Production method of N-methylpyrrolidine

The invention discloses a production method of N-methylpyrrolidine. The production method comprises the following steps: taking N-methylpyrrolidone as a raw material and taking N-methyldiethanolamine as a solvent to carry out an isomerization hydrogenation cyclization reaction on the N-methylpyrrolidone, the N-methyl diethanolamine and hydrogen under the action of a catalyst, and further carrying out purification to obtain the target product N-methylpyrrolidine. The production method disclosed by the invention is mild in condition and is free of environmental pollution, and the treatment capacity of the catalyst is high, so that the conversion rate of N-methylpyrrolidone is greater than or equal to 99%. Almost all the N-methyldiethanolamine participates into the reaction, byproducts are few, and selectivity of N-methylpyrrolidine can reach 99.2%, so that the method is suitable for industrial production. 本发明公开了一种N-甲基吡咯烷的生产方法，包括以下步骤：以N-甲基吡咯烷酮为原料，以N-甲基二乙醇胺为溶剂，在催化剂的作用下，N-甲基吡咯烷酮、N-甲基二乙醇胺和氢气发生异构加氢环化反应，进一步提纯，得到目标产物N