Recovery of N-ethylpiperazine by distillation
    1.
    发明授权
    Recovery of N-ethylpiperazine by distillation 失效
    通过蒸馏回收N-乙基哌嗪

    公开(公告)号:US5626724A

    公开(公告)日:1997-05-06

    申请号:US510562

    申请日:1995-08-02

    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。