发明授权
- 专利标题: Dewatering and purification of crude pyrrolidine
- 专利标题(中): 脱水和纯化粗吡咯烷
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申请号: US09716835申请日: 2000-11-20
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公开(公告)号: US06353118B1公开(公告)日: 2002-03-05
- 发明人: Joachim Simon , Peter Wahl , Willi Schmidt
- 申请人: Joachim Simon , Peter Wahl , Willi Schmidt
- 优先权: DE19957672 19991130
- 主分类号: C07O295023
- IPC分类号: C07O295023
摘要:
In a process for purifying crude pyrrolidine to give a pyrrolidine composition comprising more than 99% (m/m) of pyrrolidine and less than 0.3% (m/m) of water, crude pyrrolidine comprising from 40 to 98% (m/m) of pyrrolidine and having a water content of more than 2% (m/m) is subjected to continuous distillation at a pressure at the top of less than 950 hPa in a column having a stripping section and a rectifying section.
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