| 摘要 |
PURPOSE:To obtain a phenylenediamine useful as a raw material for heat-resistant polyamide, etc. simply, efficiently in high purity, by bringing a liquid crude phenylenediamine into contact with an alkali metal hydroxide or an alkaline earth metal hydroxide. CONSTITUTION:A liquid crude phenylenediamine containing a small amount of impurities such as phenols, aminophenols, acid components, etc. is brought into contact with at least one of an alkali metal hydroxide or an alkaline earth metal hydroxide (preferably sodium hydroxide, magnesium hydroxide, calcium hydroxide, barium hydroxide, etc.), or it is distilled and evaporated in the presence of at least one above-mentioned hydroxide, so that the phenylenediamine is purified.
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