FIELD: chemistry.
SUBSTANCE: described is method of obtaining highly pure melamine due to fast cooling of melamine melt, purified from waste gases of melamine synthesis and containing amelline, ammelide and polycondensates as admixtures, with application of ammonia-containing aqueous solution in conditions, ensuring conversion of larger part of polycondensates into melamine, with obtaining melamine solution, separation of melamine from obtained solution by crystallisation with further processing of mother liquor of crystallisation in conditions, ensuring conversion of at least part of amelline it contains into ammelide and melamine, and non-catalytic high-pressure installation for obtaining melamine with high degree of purity by claimed method.
EFFECT: obtaining melamine with high degree of purity.
21 cl, 4 ex, 5 dwg
