METHOD OF PURIFYING SEWAGE WATERS OF MELAMINE PRODUCTION Russian patent published in 2014 - IPC C02F1/02 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of purifying sewage waters, formed in production of melamine from urea by technologies, including application of water solutions of hydroxides of alkali metals for purification and separation of melamine. Invention can be applied in industrial production of melamine. Method of purifying sewage waters of melamine production includes thermal hydrolysis of sewage water at temperature 190-245°C, with bubbling water steam preferably in quantity 5-20% of quantity of impure sewage, which has temperature, exceeding work temperature of hydrolysis by 5-60°C, through sewage water.

EFFECT: increase of degree of sewage water purification and simplification of technology.

4 cl, 2 dwg