Phosphoric Acid → Tricalcium Phosphate

HRID 1357978Notes

Reaction equation

HRID 1357978 reaction equation
[OH-].[Ca+2:2].[OH-].[P:4](=[O:8])([OH:7])([OH:6])[OH:5]>O>[P:4]([O-:8])([O-:7])([O-:6])=[O:5].[Ca+2:2].[P:4]([O-:8])([O-:7])([O-:6])=[O:5].[Ca+2:2].[Ca+2:2]

Participants

4

Reactant 2

HCID 1004Phosphoric AcidHCID 6093208Calcium Hydroxide

Product 1

HCID 24456Tricalcium Phosphate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent4×

Procedure

A round bottom separable flask equipped with a stirrer and a thermometer was charged with 4.61 g of calcium hydroxide and 145.39 g of distilled water, and they were vigorously stirred to prepare a suspension. The suspension was controlled to a temperature of 40° C., and an aqueous solution prepared by mixing and dissolving 33.01 g of a 11.1% phosphoric acid aqueous solution, 56.21 g of the water-soluble polymer (Polymer A) aqueous solution adjusted to a pH of 10.0 obtained in Polymer Production Example 1 and 10.78 g of distilled water was continuously added thereto in 2 hours by means of a microtube pump while stirring at a stirring rate of 200 rpm (reaction method I). After addition, the reaction was further carried out at 40° C. for one hour to obtain a (meth)acrylamide base polymer/calcium phosphate fine particle (50:50)-dispersed aqueous solution (a-1) which does not cause separation even after standing for one day and which is excellent in stability.

Workup

  1. customA round bottom separable flask equipped with a stirrer
  2. customto prepare a suspension
  3. customwas controlled to a temperature of 40° C.
  4. customan aqueous solution prepared
  5. additionby mixing
  6. additionwas continuously added
  7. stirringin 2 hours by means of a microtube pump while stirring at a stirring rate of 200 rpm (reaction method I)
  8. additionAfter addition

Sources & evidence

ORD record
ord-5b3044c4b48f4b9daacafd49a0ce6533
Source dataset
uspto-grants-2003_07
Patent number
US06593408B1

Reaction notes

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