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公开(公告)号：ID26832A
公开(公告)日：2001-02-15
申请号：ID20001836
申请日：1999-03-08
Applicant: BASF AG
Inventor： EIRMANN MATTHIAN , ANSMANN ANDREANS , FLICK KLEMENS
IPC: C07D201/08 , B01J27/18 , C07D213/61 , C07D277/32 , C07D11/08
Abstract: A process for preparing lactams by hydrolytic cyclization of aminonitriles in the gas phase in the presence of a metal phosphate catalyst comprises using a catalyst comprising one or more oligophosphates of the general formula (I)where M is a metal of group 3 or 4 of the periodic table, including the lanthanides, a is >2.5 and
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