without any template additive.The results of XRD showed most of calcium carbonate was vaterite phase and a little of calcium carbonate was calcite.Besides,the structure characteristics of calcium carbonate and mechnism were studied by the techniques of SEM and FTIR,the results showed that soft spherical calcium carbonate,which diameter ranged from 1 μm to 3 μm,was got when the Ca2+ concentration was 0.13 mol/L.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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