公开(公告)号：US3836440A

公开(公告)日：1974-09-17

申请号：US30777672

申请日：1972-11-20

Applicant: HOECHST AG

Inventor： ALT H ,  ALT O ,  CRAMER J ,  BEYER NEE ALT G ,  CLASEN H

IPC: C07C243/22 ,  C07C67/00 ,  C07C241/00 ,  C07C241/02 ,  C25B3/04 ,  C07B29/06 ,  C07C109/04

CPC classification number: C25B3/04 ,  C07C241/02 ,  C07C243/22

Abstract: A PROCESS FOR THE MANUFACTURE OF PHENYLHYDRAZINE BY CATHODIC REDUCTION WITH SEPARATION OF CATHODE AND ANODE SPACES BY A DIAPHRAGM WHEREIN DIAZOAMINOBENZENE DISSOLVED IN AN ELECTROLYTE IS REDUCED ON SOLID ELCTRODES.

公开(公告)号：BR7805685A

公开(公告)日：1979-04-17

申请号：BR7805685

申请日：1978-08-31

Applicant: HOECHST AG

Inventor： CRAMER J

IPC: C25B3/29 ,  C25B3/23 ,  C07C43/30 ,  C25B3/02

Abstract: p-Benzoquinone-diketals of the formual I (I) in which R is H, (C1-C4)-alkyl or halogen, and R1 is (C1-C4)-alkyl, are prepared by anodic oxidation of benzene or an alkoxybenzene of the formulae in which R and R1 are as defined for formula I, in methanol containing less than about 5% by weight of water, in th presence of at least one alkali metal fluoride, ammonium fluoride and/or phosphonium fluoride as supporting electrolyte the pH being maintained below 7 by addition of HF. It is especially advantageous to carry out the anodic oxidation in a continuous-flow cell with the use of bipolar electrodes of glass-like carbon wherein the cathode surface is coated with a material reducing the hydrogen overvoltage, preferably titanium carbide.

公开(公告)号：SE7809145A

公开(公告)日：1979-03-02

申请号：SE7809145

申请日：1978-08-30

Applicant: HOECHST AG

Inventor： CRAMER J ,  LINDNER W

IPC: C25B11/02 ,  C25B3/02 ,  C25B11/00

CPC classification number: C25B11/00 ,  C25B3/02

公开(公告)号：SE7809144A

公开(公告)日：1979-03-02

申请号：SE7809144

申请日：1978-08-30

Applicant: HOECHST AG

Inventor： CRAMER J

IPC: C25B3/10 ,  C25B3/02 ,  C07C43/20

CPC classification number: C25B3/02

公开(公告)号：AU5843680A

公开(公告)日：1980-11-20

申请号：AU5843680

申请日：1980-05-15

Applicant: HOECHST AG

Inventor： MITZLAFF M ,  CRAMER J ,  PISTORIUS R

IPC: C25B3/29 ,  C25B3/23 ,  C25B3/02

Abstract: N- alpha -alkoxyethyl-carboxylic acid amides are prepared by anodic alkoxylation of N-ethyl-carboxylic acid amides with an alcohol in an electrolytic cell using vitreous carbon as anode material and at least one alkali metal and/or tetraalkyl-ammonium alkosulfate as supporting electrolyte.

公开(公告)号：SE7809145L

公开(公告)日：1979-03-02

申请号：SE7809145

申请日：1978-08-30

Applicant: HOECHST AG

Inventor： CRAMER J ,  LINDNER W

IPC: C25B3/23 ,  C25B11/00 ,  C25B11/02

Abstract: Electrochemical, especially organo-electrochemical, reactions are carried out with improved current efficiency in a continuous-flow cell with the use of bipolar electrodes placed in a frame of non-conducting material, especially a polyolefin. Preferably, the electrically active part of the electrodes consists of glass-like carbon the cathode face of which is coated with a material reducing the hydrogen overvoltage, for example titanium carbide or tungsten carbide.

公开(公告)号：BR7903636A

公开(公告)日：1980-02-05

申请号：BR7903636

申请日：1979-06-08

Applicant: HOECHST AG

Inventor： MITZLAFF M ,  PISTORIUS R ,  CRAMER J

IPC: C25B3/23 ,  C25B9/19 ,  C25B11/12 ,  C25B3/02 ,  C25B3/10

Abstract: Bipolar electrodes of graphite or glassy carbon are provided on the cathode side with metal nets of a material reducing the hydrogen overvoltage, such as nickel, copper, titanium, steel or brass and between the metal nets and the next anode a spacer made of an insulating material is inserted.

公开(公告)号：BR7805686A

公开(公告)日：1979-05-29

申请号：BR7805686

申请日：1978-08-31

Applicant: HOECHST AG

Inventor： LINDNER W ,  CRAMER J

IPC: C25B3/23 ,  C25B11/00 ,  C25B11/12 ,  C25B13/08

Abstract: Electrochemical, especially organo-electrochemical, reactions are carried out with improved current efficiency in a continuous-flow cell with the use of bipolar electrodes placed in a frame of non-conducting material, especially a polyolefin. Preferably, the electrically active part of the electrodes consists of glass-like carbon the cathode face of which is coated with a material reducing the hydrogen overvoltage, for example titanium carbide or tungsten carbide.

公开(公告)号：SE7809144L

公开(公告)日：1979-03-02

申请号：SE7809144

申请日：1978-08-30

Applicant: HOECHST AG

Inventor： CRAMER J

IPC: C25B3/29 ,  C25B3/23 ,  C07C43/20

Abstract: p-Benzoquinone-diketals of the formual I (I) in which R is H, (C1-C4)-alkyl or halogen, and R1 is (C1-C4)-alkyl, are prepared by anodic oxidation of benzene or an alkoxybenzene of the formulae in which R and R1 are as defined for formula I, in methanol containing less than about 5% by weight of water, in th presence of at least one alkali metal fluoride, ammonium fluoride and/or phosphonium fluoride as supporting electrolyte the pH being maintained below 7 by addition of HF. It is especially advantageous to carry out the anodic oxidation in a continuous-flow cell with the use of bipolar electrodes of glass-like carbon wherein the cathode surface is coated with a material reducing the hydrogen overvoltage, preferably titanium carbide.