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公开(公告)号:US20030065169A1
公开(公告)日:2003-04-03
申请号:US10210878
申请日:2002-08-02
Applicant: DSM N.V.
Inventor: Frank P.W. Agterberg , Rudolf P.M. Guit , Matthias R.J. Offermanns
IPC: C07D21/08 , C08G069/08 , C08G073/10
CPC classification number: C07D201/12 , C07D201/08
Abstract: A process for the preparation of null-caprolactam starting from 6-aminocaproic acid, 6-aminocaproamide, 6-aminocaproic ester, 6-aminocapronitrile, oligomers or polymers of these compounds or mixtures comprising at least two of these compounds, which process is performed in the presence of N-(5-carboxypentyl)-null-caprolactam and/or derivative thereof in an amount of less than 50 wt. % and more than 0.1 wt. % (based on the total reaction mixture).
Abstract translation: 从6-氨基己酸,6-氨基己酰胺,6-氨基己酸酯,6-氨基己腈,这些化合物的低聚物或聚合物或包含这些化合物中的至少两种的混合物制备ε-己内酰胺的方法,该方法在 N-(5-羧戊基) - 己内酰胺和/或其衍生物的存在量小于50wt。 %和大于0.1wt。 %(基于总反应混合物)。