公开(公告)号：DE3887434D1

公开(公告)日：1994-03-10

申请号：DE3887434

申请日：1988-10-11

Applicant: BASF AG

Inventor： NEUBAUER GERALD DR ,  DE DECKER EMILE ,  FUCHS HUGO DR ,  HOLZKNECHT BERNHARD DR ,  RITZ JOSEF DR

IPC: C07D201/16

Abstract: Caprolactam is recovered from caprolactam distillation low boilers or high boilers or mixtures thereof by the following steps: (a) crystallizing a low or high boiler or a mixture thereof to form purified capro-lactam crystals and a mother liquor, (b) separating off the purified caprolactam crystals to leave a mother liquor, (c) recycling from 5 to 90% by weight of the mother liquor of stage (b) into stage (a) and transferring the remainder of the mother liquor into the subsequent stage (d), (d) crystallizing the remaining mother liquor portion from stage (c) to form caprolactam crystals and a mother liquor, separating off the caprolactam crystals of stage (e) (d) and recycling the same into stage (a) to leave a mother liquor, (f) recycling from 20 to 99% by weight of mother liquor of stage (e) into stage (d) and channeling out the remainder of the impurity-containing mother liquor of stage (e).

公开(公告)号：ES2044660T3

公开(公告)日：1994-01-01

申请号：ES91111255

申请日：1991-07-06

Applicant: BASF AG

Inventor： STEIGLEITER WERNER ,  HOELDERICH WOLFGANG DR ,  WEISS FRANZ-JOSEF DR ,  FUCHS HUGO DR ,  GUNS LUC ,  NEUBAUER GERALD DR ,  RITZ JOSEF DR

IPC: B01J21/18 ,  B01J23/42 ,  B01J27/02 ,  B01J37/20 ,  C01B21/14

Abstract: A platinum-on-graphite catalyst having a platinum content of from 0.01 to 5% w/w, wherein the graphite support has an apparent density of from 1.7 to 2.2 g/ml and the use thereof as a hydrogenation catalyst.

公开(公告)号：DE59100453D1

公开(公告)日：1993-11-11

申请号：DE59100453

申请日：1991-07-09

Applicant: BASF AG

Inventor： WEISS FRANZ-JOSEF DR ,  FUCHS HUGO DR ,  STEIGLEITER WERNER ,  HOELDERICH WOLFGANG DR ,  GUNS LUC ,  NEUBAUER GERALD DR ,  RITZ JOSEF DR

IPC: B01J21/18 ,  B01J23/42 ,  B01J27/02 ,  B01J35/02 ,  B01J35/10 ,  C01B21/14

Abstract: Platinum catalysts on a graphite support, having a platinum content from 0.01 to 5 % by weight, are characterised in that the graphite support has a grain surface area of from 1 to 30 m /g. … 183 to 600 mu m 15% by volume +/- 15% absolute 68.3 to 183 mu m 30% by volume +/- 20% 31.0 to 68.3 mu m 25% by volume +/- 20% 17.1 to 31.0 mu m 15% by volume +/- 10% 5.2 to 17.1 mu m 12% by volume +/- 10% 5.2 mu m 5% by volume +/- 5% …

公开(公告)号：DE4213009A1

公开(公告)日：1993-10-28

申请号：DE4213009

申请日：1992-04-21

Applicant: BASF AG

Inventor： FUCHS HUGO DR ,  RITZ JOSEF DR ,  NEUBAUER GERALD DR

IPC: B65D65/38 ,  B65D85/00 ,  B29B17/00 ,  C07D223/10 ,  C08J11/04 ,  C08J11/14 ,  C08L77/02

公开(公告)号：DE4132800A1

公开(公告)日：1993-04-08

申请号：DE4132800

申请日：1991-10-02

Applicant: BASF AG

Inventor： WILMS AXEL DR ,  MAGNUSSEN PETER DR ,  NEUBAUER GERALD DR ,  RITZ JOSEF DR ,  FUCHS HUGO DR ,  THOMAS ERWIN ,  GUNS LUC

IPC: C01B21/14

公开(公告)号：DE4022851A1

公开(公告)日：1992-01-23

申请号：DE4022851

申请日：1990-07-18

Applicant: BASF AG

Inventor： STEIGLEITER WERNER ,  HOELDERICH WOLFGANG DR ,  WEISS FRANZ-JOSEF DR ,  FUCHS HUGO DR ,  GUNS LUC ,  NEUBAUER GERALD DR ,  RITZ JOSEF DR

IPC: B01J21/18 ,  B01J23/42 ,  B01J27/02 ,  B01J37/20 ,  C01B21/14

Abstract: A platinum-on-graphite catalyst having a platinum content of from 0.01 to 5% w/w, wherein the graphite support has an apparent density of from 1.7 to 2.2 g/ml and the use thereof as a hydrogenation catalyst.

公开(公告)号：DE3861542D1

公开(公告)日：1991-02-21

申请号：DE3861542

申请日：1988-04-14

Applicant: BASF AG

Inventor： FUCHS HUGO DR ,  RITZ JOSEF DR ,  THOMAS ERWIN ,  WEISS FRANZ-JOSEF DR

IPC: B01J23/42 ,  C01B21/14

Abstract: Hydroxylammonium salts are prepared by catalytic reduction of nitrogen monoxide with hydrogen at elevated temperature in a dilute aqueous solution of a mineral acid in the presence, in suspension, of a supported platinum catalyst obtainable by precipitating metallic platinum from an aqueous platinum solution onto a support by means of a reducing agent in the presence of an organic chelating agent and partially poisoned with sulfur.

公开(公告)号：DE3925575A1

公开(公告)日：1991-02-07

申请号：DE3925575

申请日：1989-08-02

Applicant: BASF AG

Inventor： NEUBAUER GERALD DR ,  RITZ JOSEF DR ,  FUCHS HUGO DR ,  AGAR DAVID DR ,  FISCHER ROLF DR ,  VAGT UWE DR

IPC: C07D223/10 ,  C07D201/16

Abstract: Caprolactam is purified continuously by passing a 75-95% strength by weight aqueous caprolactam solution together with hydrogen at 50 DEG -95 DEG C. and 1.5-100 bar upward through a fixed-bed supported palladium or nickel catalyst in a tubular zone while maintaining a residence time of from 10 to 100 min.

公开(公告)号：DE3839448A1

公开(公告)日：1990-06-13

申请号：DE3839448

申请日：1988-11-23

Applicant: BASF AG

Inventor： FUCHS HUGO DR ,  AGAR DAVID DR ,  NEUBAUER GERALD DR ,  RITZ JOSEF DR

IPC: C07C249/14 ,  C07C251/44

Abstract: The storability of molten cyclohexanone oxime containing 0.5-15% by weight of cyclohexanone and 1-8% by weight of aqueous ammonium bisulfate solution is improved by washing the molten cyclohexanone oxime with a 10-42% strength by weight aqueous ammonium sulfate solution and maintaining a pH of 4.5-5.8.

公开(公告)号：DE3345734A1

公开(公告)日：1985-06-27

申请号：DE3345734

申请日：1983-12-17

Applicant: BASF AG

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

IPC: C07D215/26 ,  C01B21/14 ,  C07C51/42 ,  C07C53/10 ,  C07C53/122

Abstract: Stabilized solutions of hydroxylamine or its salts in water or alcohols, containing 8-hydroxyquinaldines, and their preparation.