Phosphoric Acid → Phosphorus oxide (P4O10)

HRID 894500Notes

Reaction equation

[O-:1][P:2]([O-:5])([O-:4])=[O:3].[O-][P:7]([O-:10])([O-:9])=[O:8].[O-][P:12]([O-:15])([O-])=[O:13].[F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[P:22](=[O:26])([OH:25])([OH:24])[OH:23].S(=O)(=O)(O)O>>[O:3]=[P:2]12[O:5][P:7]3([O:10][P:12]([O:15][P:22]([O:9]3)([O:4]1)=[O:23])(=[O:13])[O:1]2)=[O:8].[P:22](=[O:23])([OH:26])([OH:25])[OH:24]

Participants

Reactant 3

HCID 1004Phosphoric Acid2×

HCID 1118Sulfuric Acid

HCID 10207414Fluorapatite (Ca5F(PO4)3)

Product 2

HCID 1004Phosphoric Acid

HCID 14812Phosphorus oxide (P4O10)Yield 30%

Procedure

A 30% P2O5 wet process phosphoric acid was prepared from North Florida phosphate rock, dilute phosphoric acid and sulfuric acid. The metallic impurity content of the phosphoric acid analyzed as follows:

Sources & evidence

ORD record: ord-21dde83c96b648e6a6a2399b5bf05002
Source dataset: uspto-grants-1981_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04284614

Reaction notes

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