Phosphoric Acid → Phosphonato phosphate;titanium(4+)

HRID 1952973

Reaction equation

HRID 1952973 reaction equation
[O-2].[O-2].[Ti+4:3].P(=O)(O)(O)O.[O:9]=[P:10]12[O:21]P3([O:22][P:12]([O:14]P(O3)([O:17]1)=O)(=[O:13])[O:11]2)=O>>[O-:17][P:10]([O:11][P:12]([O-:22])([O-:14])=[O:13])(=[O:9])[O-:21].[Ti+4:3]

Participants

4

Reactant 3

HCID 1004Phosphoric AcidHCID 14812Phosphorus oxide (P4O10)2×HCID 162651Titanium oxide (Ti3O)3×

Product 1

HCID 20283883Phosphonato phosphate;titanium(4+)

Procedure

The method of the present invention generally involves the mixture of titanium dioxide and hot concentrated phosphoric acid in a reaction vessel. The reaction mixture has a phosphorus pentoxide to titanium dioxide mole ratio greater than one. Preferably, the phosphorus pentoxide to titanium dioxide mole ratio is about 1.06 or more, and most preferably about 1.20 to about 1.25. The reactants are thoroughly mixed and heated at temperatures of about 400° C. to about 500° C. to produce a fine titanium pyrophosphate powder having a significantly higher fines yield over conventional titanium pyrophosphate processes. The fines yield is greater than 90% when using a phosphorus pentoxide to titanium dioxide mole ratio of about 1.20 to about 1.25.

Workup

  1. additionThe reactants are thoroughly mixed
  2. temperatureheated at temperatures of about 400° C. to about 500° C.

Sources & evidence

ORD record
ord-188cf64d901f4c66b548fc7e97f0177b
Source dataset
uspto-grants-2000_09
Patent number
US06114427

Linked notes

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