1997 Volume 23 Issue 5 Pages 707-712
Precipitation of calcite is studied by reaction between aqueous solutions of calcium chloride and sodium carbonate in a batch crystallizer. The calcium carbonate intermediate generated by reaction between these solutions was rapidly transformed to calcite by addition of sodium chloride crystals under some operational conditions, which are determined in this study, and then calcite gradually grew in the intermediate slurry. The crystal growth rate of calcite is obtained as 1.2 μm/min when enough amount of calcium carbonate intermediate coexists. The crystal growth rate of calcite is kept constant by the fact that the concentration of calcium ion in the reacting solution is saturated by dissolution of the calcium carbonate intermediate.
