公开(公告)号：DE19500871A1

公开(公告)日：1996-07-18

申请号：DE19500871

申请日：1995-01-13

Applicant: BASF AG

Inventor： KROENER RUDI DR ,  LEUTNER BERND DR ,  SCHLAEFER DIETER DR ,  STEINER WOLFGANG DR ,  FRIEDRICH HOLGER DR

IPC: C25B13/00 ,  B29B17/00

Abstract: Process for recycling diaphragms comprises crushing and washing with a washing substrate (I) to produce re-usable material.

公开(公告)号：DE3575291D1

公开(公告)日：1990-02-15

申请号：DE3575291

申请日：1985-07-22

Applicant: BASF AG

Inventor： JUNGBAUER ANTON DR ,  LEUTNER BERND DR ,  JUERGENS GEERD FRIEDRICH DR

IPC: C05D9/02

公开(公告)号：DE3732952A1

公开(公告)日：1989-04-20

申请号：DE3732952

申请日：1987-09-30

Applicant: BASF AG

Inventor： HOPPE KLAUS-DIETER DR ,  LEUTNER BERND DR ,  SCHREINER SIEGFRIED DR

IPC: B01D53/14 ,  B01D53/56

Abstract: Wash solutions containing Fe(II) and Fe(III) chelate complexes and used for removing NOx from waste gases are regenerated by treatment with sodium tetrahydroborate.

公开(公告)号：DE3729669A1

公开(公告)日：1989-03-16

申请号：DE3729669

申请日：1987-09-04

Applicant: BASF AG

Inventor： KOCHANEK WOLFGANG DR ,  LEUTNER BERND DR

IPC: C01D9/04 ,  C25B1/14

Abstract: To produce alkali metal nitrates, alkali metal chloride solution is fed to the anode space (2) of an electrolysis cell (3), the anode space (2) being separated from the cathode space (5) by a permselective cation exchanger membrane (6). Simultaneously fed to the cathode space (5) is a nitric acid/alkali metal nitrate solution whose alkali metal nitrate concentration is not less than 10% by weight and whose HNO3 concentration is between 0.1 and 10% by weight. A solution whose pH does not exceed 5 is removed from the cathode space (5). … …

公开(公告)号：DE3629477A1

公开(公告)日：1988-03-03

申请号：DE3629477

申请日：1986-08-29

Applicant: BASF AG

Inventor： LEUTNER BERND DR ,  MUELLER BERTHOLD DR ,  VOLKENBORN WILHELM DIPL ING

IPC: C04B28/14 ,  C04B38/02 ,  E21F15/00 ,  E21F15/08

Abstract: Cavities in mining are filled by introducing a mixture consisting of a slurry or sludge which evolves CO2, foams and solidifies and predominantly comprises alpha-hemihydrate, alpha-CaSO4. 0.5 H2O, an alkali metal or alkaline earth metal carbonate and water, by a method in which the mixture is mixed with a bisulfate-containing aqueous solution or suspension of one or more metals before being introduced into the cavities to be filled.

公开(公告)号：DE3622364A1

公开(公告)日：1987-01-08

申请号：DE3622364

申请日：1986-07-03

Applicant: BASF AG

Inventor： JUNGBAUER ANTON DR ,  LEUTNER BERND DR ,  RAUBENHEIMER HANS-JUERGEN

IPC: C07C229/76 ,  C07C101/26

Abstract: Preparation of ammonium salts of iron(III)-aminopolycarboxylic acid complexes by reaction of an aminopolycarboxylic acid with iron(III) oxide hydroxide in aqueous medium at temperatures from 50 to 110 DEG C and subsequent neutralisation with ammonia or water-soluble amines.

公开(公告)号：DE3427980A1

公开(公告)日：1986-01-30

申请号：DE3427980

申请日：1984-07-28

Applicant: BASF AG

Inventor： JUNGBAUER ANTON DR ,  LEUTNER BERND DR ,  JUERGENS GEERD FRIEDRICH DR

IPC: C05D9/02 ,  C05G1/00

公开(公告)号：DE3161712D1

公开(公告)日：1984-01-26

申请号：DE3161712

申请日：1981-10-05

Applicant: BASF AG

Inventor： BLANCK KLAUS DR ,  DETHLEFSEN WINFRIED DR ,  JUNGBAUER ANTON DR ,  LEUTNER BERND DR ,  SCHIER ERNST-JUERGEN DR ,  SCHLIMPLER HANS-ULRICH DR ,  SCHNEEHAGE HANS HENNING DR

IPC: C07D251/60 ,  B01D53/86 ,  B01J23/00 ,  B01J23/72 ,  B01J23/745 ,  C01C1/12 ,  C07B61/00 ,  B01D53/36

Abstract: The reaction off-gas from the synthesis of melamine consists, after separating off the melamine, mainly of ammonia and carbon dioxide, with traces of hydrogen cyanide, isocyanic acid, urea and residual melamine. To remove these trace components, the off-gas is passed over a catalyst, containing copper oxide and/or iron oxide, in the presence of steam at from 100 DEG to 500 DEG C.

公开(公告)号：DE2716032A1

公开(公告)日：1978-10-26

申请号：DE2716032

申请日：1977-04-09

Applicant: BASF AG

Inventor： OSTERTAG WERNDER DR ,  WUNSCH GERD DR ,  KIENER VOLKER DR ,  HETZEL ECKHARD DIPL ING ,  SCHREINER SIEGFRIED DR ,  LEUTNER BERND DR ,  SCHLIMPER HANS-ULRICH DR ,  VOELKL ERFRIED DR

IPC: C01B17/66 ,  C07C51/00 ,  C07C53/06 ,  C07C67/00

Abstract: In a process for the manufacture of sodium dithionite by reacting sulfur dioxide with sodium formate and aqueous sodium hydroxide solution in the presence of methanol, an aqueous methanolic solution of sodium formate is first produced by reacting carbon monoxide with sodium hydroxide solution in an aqueous medium, containing from 1 to 50% by weight of methanol, based on the amount of water, at from 80 to 120 DEG C. under a pressure of from 10 to 40 bars. The resulting aqueous methanolic solution can be reacted directly, in the conventional manner, with sulfur dioxide and aqueous sodium hydroxide solution to give sodium dithionite.