Phosphoric Acid → Phosphorus oxide (P4O10)

HRID 370606Notes

Reaction equation

HRID 370606 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)(O)(O)[OH:23]>>[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]

Participants

3

Reactant 2

HCID 1004Phosphoric AcidHCID 10207414Fluorapatite (Ca5F(PO4)3)

Product 1

HCID 14812Phosphorus oxide (P4O10)

Procedure

continuously introducing into a pre-reactor (i) phosphate rock containing 66-75% tricalcium phosphate comminuted to a size such that 90% passes a 100-mesh screen and 70-80% passes a 200-mesh screen, (ii) phosphoric acid containing 38-54% P2O5 in an amount sufficient to provide a ratio of P2O5 to CaO in the reaction mixture of 0.7 to 1.0, and (iii) water in an amount sufficient to dilute the phosphoric acid to 38-44% P2O5,

Workup

  1. customcomminuted to a size such that 90%

Sources & evidence

ORD record
ord-a13e606979ae4c92987481b8858ec02d
Source dataset
uspto-grants-1985_07
Patent number
US04528021

Reaction notes

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