发明授权
- 专利标题: Process for working-up aqueous amine solutions
- 专利标题(中): 处理胺水溶液的方法
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申请号: US14759申请日: 1987-02-13
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公开(公告)号: US4720326A公开(公告)日: 1988-01-19
- 发明人: Heiko Beckhaus , Harro Witt , Dieter Becher , Hermann Dallmeyer , Uwe J. Zarnack
- 申请人: Heiko Beckhaus , Harro Witt , Dieter Becher , Hermann Dallmeyer , Uwe J. Zarnack
- 申请人地址: DEX Leverkusen
- 专利权人: Bayer Aktiengesellschaft
- 当前专利权人: Bayer Aktiengesellschaft
- 当前专利权人地址: DEX Leverkusen
- 优先权: DEX3607665 19860308
- 主分类号: C07C209/84
- IPC分类号: C07C209/84 ; C07C67/00 ; C07C209/00 ; C07C209/36 ; C07C211/50 ; C07C211/51 ; B01D3/00
摘要:
An amine is separated from an aqueous solution of amine and volatile organic compounds by distillation in a column. The vapors generated during distillation are condensed. The condensed vapors are then passed into a separating device in which the volatile organic compounds are removed. The liquid remaining in the separating device is then fed to the head of the distillation column. Water is removed from the column in a sidestream and diamine is the residue. This process is particularly effective in recovering aromatic diamines from solutions which accumulate during hydrogenation of dinitro aromatic compounds.
公开/授权文献
- US5259094A Shoe lacing apparatus 公开/授权日:1993-11-09
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