Method for continuously distilling and removing piperazine from mixture of ethylenediamine and piperazine
    1.
    发明专利
    Method for continuously distilling and removing piperazine from mixture of ethylenediamine and piperazine 有权
    从乙烯胺和哌嗪的混合物中连续蒸馏和去除哌嗪的方法

    公开(公告)号:JP2007051142A

    公开(公告)日:2007-03-01

    申请号:JP2006216786

    申请日:2006-08-09

    CPC classification number: C07D295/00

    Abstract: PROBLEM TO BE SOLVED: To improve qualities of piperazine, especially its color and color stability in a method for continuously distilling and removing piperazine from a mixture of ethylenediamine and piperazine by distilling the mixture under high-pressure at elevated temperature, discharging ethylenediamine from the top of a distillation column and piperazine from the bottom of the distillation column. SOLUTION: The method for continuously distilling and removing piperazine from a mixture of ethylenediamine and piperazine comprises a process of direct circulation treatment in which piperazine discharged from the bottom of the distillation column is transported through an evaporation apparatus operated at about 160-about 170°C and returned to the distillation apparatus and a process in which piperazine is retained in a system for the circulation treatment for 30-about 60 minutes and then discharged in a state of vapor from a side discharge port at the bottom of the distillation column. COPYRIGHT: (C)2007,JPO&INPIT

    Abstract translation: 要解决的问题:为了提高哌嗪的质量,特别是在高温下通过在高温下蒸馏混合物从乙二胺和哌嗪的混合物中连续蒸馏除去哌嗪的方法中的颜色和颜色稳定性,将乙二胺 从蒸馏塔的顶部和来自蒸馏塔底部的哌嗪。 解决方案:从乙二胺和哌嗪的混合物中连续蒸馏除去哌嗪的方法包括直接循环处理的方法,其中从蒸馏塔底部排出的哌嗪通过在约160-约 170℃,返回到蒸馏装置中,并且在循环处理体系中保留哌嗪30〜约60分钟,然后以蒸气状态从蒸馏塔底部的侧排出口排出的方法 。 版权所有(C)2007,JPO&INPIT

    6.
    发明专利
    未知

    公开(公告)号:DE102005038376A1

    公开(公告)日:2007-02-15

    申请号:DE102005038376

    申请日:2005-08-13

    Applicant: BASF AG

    Abstract: Continuous distillative separation of piperazine from ethylenediamine-piperazine mixture comprises subjecting the piperazine mixture into a cyclic motion, introducing the piperazine mixture into an evaporator unit at 160-170[deg]C, recycling the piperazine mixture into a distillation column and removing the piperazine from the sump of the distillation column after a retention time of approximately 30-60 minutes, where the ethylene diamine is discharged at the upper portion of the distillation column.

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