oa South African Journal of Chemistry - Preparation of ultra-fine calcium carbonate by a solvent-free reaction using supersonic airflow and low temperatures : short communication



The treatment of calcium chloride with sodium carbonate under solvent-free conditions with a supersonic airflow and at a low heating temperature leads to the synthesis of ultra-fine calcium carbonate. The reaction not only involves mild conditions, a simple operation, and high yields but also gives a high conversion rate.


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