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A method of purifying caprolactam obtenidapor Beckmann rearrangement or by nitrosation of compounds ciclohexilicos
A method of purifying caprolactam obtenidapor Beckmann rearrangement or by nitrosation of compounds ciclohexilicos
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机译:一种提纯己内酰胺奥贝替尼泊尔贝克曼重排或通过亚硝化环己酮化合物的方法
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摘要
The invention is concerned with a method of purifying caprolactam as obtained by Beckmann transposition or by nitrosation of cyclohexyl compounds, characterized in that it comprises the following steps: (a) the caprolactam oil is treated with ammonia to obtain a pH in the 8 to 10 range; (b) the caprolactam in water-ammonia solution yielded by (a) is extracted with toluene; (c1) any caprolactam still in the toluene solution yielded by (b) is treated with NaOH; (C2) the aqueous phase left over from the extraction with toluene (b) is removed.
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