公开(公告)号：DE4322953A1

公开(公告)日：1995-01-12

申请号：DE4322953

申请日：1993-07-09

Applicant: BASF AG

Inventor： FUCHS HUGO DR ,  RITZ JOSEF DR ,  WILFINGER HANS JOERG DR ,  WEATHERFORD DAVID DR

IPC: C07D201/12 ,  C07D201/16 ,  C08J11/10 ,  C08J11/14 ,  C08L77/02 ,  C07D233/10 ,  C01D7/00

Abstract: Recovery of caprolactam and of an alkali metal carbonate from distillation residues which are obtained in the purification of caprolactam and contain caprolactam and/or oligomers and/or polymers of caprolactam, and alkali metal hydroxides, by (a) melting the distillation residues, which contain caprolactam and/or oligomers and/or polymers of caprolactam, and alkali metal hydroxides, (b) continuously removing caprolactam from the melt, (c) cooling the melt after removing caprolactam with obtainment of a residue, (d) dissolving the residue thus obtained in water and (e) subjecting the aqueous solution thus obtained to incineration with the formation of an alkali metal carbonate.