Synthesis method of valerolactam

The invention relates to the field of chemical engineering, in particular to a synthetic method of valerolactam, which comprises the following steps: mixing cyclopentanone and cyclohexanone serving as a reaction aid according to a certain proportion, carrying out ammoximation reaction, Beckmann rearrangement reaction and hydrolysis neutralization reaction, and then separating to obtain the valerolactam. The method disclosed by the invention is high in atom utilization rate and high in product extraction rate, and has an actual industrial production prospect. 本发明涉及化工领域，具体涉及一种戊内酰胺的合成方法，步骤为：将环戊酮与反应助剂环己酮按照一定比例混合，经过氨肟化反应、Beckmann重排反应、水解中和反应，随后经分离，得到戊内酰胺。本发明方法原子利用率高、且产物萃取率高，具有实际工业投产前景。