Phosphoric Acid → Phosphorus oxide (P4O10)
Reaction equation
[OH:1][P:2]([OH:5])([OH:4])=[O:3].O[P:7]([OH:10])([OH:9])=[O:8].[Ca+2].[P:12](=[O:16])(O)([OH:14])O.[P:17]([O-])([O-])([O-])=[O:18].[P]>>[O:3]=[P:2]12[O:5][P:7]3([O:10][P:12]([O:14][P:17]([O:9]3)([O:4]1)=[O:18])(=[O:16])[O:1]2)=[O:8]Participants
5
Procedure
Concentrated superphosphate is manufactured by reacting thermal phosphoric acid with finely ground phosphate ore. The thermal phosphoric acid is made by burning elemental phosphorus to obtain P2O5 and combining P2O5 with water to make phosphoric acid. A porous monolithic mass is formed which is reduced to small sized particles for storage and completion of the chemical reactions. Electric furnace feedstock can be prepared by reducing the monolithic mass to a size suitable for smelting in electric furnaces. The P2O5 content of concentrated superphosphate fertilizer is in the range 48 to 50 percent.
Sources & evidence
- ORD record
- ord-91e8276a4d4e417c85fc6a31ab006f8c
- Source dataset
- uspto-grants-2001_01
- Patent number
- US06169222A
Reaction notes
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