Process for preparing azine using reactors in cascade

Abstract

The invention relates to a process for continuously preparing azine, comprising a step of reacting ammonia, hydrogen peroxide and a ketone of formula R1R2CO, the groups R1 and R2 denoting, independently of one another, a methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl and octyl group, in the presence of an aqueous solution comprising at least one activator to form an azine, the reaction being performed in at least 2 reactors arranged in cascade, the agitation of the first reactor being less than the agitation of the following reactor or each of the following reactors, the reactants being injected at the first reactor, the aqueous solution comprising at least one activator and comprising dissolved ammonia in a proportion of between 50% and 100% relative to the saturation of ammonia in pure water at the temperature of the aqueous solution.

Dependencies are inferred from the claim text.