A method for producing a high purity, high quality amide compound, particularly a lactam. An amount of each of a halide, an aldehyde compound, an alcohol compound and a nitrile compound contained in a solution recycled into an oxime-forming step is controlled to an amount of 0.4 mol % or less based on the ketone as a starting material. One or more of a ketone, an oxime and an amide compound are purified by hydrogenation and/or crystallization for eliminating impurities containing a double bond. A content of impurities having a cyclic bridge structure is controlled using a cycloalkanone purified by recrystallization.
一种生产高纯度、高质量酰胺化合物,特别是内酰胺的方法。通过控制溶液中含有的卤化物、醛类化合物、
醇类化合物和
腈类化合物的数量,使其在氧
肟化步骤中回收的量基于以酮为起始物质的量不超过0.4摩尔%。通过氢化和/或结晶纯化酮、氧
肟和/或酰胺化合物中的一个或多个,以消除含有双键的杂质。通过再结晶纯化的环烷酮来控制含有环桥结构的杂质的含量。