Hydrochloric Acid → Melamine Pyrophosphate

HRID 1581894Notes

Reaction equation

HRID 1581894 reaction equation
[N:1]1[C:8]([NH2:9])=[N:7][C:5]([NH2:6])=[N:4][C:2]=1[NH2:3].[O-:10][P:11]([O:14][P:15]([O-:18])([O-:17])=[O:16])(=[O:13])[O-:12].[Na+].[Na+].[Na+].[Na+].Cl>O>[OH:12][P:11]([O:14][P:15]([OH:18])([OH:17])=[O:16])(=[O:10])[OH:13].[N:1]1[C:8]([NH2:9])=[N:7][C:5]([NH2:6])=[N:4][C:2]=1[NH2:3]

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 7955MelamineHCID 24403Tetrasodium Pyrophosphate

Product 1

HCID 167296Melamine Pyrophosphate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
150 fahrenheit

Procedure

1200 grams of water was warmed to 130° F. To this, while being agitated, was added 100 grams of melamine (2,4,6-triamine-1,3,5-triazine) and a char and/or phase transfer catalyst as set forth in Table 2-B below. The mixture was then warmed to 150° F. and 104.5 grams of tetrasodium pyrophosphate was added. The mixture was heated to 170° F. and the slow addition of 200 grams of twenty degree Baumé muriatic acid was started. Warming was continued until to 200° F., at which time cooling is started. When cooled to 70° F., the mixture was filtered, dried and ground to recover the flame retardant.

Workup

  1. temperatureThe mixture was heated to 170° F.
  2. temperatureWarming
  3. customwas continued until to 200° F., at which time
  4. temperaturecooling
  5. temperatureWhen cooled to 70° F.
  6. filtrationthe mixture was filtered
  7. customdried
  8. customto recover the flame retardant

Sources & evidence

ORD record
ord-23ec384a45474463800a6e0bed49b275
Source dataset
uspto-grants-2004_05
Patent number
US06733697B2

Reaction notes

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