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1. 发明申请

US20070270596A1 Process for the Preparation of N-Alkyl Pyrrolidones 有权
标题翻译： N-烷基吡咯烷酮的制备方法
公开(公告)号：US20070270596A1
公开(公告)日：2007-11-22
申请号：US11570179
申请日：2005-06-01
申请人： John Hensman , Riyaz Khambati
发明人： John Hensman , Riyaz Khambati
IPC分类号： C07D207/267
CPC分类号： C07D207/267
摘要： A process for the production of N-alkylpyrrolidone from γ-butyrolactone and monoalkylamine in the liquid phase comprising the steps of: feeding monoalkylamine and γ-butyrolactone, in the absence of water or in the presence of less than about 1 wt % of water, to a reaction zone to form a reaction mixture; heating the reaction mixture; withdrawing a product stream from the reaction zone and passing the stream to a distillation zone comprising at least one distillation column operated at sub-atmospheric pressure; adding water to the distillation zone; isolating at least one overhead stream from the distillation zone comprising monoalkylamine, water and optionally N-alkyl-pyrrolidone and condensing the overhead stream against cooling water.
摘要翻译：在液相中从γ-丁内酯和单烷基胺生产N-烷基吡咯烷酮的方法，包括以下步骤：在不存在水的情况下或在少于约1重量％的水的存在下加入单烷基胺和γ-丁内酯，反应区形成反应混合物; 加热反应混合物; 从反应区抽出产物流并将物流送至包含至少一个在低于大气压的压力下运行的蒸馏塔的蒸馏区; 向蒸馏区加水; 从包含单烷基胺，水和任选的N-烷基 - 吡咯烷酮的蒸馏区分离至少一个塔顶物流，并将塔顶馏出物与冷却水冷凝。

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