FIELD: chemistry.
SUBSTANCE: invention relates to a method of purifying melamine from condensation products, which involves treating aqueous solution of crude melamine at temperature of 110-170°C for 5-60 minutes in the presence of an alkali metal carbonate. The alkali metal carbonate used is sodium carbonate, potassium carbonate or a mixture thereof. The source of alkali metal carbonate can also be treated waste water from melamine production, which contains an alkali metal carbonate.
EFFECT: low degree of decomposition of melamine with high degree of decomposition of condensation products.
3 cl, 5 ex
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