Formaldehyde → Melamine, methyl-

HRID 1591236

Reaktionsgleichung

Reaktionsgleichung von HRID 1591236
[N:1]1[C:8]([NH2:9])=[N:7][C:5]([NH2:6])=[N:4][C:2]=1[NH2:3].C=O.[OH-].[Na+].[C:14](O)(=O)C(O)=O>CO>[CH3:14][NH:3][C:2]1[N:4]=[C:5]([NH2:6])[N:7]=[C:8]([NH2:9])[N:1]=1

Komponenten

6

Edukt 4

HCID 712FormaldehydeHCID 971Oxalic AcidHCID 7955MelamineHCID 14798Sodium Hydroxide

Produkt 1

HCID 26029Melamine, methyl-

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Reaktionsbedingungen

Temperatur
70 °C

Versuchsvorschrift

C-2: A mixture of 378 parts by weight of melamine and 810 parts by weight of 37% formalin was adjusted to pH 7-8 with sodium hydroxide. The mixture was heated to about 70° C. and when it became transparent, 1800 parts by weight of methyl alcohol and 1.9 parts by weight of oxalic acid were added thereto. Then, the mixture was boiled for several minutes. The reaction mixture was cooled, then filtrated and concentrated under reduced pressure to obtain polymethoxy methyl melamine (C-2). An analysis showed that the number of methanol bonded was about 3 mols per 1 mol of melamine.

Aufarbeitung

  1. waitThen, the mixture was boiled for several minutes
  2. temperatureThe reaction mixture was cooled
  3. filtrationfiltrated
  4. concentrationconcentrated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-9db5dafdc7ac4318982709417935f304
Quelldatensatz
uspto-grants-1993_04
Patentnummer
US05206290

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