Phosphorous (P₂O₅)
To extract phosphoric acid from such elements as monazite and xenotime you would use a process known as the wet-process phosphoric acid. To extract phosphorous the temperature needs to be substantially high in order for the phosphoric acid to polymerize. It becomes superphosphoric acid when the phosphoric acid begins to lose more and more water.

phosphoric acid formed:

3Ca₃(PO₄)₂ x CaF₂ + 10H₂SO₄ + 20H₂O -->

6H₃PO₄ + 10CASO₄ x 2H₂O + 2HF

extracting phosphorous reaction:

2Ca₃(PO₄)₂(s) + 6SiO₂(s) --> 6CaSiO₃(l) + 10CO(g) + P₄ (g)

To contain and store superphosphoric acid, a more “pure” and concentrated form of phosphorous, you need to keep it in a high temperature environment. Ammonia reacts with monocalcium phosphate to form the reaction formula:

Ca(H₂PO₄)₂ x H₂O + NH₃ --> CaHPO₄ + NH₄H₂PO₄ + H₂O

The curing process allows complete reaction of the sulfuric acid by penetration of the phosphate rock which maximizes the availability of the P O content. To extract phosphorous from orthophosphoric acid, H PO , we use either of the two processes: the electric furnace or acidulation of phosphate rock.

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