| 摘要 |
1. 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, containing means of activation of hydrogen peroxide to form azine; b) separating of working solution and azine optionally comprising unreacted methyl ethyl ketone and 2-butanol; c) recycling the working solution to stage (a), after optional treatment; d) separating the azine from the 2-butanol, and unreacted methyl ethyl ketone; e) a whole or a part of the flow of stage (d) comprising methyl ethyl ketone and 2-butanol is treated for dehydration, depending on activation means, used on stage (a), of whole or a part of 2-butanole to form methyl ethyl ketone and completely (treated or untreated) flow is recycling to stage (a). 2. 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, containing means of activation of hydrogen peroxide different of cacodylic acid, to form azine. b) separating of working solution and azine optionally comprising unreacted methyl ethyl ketone and 2-butanol; c) recycling the working solution to stage (a), after optional treatment; d) separating of methyl ethyl and the 2-butanol ketone from the azine; e) bleeding off at least a part of the 2-butanol obtained in stage (d); and f) recycling a part of 2-butanol from flow of stage (d), in way to keep the 2-butanol/methyl ethyl ketone molarity ratio between 0.05 and 0.15 at the entry to stage (a). 3. The process of claim 1 or 2, wherein the activator is chosen from a group consisting of amides, ammonium salts and nitrites. 4. The process of claim 2, wherein the working solution is an aqueous solution of an amide of a weak acid and of a corresponding ammonium salt. 5. A process of claims 1-4, where azine collected in stage (d) is subjected to hydrolyze to obtain hydrazine hydrate; and h) recycling the recovered methyl ethyl ketone to stage (a).
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