公开(公告)号：EP1636178B1

公开(公告)日：2006-12-20

申请号：EP04755552.9

申请日：2004-06-17

Applicant: INVISTA Technologies S.à.r.l.

Inventor： KIRBY, Gregory S. ,  OSTERMAIER, John J.

IPC: C07D201/08

CPC classification number: C07D223/04

Abstract: Method for making caprolactam from 6-aminocapronitrile that contains greater than 500 ppm tetrahydroazepine and its derivatives (THA) in which ammonia and water are removed from crude caprolactam in a single separation step and then THA is removed from the resulting caprolactam melt.

Abstract translation: 由含有大于500ppm四氢吖庚因及其衍生物（THA）的6-氨基己腈制备己内酰胺的方法，其中在单一分离步骤中从粗己内酰胺中除去氨和水，然后从所得己内酰胺熔体中除去THA。

公开(公告)号：EP1636178A1

公开(公告)日：2006-03-22

申请号：EP04755552.9

申请日：2004-06-17

Applicant: INVISTA Technologies S.à.r.l.

Inventor： KIRBY, Gregory S. ,  OSTERMAIER, John J.

IPC: C07D201/08

CPC classification number: C07D223/04

Abstract: Method for making caprolactam from 6-aminocapronitrile that contains greater than 500 ppm tetrahydroazepine and its derivatives (THA) in which ammonia and water are removed from crude caprolactam in a single separation step and then THA is removed from the resulting caprolactam melt.