| 摘要 |
The invention relates to a lactam production method. More specifically, the invention relates to a method of producing lactams from alkyl cyanovalerate compounds obtained using, for example, unsaturated mononitrile compounds as raw materials and, more particularly, pentenenitriles such as 2-, 3-, 4-pentenenitriles taken alone or in a mixture and hereafter referred to as PN for the mixture and 2PN, 3PN and 4PN respectively. The inventive method comprises the hydrogenation and the cyclization of the alkyl cyanovalerate into e-caprolaclam without the intermediate separation of the akylaminocaproate. |
