Phosphoric Acid → Phosphoric Acid
Reaction equation
[P:1](=[O:5])([OH:4])([OH:3])[OH:2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[F-].[Ca+2:22].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[S:27](=[O:31])(=[O:30])([OH:29])[OH:28]>>[P:1](=[O:2])([OH:5])([OH:4])[OH:3].[S:27]([O-:31])([O-:30])(=[O:29])=[O:28].[Ca+2:22]Participants
5
Procedure
The manufacture of phosphoric acid is conventionally performed on a commercial scale by either the wet process or the thermal process. In the wet process, phosphate rock is treated with sulfuric acid to produce weak aqueous phosphoric acid (20 - 30% P2O5) and calcium sulfate. The phosphoric acid and calcium sulfate are separated by filtration and the phosphoric acid is concentrated to the desired level (usually 40 to 72% P2O5). The resulting acid is quite impure and usually black in color. It is suitable primarily for fertilizer manufacture and not for other industrial purposes.
Sources & evidence
- ORD record
- ord-e0c6f497d3ef4cf8b95fe8c483504f4f
- Source dataset
- uspto-grants-1979_02
- Patent number
- US04141958
Reaction notes
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