| abstract |
The present invention relates to a process for preparing lactams from dinitriles. More specifically, it consists of a process for preparing lactam, linking two steps, one of the halfhydrogenation of dinitrile to aminonitrile, the other of cyclizing hydrolysis of the aminonitrile after only a simple purification operation. Aliphatic lactams, such as in particular epsilon-caprolactam, are basic compounds for the preparation of polyamides (polyamide-6 from caprolactam). |