公开(公告)号：DE3244522A1

公开(公告)日：1984-06-07

申请号：DE3244522

申请日：1982-12-02

Applicant: BASF AG

Inventor： BAUR KARL GERHARD DR ,  DIEHL VOLKER DR ,  STOPS PETER ,  HELLBACH HANS ,  BRUNNER ERWIN DR

IPC: C07D213/82 ,  C07D213/803 ,  C07D213/81

Abstract: A process for the preparation of nicotinamide by amidation of a nicotinic acid/nicotinamide melt, vacuum distillation of the amidation mixture, removal of the nicotinamide as the bottom product and recycling of the top product, depleted with respect to nicotinamide, into the amidation stage together with addition of fresh amounts of nicotinic acid.

公开(公告)号：DE19500031A1

公开(公告)日：1996-07-04

申请号：DE19500031

申请日：1995-01-02

Applicant: BASF AG

Inventor： BAUR KARL GERHARD DR ,  BRUNNER ERWIN DR ,  BRANDT ECKHARDT DR

IPC: C07D307/89 ,  B01D3/14 ,  C07C51/573 ,  C07C63/68

公开(公告)号：DE3619173A1

公开(公告)日：1987-12-10

申请号：DE3619173

申请日：1986-06-06

Applicant: BASF AG

Inventor： RIEBER NORBERT DR ,  FISCHER ROLF DR ,  BRUNNER ERWIN DR ,  LUYKEN HERMANN ,  VAGT UWE DR

IPC: C07C7/06 ,  C07C1/00 ,  C07C7/04 ,  C07C13/18 ,  C07C13/20 ,  C07C67/00 ,  C07C15/04

公开(公告)号：DE3560109D1

公开(公告)日：1987-05-07

申请号：DE3560109

申请日：1985-01-25

Applicant: BASF AG

Inventor： BRUNNER ERWIN DR ,  GROSSKINSKY OTTO-ALFRED DR ,  HERRMANN GUENTER DR ,  KROKOSZINSKI ROLAND DR ,  MAGNUSSEN PETER DR

IPC: C07C27/12 ,  C07C27/00 ,  C07C29/50 ,  C07C35/08 ,  C07C45/00 ,  C07C45/33 ,  C07C49/403 ,  C07C67/00 ,  C07C407/00 ,  C07C409/06 ,  C07C409/14 ,  C07C179/053 ,  C07C178/00

公开(公告)号：DE3061677D1

公开(公告)日：1983-02-24

申请号：DE3061677

申请日：1980-07-01

Applicant: BASF AG

Inventor： VOLKAMER KLAUS DR ,  LINDNER ALFRED DR ,  MERGER FRANZ DR ,  WAGNER ULRICH DR ,  BRUNNER ERWIN DR ,  SANDROCK GERHARD DR ,  STROHMEYER MAX DR

IPC: C07C41/05 ,  C07C1/00 ,  C07C7/148 ,  C07C11/09 ,  C07C41/00 ,  C07C41/06 ,  C07C43/04 ,  C07C67/00

Abstract: A process for conjointly preparing methyl tert.-butyl ether and obtaining isobutene from an isobutene-containing C4-hydrocarbon mixture. In the process the C4-hydrocarbon mixture is reacted, in one or more etherification stages, with methanol and a primary C3- or C4-alcohol in the presence of an acid condensing agent, the resulting reaction mixture or mixtures are then separated into a fraction containing the unconverted hydrocarbons, the methyl tert.-butyl ether and a fraction containing the C3- or C4-alkyl tert.-butyl ether. Thereafter, the C3- or C4-alkyl tert.-butyl ether is decomposed at an elevated temperature, in the presence of an acid catalyst, into isobutene and primary C3- or C4-alcohol.

公开(公告)号：DE3362041D1

公开(公告)日：1986-03-13

申请号：DE3362041

申请日：1983-11-23

Applicant: BASF AG

Inventor： BAUR KARL GERHARD DR ,  DIEHL VOLKER DR ,  STOPS PETER ,  HELLBACH HANS ,  BRUNNER ERWIN DR

IPC: C07D213/82 ,  C07D213/803 ,  C07D213/81

Abstract: A process for the preparation of nicotinamide by amidation of a nicotinic acid/nicotinamide melt, vacuum distillation of the amidation mixture, removal of the nicotinamide as the bottom product and recycling of the top product, depleted with respect to nicotinamide, into the amidation stage together with addition of fresh amounts of nicotinic acid.

公开(公告)号：DE2261636A1

公开(公告)日：1974-06-20

申请号：DE2261636

申请日：1972-12-16

Applicant: BASF AG

Inventor： FUERST ERNST DR ,  BRUNNER ERWIN DR

IPC: B01D53/14 ,  C01B17/60 ,  B01D53/34

公开(公告)号：DE2216733A1

公开(公告)日：1973-10-18

申请号：DE2216733

申请日：1972-04-07

Applicant: BASF AG

Inventor： HOFFMANN HERWIG DR ,  FUERST ERNST DR ,  BRUNNER ERWIN DR ,  WINDERL SIEGFRIED DR

IPC: B01D53/50 ,  B01D53/14

Abstract: is removed from gases by adsorption in a solvent of formula where n = 0-3; R = - (where R1 = 1-3C alkyl) followed by desorption of the dissolved SO2. The solvents are stable up to 140 degrees C have low vapour pres. and are non-corrosive.

公开(公告)号：DE2142104A1

公开(公告)日：1973-03-01

申请号：DE2142104

申请日：1971-08-23

Applicant: BASF AG

Inventor： HOFFMANN HERWIG DR ,  FUERST ERNST DR ,  WINDERL SIEGFRIED DR ,  BRUNNER ERWIN DR

IPC: B01D53/14 ,  B01D53/50 ,  B01D53/77 ,  B01D53/34

公开(公告)号：AT73438T

公开(公告)日：1992-03-15

申请号：AT88106699

申请日：1988-04-27

Applicant: BASF AG

Inventor： MERGER FRANZ DR ,  HETTINGER PETER DR ,  HUPFER LEOPOLD DR ,  PAETSCH JUERGEN DR ,  DECK HERIBERT ,  AUER HEINZ ,  BRUNNER ERWIN DR

IPC: C07C69/06 ,  C07C27/00 ,  C07C27/02 ,  C07C29/38 ,  C07C29/74 ,  C07C29/88 ,  C07C31/22 ,  C07C67/00 ,  C07C67/03 ,  C07C67/08 ,  C07C67/54 ,  C07C209/00 ,  C07C209/82 ,  C07C209/86 ,  C07C211/03 ,  C07C211/05