公开(公告)号：DE3800308A1

公开(公告)日：1989-07-20

申请号：DE3800308

申请日：1988-01-08

Applicant: BASF AG

Inventor： MICHL GERHARD ,  SEUBERT ROLF DR ,  SCHMIDT JOHANNES E DR

IPC: C07D307/60 ,  C07C51/573

公开(公告)号：ES2058974T3

公开(公告)日：1994-11-01

申请号：ES91106180

申请日：1991-04-18

Applicant: BASF AG

Inventor： AICHINGER HEINRICH DR ,  RUPPEL WILHELM DR ,  SEUBERT ROLF DR ,  BOEHNING KARL-HEINZ DR ,  SCHEIDMEIR WALTER DR ,  SCHMIDT JOHANNES DR ,  SCHWARZMANN MATTHIAS DR

IPC: B01J23/18 ,  B01J8/02 ,  B01J23/22 ,  B01J27/198 ,  C07B61/00 ,  C07C51/265 ,  C07D307/89

Abstract: Preparation of phthalic anhydride in a tubular reactor equipped with separate salt baths, in which the first catalyst bed relative to the direction of flow is operated at a salt bath temperature which is higher by 2 to 20 DEG C than the following bed or the following beds.

公开(公告)号：DE59102994D1

公开(公告)日：1994-10-27

申请号：DE59102994

申请日：1991-04-18

Applicant: BASF AG

Inventor： AICHINGER HEINRICH DR ,  RUPPEL WILHELM DR ,  SEUBERT ROLF DR ,  BOEHNING KARL-HEINZ DR ,  SCHEIDMEIR WALTER DR ,  SCHMIDT JOHANNES DR ,  SCHWARZMANN MATTHIAS DR

IPC: B01J23/18 ,  B01J8/02 ,  B01J23/22 ,  B01J27/198 ,  C07B61/00 ,  C07C51/265 ,  C07D307/89

Abstract: Preparation of phthalic anhydride in a tubular reactor equipped with separate salt baths, in which the first catalyst bed relative to the direction of flow is operated at a salt bath temperature which is higher by 2 to 20 DEG C than the following bed or the following beds.

公开(公告)号：AT103281T

公开(公告)日：1994-04-15

申请号：AT88121929

申请日：1988-12-31

Applicant: BASF AG

Inventor： MICHL GERHARD ,  SEUBERT ROLF DR ,  SCHMIDT JOHANNES E DR

IPC: C07D307/60 ,  C07C51/573

公开(公告)号：DE3664633D1

公开(公告)日：1989-08-31

申请号：DE3664633

申请日：1986-02-03

Applicant: BASF AG

Inventor： ZIMMERLING DIETER ,  SCHMIDT JOHANNES E DR ,  SEUBERT ROLF DR ,  FISCHER KARL DR ,  SAUER FRIEDRICH

IPC: C07D307/60 ,  C07C51/573

Abstract: 1. A process for obtaining very pure maleic anhydride having a stable color by fractional distillation of crude maleic anhydride, wherein the maleic anhydride vapor which has been separated off from low boilers and high boilers and contains not less than 98% by weight of maleic anhydride is partially condensed so that from 0,5 to 15% by weight of the maleic anhydride vapor is separated off from the vapor phase as a liquid precondensate, and the remaining very pure maleic anhydride vapor is then completely condensed.

公开(公告)号：DE1767074B1

公开(公告)日：1972-05-31

申请号：DE1767074

申请日：1968-03-28

Applicant: BASF AG

Inventor： OETTINGER WILLI DR-ING ,  SEUBERT ROLF DR

IPC: B01J29/06 ,  C01B39/02 ,  C10G47/16 ,  C10B33/26

公开(公告)号：DE3888667D1

公开(公告)日：1994-04-28

申请号：DE3888667

申请日：1988-12-31

Applicant: BASF AG

Inventor： MICHL GERHARD ,  SEUBERT ROLF DR ,  SCHMIDT JOHANNES E DR

IPC: C07D307/60 ,  C07C51/573

公开(公告)号：AT44956T

公开(公告)日：1989-08-15

申请号：AT86101378

申请日：1986-02-03

Applicant: BASF AG

Inventor： ZIMMERLING DIETER ,  SCHMIDT JOHANNES E DR ,  SEUBERT ROLF DR ,  FISCHER KARL DR ,  SAUER FRIEDRICH

IPC: C07D307/60 ,  C07C51/573

公开(公告)号：DE3504146A1

公开(公告)日：1986-08-07

申请号：DE3504146

申请日：1985-02-07

Applicant: BASF AG

Inventor： ZIMMERLING DIETER ,  SCHMIDT JOHANNES E DR ,  SEUBERT ROLF DR ,  FISCHER KARL DR ,  SAUER FRIEDRICH

IPC: C07D307/60 ,  C07C51/573

Abstract: 1. A process for obtaining very pure maleic anhydride having a stable color by fractional distillation of crude maleic anhydride, wherein the maleic anhydride vapor which has been separated off from low boilers and high boilers and contains not less than 98% by weight of maleic anhydride is partially condensed so that from 0,5 to 15% by weight of the maleic anhydride vapor is separated off from the vapor phase as a liquid precondensate, and the remaining very pure maleic anhydride vapor is then completely condensed.

公开(公告)号：DE2510994A1

公开(公告)日：1976-09-23

申请号：DE2510994

申请日：1975-03-13

Applicant: BASF AG

Inventor： BLECHSCHMITT KURT ,  REUTER PETER DR ,  WIRTH FRIEDRICH DR ,  BUERGER GERT DR ,  SEUBERT ROLF DR

IPC: C07D307/89 ,  B01J23/22 ,  B01J35/02 ,  B01J35/04 ,  B01J37/02 ,  C07B61/00 ,  C07C51/265 ,  C07C51/31

Abstract: A supported catalyst containing vanadium and titanium, comprising a ring-shaped carrier having an external diameter of from 7.3 to 8.6 mm, a length of from 5.3 to 7 mm and a wall thickness of from 0.1 to 2 mm, and an active composition, applied thereto, of from 1 to 30 per cent by weight of vanadium pentoxide and from 70 to 99 per cent by weight of titanium dioxide and/or zirconium dioxide.