The invention concerns a method for preparing methyl ethyl ketone azine which consists in: (a) reacting ammonia, hydrogen peroxide and methyl ethyl ketone in the presence of a working solution to form an azine; (b) separating the working solution and the azine possibly containing methyl ethyl ketone which has not reacted and butanol-2; (c) recycling the working solution to step (a) after optional treatment; (d) separating the methyl ethyl ketone and the butanol-2 from the azine. The butanol-2 of the flow in step (d) is either purged or dehydrogenated in MEK and recycled at step (a).

A invenção concerne um método para preparar o azine ethyl methyl da cetona qual consiste: (a) reagindo a amônia, o peroxide de hidrogênio e a cetona ethyl methyl na presença de uma solução trabalhando para dar forma a um azine; (b) separando a solução trabalhando e o azine que contêm possivelmente a cetona ethyl methyl que não reagiu e butanol-2; (c) recycling a solução trabalhando à etapa (a) após o tratamento opcional; (d) separando a cetona ethyl methyl e o butanol-2 do azine. O butanol-2 do fluxo na etapa (d) é removido ou dehydrogenated no MEK e recycled na etapa (a).