Pyrophosphoric acid → Melamine Pyrophosphate

HRID 1387650Notes

Reaction equation

HRID 1387650 reaction equation
[O-:1][P:2]([O:5][P:6]([O-:9])([O-:8])=[O:7])(=[O:4])[O-:3].[Na+].[Na+].[Na+].[Na+].[N:14]1[C:21]([NH2:22])=[N:20][C:18]([NH2:19])=[N:17][C:15]=1[NH2:16].P(OP(O)(O)=O)(O)(O)=O>O>[OH:3][P:2]([O:5][P:6]([OH:9])([OH:8])=[O:7])(=[O:1])[OH:4].[N:14]1[C:21]([NH2:22])=[N:20][C:18]([NH2:19])=[N:17][C:15]=1[NH2:16]

Participants

5

Reactant 3

HCID 1023Pyrophosphoric acidHCID 7955Melamine2×HCID 24403Tetrasodium Pyrophosphate2×

Product 1

HCID 167296Melamine Pyrophosphate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

Tetrasodium pyrophosphate (110 g) was dissolved in 4.1 l of deionized water at ambient temperature. Melamine (104 g) was separately slurried in 4.1 l of deionized water at ambient temperature. The clear tetrasodium pyrophosphate solution was passed at a rate of 150 ml/min. through a 5 cm inner diameter ion exchange column containing 1.5l of AMBERLITE 120H ion exchange resin. The pyrophosphoric acid solution flowing from the exchange column was passed directly into the melamine slurry container. After agitating for 15 minutes, the product melamine pyrophosphate IX was then recovered by filtration and washed with deionized water (2 l). The product melamine pyrophosphate IX was dried in an oven at 100°C to constant weight. Yields from several preparations were 94% +/− 1%.

Workup

  1. additioncontaining 1.5l of AMBERLITE 120H ion exchange resin
  2. filtrationthe product melamine pyrophosphate IX was then recovered by filtration
  3. washwashed with deionized water (2 l)
  4. dry with materialThe product melamine pyrophosphate IX was dried in an oven at 100°C to constant weight
  5. customYields from several preparations

Sources & evidence

ORD record
ord-fbf0cbd5050c45b79acca2017215bc5d
Source dataset
uspto-grants-2001_07
Patent number
US06268494B1

Reaction notes

Loading…