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http://dx.doi.org/10.9713/kcer.2012.50.2.300

Phase Change of Calcium Carbonate by Adding Polymers  

Han, Hyun-Kak (Department of chemical Engineering, Soonchunhyang University)
Jeon, Je-Sung (Department of chemical Engineering, Soonchunhyang University)
Kim, Mi-Sun (Department of chemical Engineering, Soonchunhyang University)
Publication Information
Korean Chemical Engineering Research / v.50, no.2, 2012 , pp. 300-303 More about this Journal
Abstract
Phase change of calcium carbontae crystals in crystallization of precipitated calcium carbonate was researched by adding additives such as ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), citric acid (CIT) and pyromellitic amid (PMA). At low temperature $20^{\circ}C$, calcite crystal was made. At high temperature $80^{\circ}C$, aragonite crystal was made without additives. At middle temperature $40^{\circ}C$ and $60^{\circ}C$, Aragonite crystal also made by adding EDTA, DTPA. The crystal growth of Aragonite was retarded by the presence of CIT, PMA and the single phase of calcite was made. It was found that additives were important factors to make the single phase of calcium carbonate.
Keywords
Calcium Carbonate; Calcite; Aragonite; Additive;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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