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发明公开
CN102070501A 由1,4-丁二醇制备N-甲基吡咯烷酮的方法 无效 - 驳回 转让

由1,4-丁二醇制备N-甲基吡咯烷酮的方法
摘要：
本发明提供一种制备γ-丁内酯(GBL)和N-甲基吡咯烷酮(NMP)的方法，更具体而言，涉及制备N-甲基吡咯烷酮的方法，其中将1，4-丁二醇(BDO)导入反应器中，并在金属氧化物催化剂的存在下进行脱氢以提供γ-丁内酯；向反应器供给一甲胺(MMA)水溶液和γ-丁内酯；将由一甲胺和γ-丁内酯的反应生成的N-甲基吡咯烷酮与水分离；将分离出的水与一甲胺混合以提供一甲胺水溶液，所述一甲胺水溶液又导回反应器中。所述制备N-甲基吡咯烷酮的方法的有利之处在于，γ-丁内酯是在催化剂的存在下由丁二醇制备而得，并且收集了由一甲胺和γ-丁内酯的反应生成的水以提供一甲胺水溶液，又将所述一甲胺水溶液供给回反应器，由此节省了能源并实现了产物N-甲基吡咯烷酮的简易分离。
摘要（英）：

The invention provides a method for preparing gamma-butyrolactone (GBL) and N-methylpyrrolidone (NMP), more specifically, a method for preparing NMP, comprising introducing 1,4-butanediol in a reactor, performing dehydrogenation in the presence of metallic oxide catalyst to provide GBL; supplying monomethyl amine (MMA) aqueous solution and GBL to the reactor; separating the NMP generated by the reaction of the MMA and the GBL from the water; mixing the separated water with the MMA to provide the MMA aqueous solution; and leading the MMA aqueous solution back into the reactor. Since the GBL is prepared from the butanediol in the presence of the catalyst, the water generated from the reaction of the MMA and the GBL is collected to provide the MMA aqueous solution, and the MMA aqueous solution is returned to the reactor, the prepared NMP has the advantages that energy is saved and simple separation of the product NMP is realized.

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