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公开(公告)号:US5626724A
公开(公告)日:1997-05-06
申请号:US510562
申请日:1995-08-02
申请人: Klaus-Dieter Malsch , Douglas Hutton , Ernst Lang
发明人: Klaus-Dieter Malsch , Douglas Hutton , Ernst Lang
IPC分类号: C07D295/02 , C07D295/023 , C07D295/03 , B01D3/10 , B01D3/38
CPC分类号: C07D295/03 , C07D295/023
摘要: In a process for the recovery of N-ethylpiperazine by distillation from mixtures with N,N'-diethylpiperazine, piperazine, ethanol, water and accompanying substances, water is added in a manner such that, at the location of the addition of the water, the piperazine concentration is greater than the N-ethylpiperazine concentration. The water may be added to the reflux to the top of the column.
摘要翻译: 在与N,N'-二乙基哌嗪,哌嗪,乙醇,水和伴随物质的混合物中蒸馏回收N-乙基哌嗪的方法中,加入水,使得在添加水的位置, 哌嗪浓度大于N-乙基哌嗪浓度。 水可以加入回流至塔顶。