Process for preparing melamine from urea

Details Process for preparing melamine from urea Process for preparing melamine from urea

C - Chemistry, Metallurgy

07

D

C07D 251/60 (2006.01) C07B 63/00 (2006.01)

Patent

CA 2398989

Process for preparing melamine from urea at elevated temperature and in the presence of a catalyst, in which a gaseous product stream is obtained which is contacted with a liquid coolant in a cooling zone and that the temperature in the scrubbing section is lowered by applying an extra cooling step.

L'invention concerne un procédé permettant la préparation à chaud de mélamine à partir d'urée, en présence d'un catalyseur. Ce procédé consiste à produire un flux de produit gazeux qu'on fait entrer en contact avec un liquide de refroidissement dans une zone de refroidissement. La température dans la section de lavage est abaissée au moyen d'une opération de refroidissement additionnelle.

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