发明名称 |
Preparation of UV grade synthetic pyridine. |
摘要 |
<p>A method of preparing UV-grade synthetic pyridine from a pyridine-containing reaction product mixture which also contains at least one other compound which is UV absorbing to a sufficient extent that said pyridine mixture is not UV grade, said mixture being obtained from the condensation reaction, over an effective catalyst, of one of more aldehydes and/or ketones with one or more amines and/or ammonia, comprises recovering from said mixture a pyridine-water azeotrope effective to separate pyridine therefrom sufficiently free of UV-absorbing compounds to be UV grade.</p> |
申请公布号 |
EP0339594(A2) |
申请公布日期 |
1989.11.02 |
申请号 |
EP19890107515 |
申请日期 |
1989.04.26 |
申请人 |
NEPERA, INC. |
发明人 |
FEITLER, DAVID;WETSTEIN, HENRY |
分类号 |
C07D213/09;C07D213/06;C07D213/10 |
主分类号 |
C07D213/09 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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