Patent ID: 6562311
Filing Date: 2003-05-13
Classification: C01B,C07C

Abstract:
A process for the preparation of methyl ethyl ketone azine, comprising the following stages of:a) reacting ammonia, hydrogen peroxide, and methyl ethyl ketone in a working solution to form azine; b) separating the azine, byproduct 2-butanol, and unreacted methyl ethyl ketone from the working solution; c) recycling the working solution to stage (a); d) separating the azine from the 2-butanol, and unreacted methyl ethyl ketone; e) dehydrogenating at least a part of the 2-butanol obtained in stage (d) to form methyl ethyl ketone; and f) recycling the methyl ethyl ketone obtained in stage (e), unreacted 2-butanol in stage (e), and methyl ethyl ketone obtained in stage (d) mixture to stage (a), wherein the 2-butanol/methyl ethyl ketone ratio is between 0.05 and 0.15.