Phosphoric Acid → Phosphonato phosphate;titanium(4+)

HRID 3056

Reaction equation

HRID 3056 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-9102e88c394640fc8efd773b9c3e0835
Source dataset
uspto-grants-1998_03
Patent number
US05733519

Linked notes

Loading…