Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Citric Acid | HCID 311 | — |
| Reactant | Phosphoric Acid | HCID 1004 | — |
| Reactant | Sodium Phosphate, Dibasic | HCID 24203 | — |
| Reactant | Tetracalcium phosphate | HCID 18676510 | — |
| Product | Citric Acid | HCID 311 | — |
| Product | Sodium Phosphate, Dibasic | HCID 24203 | — |
| Product | Calcium hydrogen phosphate | HCID 24441 | — |
Reaction Steps
When the pH value of the solution is near 8.5 after equilibrium is reached, the reached shown in the formula 2 proceeds until all of the calcium hydrogen phosphate convert into hydroxyapatite while the pH is maintained at near 8.5. The H3PO4 formed by the reaction comes to solution-equilibrium with the disodium hydrogen phosphate and citric acid during kneading. If the pH is still maintained at near 8.5, the reaction of the formula 4 also proceeds and the tetracalcium phosphate converts into hydroxyapatite. The Ca(OH)2 by product of this reaction comes to solution-equilibrium with H3PO4 produced from calcium hydrogen phosphate and disodium hydrogen phosphate and citric acid in kneading solutions, and the reaction shown as the formulae 7 and 8 proceeds:
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| Patent number | US05342441 |
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| Source dataset | uspto-grants-1994_08 |
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| ORD ID | ord-0d73cac4cf03429e9d3e1689658c9b02 |
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| Source note | uspto-grants-1994_08 |
|---|
