Formation of Phosphoric Acid from Phosphate Rocks

FORMATION OF PHOSPHORIC ACID FROM PHOSPHATE ROCKS 

The major deposits of phosphate ores are in Florida in the United States, Kola in Russia, and Morocco [2,3]. They consist of minerals of calcium and aluminum phosphates [2]. These ores are processed to extract these minerals the most important among these minerals is calcium fluorophosphate (CaioF2(P04)6). Richness of phosphate in these rocks and the extracted products is measured in terms of P2O5 content in them. 

Ortho phosphoric acid (H3PO4), which is referred to as phosphoric acid here after, is the first and the most important product extracted from the phosphate ore. When the ore is reacted with sulfuric acid (H2SO4), phosphoric acid is formed by the following reaction 

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