The reaction can be carried out in a batch or continuous process. In a batch process, calcium carbonate and phosphoric acid are mixed in a reactor and heated to a temperature of about 100°C. The reaction is exothermic, so the heat generated by the reaction is used to drive off water vapor. The mixture is stirred until all of the calcium carbonate has reacted.
In a continuous process, calcium carbonate and phosphoric acid are fed into a reactor at a controlled rate. The reaction mixture is heated to a temperature of about 100°C, and the water vapor is driven off. The product is a dry powder that is collected in a cyclone separator.
DCP is used as a food additive, a fertilizer, and a pharmaceutical ingredient. In food, DCP is used as a source of calcium and phosphorus. It is also used as a anticaking agent and a stabilizer. In fertilizers, DCP is used as a source of phosphorus. In pharmaceuticals, DCP is used as a antacid and a laxative.
