公开(公告)号：DK162833B

公开(公告)日：1991-12-16

申请号：DK600684

申请日：1984-12-14

Applicant: BASF AG

Inventor： GROSSKINSKY OTTO-ALFRED ,  FROMMER ELMAR ,  RITZ JOSEF ,  THOMAS ERWIN ,  WEISS FRANZ-JOSEF

IPC: C07D307/62 ,  C01B21/14 ,  C07C51/42 ,  C07C53/10 ,  C07C53/122

Abstract: Stabilized solutions of hydroxylamine or its salts in water or alcohols, containing the lactone of the formula I and their preparation.

公开(公告)号：DK162831B

公开(公告)日：1991-12-16

申请号：DK570184

申请日：1984-11-30

Applicant: BASF AG

Inventor： GROSSKINSKY OTTO-ALFRED ,  FROMMER ELMAR ,  RITZ JOSEF ,  THOMAS ERWIN ,  WEISS FRANZ-JOSEF

IPC: C01B21/14 ,  C07C51/42 ,  C07C53/10 ,  C07C53/122

公开(公告)号：DK570384A

公开(公告)日：1985-06-03

申请号：DK570384

申请日：1984-11-30

Applicant: BASF AG

Inventor： GROSSKINSKY OTTO-ALFRED ,  FROMMER ELMAR ,  RITZ JOSEF ,  THOMAS ERWIN ,  WEISS FRANZ-JOSEF

IPC: C01B21/14 ,  C07C51/42 ,  C07C53/10 ,  C07C53/122 ,  C01B

Abstract: Stabilized solutions of hydroxylamine or its salts in water or alcohols, containing hydroxyanthraquinones, and their preparation.

公开(公告)号：CA1138865A

公开(公告)日：1983-01-04

申请号：CA354720

申请日：1980-06-25

Applicant: BASF AG

Inventor： FUCHS HUGO ,  GROSSKINSKY OTTO-ALFRED ,  FROMMER ELMAR ,  KARTTE KLAUS

IPC: C07D201/02 ,  C07D201/16 ,  C07D223/10

Abstract: A process for purifying caprolactam which has been obtained by Beckmann rearrangement, which process comprises: (a) extracting crude caprolactam with solvents; (b) distilling the extract in the presence of alkali and isolating pure caprolactam; (c) treating the distillation residue from (b) by distilling off caprolactam at a bottom temperature of 130 - 160.degree.C and recycling the caprolactam obtained to distillation stage (b); (d) distilling the residue thus obtained at (c) at a bottom temperature of 140 - 180.degree.C; and (e) treating the distillate obtained in (d) with strongly acidic agents and recycling the treated distillate to extraction stage (a).