Method for purification of pyridine, and method for production of chlorinated pyridine

Disclosed is a method for purifying crude pyridine on an industrial scale, at low cost, and in a simple manner. Specifically disclosed is a pyridine purification method comprising treating crude pyridine with an alkali and distilling the resulting product, or a pyridine purification method comprisin...

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Bibliographic Details
Main Authors KONISHI HIROTSUGU, LI CHUN, YOSHIDA KATSUHIKO, BANDO SEIJI, YOSHIKAWA NAOHIRO
Format Patent
LanguageChinese
English
Published 23.02.2011
Subjects
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Summary:Disclosed is a method for purifying crude pyridine on an industrial scale, at low cost, and in a simple manner. Specifically disclosed is a pyridine purification method comprising treating crude pyridine with an alkali and distilling the resulting product, or a pyridine purification method comprising adding an acid or water to crude pyridine, treating the resulting mixture with an alkali and distilling the resulting product. The purification method can purify crude pyridine on an industrial scale, at low cost, and in a simple manner. Pyridine obtained by the method has a high purity, and is therefore useful as a starting material for various types of organic synthesis. For example, by reacting the purified pyridine with chlorine, chlorinated pyridine can be produced in high yield.
Bibliography:Application Number: CN200980111084