Water → Tricalcium Phosphate

HRID 2354475Notes

Reaction equation

HRID 2354475 reaction equation
O.[OH-].[Ca+2:3].[OH-].[P:5](=[O:9])([OH:8])([OH:7])[OH:6]>C(O)(=O)C>[P:5]([O-:9])([O-:8])([O-:7])=[O:6].[Ca+2:3].[Ca+2:3].[Ca+2:3].[P:5]([O-:9])([O-:8])([O-:7])=[O:6]

Participants

5

Reactant 3

HCID 962Water2×HCID 1004Phosphoric AcidHCID 6093208Calcium Hydroxide

Product 1

HCID 24456Tricalcium Phosphate

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

A new and useful method for producing commercial tri-calcium phosphate, or TCP, utilizes less water and energy than current methods. TCP has the following chemical formula: Ca3(PO4)2. The processes &the present invention produce a TCP product with less energy and less waste than the current methods. According to the method of the present invention in FIG. 1, water 1, hydrated lime 2, related ingredients such as acetic acid 4, and phosphoric acid 3 are admixed in a reaction vessel 7 to form a tri-calcium phosphate slurry 6. The resultant slurry 6 has approximately 72% water and 28% by weight of solid TCP. The slurry 6 then physically contacts air to remove the moisture from the slurry 6. To remove the moisture, the air temperature must reach the evaporation point of the moisture in the slurry 6. The heat of the chemical reaction is controlled to produce TCP having certain characteristics, such as fine particle or powdery form.

Workup

  1. customproduce a TCP product with less energy and less waste than the current methods
  2. customare admixed in a reaction vessel

Sources & evidence

ORD record
ord-2f889752971a493784bf763d95f42844
Source dataset
uspto-grants-2010_07
Patent number
US07754174B2

Reaction notes

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