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公开(公告)号：DE59702998D1
公开(公告)日：2001-03-22
申请号：DE59702998
申请日：1997-11-24
Applicant: BASF AG
Inventor： EGLY HORST , HUENGER HANS-HARALD , SAUER DR
IPC: C07D201/16
Abstract: A process for recovering caprolactam and its oligomers by removing inorganic impurities from aqueous polycaprolactam extracts, in which the aqueous extract is continuously passed through an evaporator in such a way that the impurities are deposited on the heat exchange surfaces of the evaporator.
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