Water → Magnesium Phosphate

HRID 268123

Reaction equation

HRID 268123 reaction equation
C(=O)([O-])[O-].[Mg+2:5].O.[OH:7][P:8]([OH:11])([OH:10])=[O:9].[Cr]([O-])([O-])(=O)=O.[Pb+2]>C(O)C>[P:8]([O-:11])([O-:10])([O-:9])=[O:7].[Mg+2:5].[P:8]([O-:11])([O-:10])([O-:9])=[O:7].[Mg+2:5].[Mg+2:5]

Participants

6

Reactant 4

HCID 962WaterHCID 1004Phosphoric AcidHCID 11029Magnesium CarbonateHCID 24460Lead Chromate

Product 1

HCID 24439Magnesium Phosphate

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A saturated solution of magnesium phosphate is prepared by mixing 75 gm of magnesium carbonate in 350 ml boiling water. 100 ml of 85% H3PO4 is then added. To one-half of the solution is added 48% HF to form the fluorophosphate complex. The two solutions are each slurried with lead chromate pigment after which ethanol is slowly added to each to cause formation of the sol which deposits on the particles. The encapsulated pigments are filtered and dried at 170°C for 2 hours without darkening and when incorporated into general purpose polystyrene both were thermally stable at 625°F.

Workup

  1. additionTo one-half of the solution is added 48% HF
  2. customto form the fluorophosphate complex
  3. additionis slowly added to
  4. filtrationThe encapsulated pigments are filtered
  5. customdried at 170°C for 2 hours without darkening and when
  6. customboth were thermally stable at 625°F.

Sources & evidence

ORD record
ord-4b70b2f7eb194ec0af58e2bf5a64bb81
Source dataset
uspto-grants-1976_03
Patent number
US03946134

Linked notes

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