Sodium Carbonate → Tricalcium Phosphate

HRID 986879

Reaction equation

HRID 986879 reaction equation
S([O-])([O-])(=O)=O.[Al+3].S([O-])([O-])(=O)=O.S([O-])([O-])(=O)=O.[Al+3].C(=O)([O-])[O-].[Na+].[Na+].[O-:24][P:25]([O:28]P([O-])([O-])=O)(=[O:27])[O-:26].[Ca+2:33].[Ca+2]>>[P:25]([O-:28])([O-:27])([O-:26])=[O:24].[Ca+2:33].[P:25]([O-:28])([O-:27])([O-:26])=[O:24].[Ca+2:33].[Ca+2:33]

Participants

4

Reactant 3

HCID 10340Sodium CarbonateHCID 24632Calcium pyrophosphate (Ca2P2O7)HCID 24850Aluminum Sulfate

Product 1

HCID 24456Tricalcium Phosphate

Procedure

In this method, the first reactant, 800 g of a 12% aqueous solution of aluminum sulfate was added to the reactor vessel, then the second reactant, an 18% aqueous solution of sodium carbonate, was metered into the vessel at a rate of 7 ml/minute until the pH reached 5.9. The reactants were mixed together for 20 minutes under agitation. Next, 54 grams of calcium pyrophosphate was added and the resulting slurry was mixed for 15 minutes with agitation and filtered and washed to a conductivity of about 2000 μmhos. The recovered wetcake was reslurried with 150 g of water and 200 g of a 1% FD&C Blue No. 1 aqueous solution to form a slurry of colored calcium phosphate colorant and this slurry was then mixed for approximately 1 hour.

Workup

  1. additionThe reactants were mixed together for 20 minutes under agitation
  2. additionthe resulting slurry was mixed for 15 minutes with agitation
  3. filtrationfiltered
  4. washwashed to a conductivity of about 2000 μmhos

Sources & evidence

ORD record
ord-a225f7a185e74e02bae100a1e0f1e151
Source dataset
uspto-grants-2003_10
Patent number
US06630019B2

Linked notes

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