Citric Acid → Magnesium Phosphate

HRID 886672

Reaction equation

HRID 886672 reaction equation
O.O.O.O.O.O.O.O.O.O.[P:11]([O-:15])([O-:14])([O-:13])=[O:12].[Na+].[Na+].[Na+].C(O)(=O)CC(CC(O)=O)(C(O)=O)O.[Cl-].[Mg+2:33].[Cl-]>O>[P:11]([O-:15])([O-:14])([O-:13])=[O:12].[Mg+2:33].[P:11]([O-:15])([O-:14])([O-:13])=[O:12].[Mg+2:33].[Mg+2:33]

Participants

5

Reactant 3

HCID 311Citric AcidHCID 61509Phosphoric acid, trisodium salt, decahydrateHCID 5360315Magnesium Chloride2×

Product 1

HCID 24439Magnesium Phosphate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
98 °C

Procedure

1280 g of de-ionized water was introduced into a 1 gallon vessel fitted with a Kady Lab Mill and stirred at a motor speed of 15 Hz. 40 g of trisodium phosphate decahydrate and 2 g of citric acid were then added to the vessel. The temperature of the vessel was increased to 98° C. and 300 g of 3.5% aqueous solution of magnesium chloride was titrated into the vessel. 10 minutes after completion of the magnesium chloride addition, a sample was taken from the vessel and the pH of the sample was measured to be 7.7. The motor speed of the Kady Mill was then increased to 45 Hz, and 450 g of Coarse Polymer Powder was introduced into the vessel. 30 minutes after introduction of the Coarse Polymer Powder, the vessel was rapidly cooled to 70° C. and the motor speed of the Kady Mill was then reduced to 15 Hz while cooling continued until the temperature reached 25° C.

Workup

  1. customfitted with a Kady Lab Mill
  2. additionwas introduced into the vessel
  3. temperaturewhile cooling
  4. customreached 25° C.

Sources & evidence

ORD record
ord-3f5007e7e9e0423cb7353fe8c514ab7b
Source dataset
uspto-grants-2012_08
Patent number
US08247155B2

Linked notes

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