公开(公告)号：DE19620861A1

公开(公告)日：1997-11-27

申请号：DE19620861

申请日：1996-05-23

Applicant: BASF AG

Inventor： HUBER GUENTHER DIPL ING ,  WEIPER-IDELMANN ANDREAS DR ,  KRAMER ANDREAS DR ,  GOLOMBEK ROLF DR ,  FREDE MARKUS DR ,  SPISKE LUISE DR ,  SCHEHLMANN KARL-HEINZ ,  STEUER VOLKER

IPC: C25B3/25 ,  C25B11/00 ,  C25B3/04 ,  C25B11/04 ,  C07B31/00 ,  C07C233/09 ,  C07C211/12 ,  C07C255/24 ,  C07C33/22 ,  C07C35/08 ,  C07C231/10 ,  C07C209/48 ,  C07C253/30 ,  C07C29/132

Abstract: Electrochemically reducing an organic compound comprises: contacting the compound with a cathode comprising a support of electrically conducting material and an electrically conducting, cathodically polarised layer formed on this by sedimentation in situ.

公开(公告)号：DE4327361A1

公开(公告)日：1995-02-16

申请号：DE4327361

申请日：1993-08-14

Applicant: BASF AG

Inventor： HERMELING DIETER DR ,  HANNEBAUM HEINZ ,  VOSS HARTWIG DR ,  WEIPER-IDELMANN ANDREAS DR

IPC: C07C41/50 ,  C07C43/307 ,  C25B3/23 ,  C07C43/30

Abstract: This invention is for the preparation of benzaldehyde dialkyl acetals of the general formula I in which R is C1-C6-alkyl and R is C1-C6-alkyl, C1-C6 -alkoxy, halogen, cyano or carboxyalkyl having from 1 to 6 carbon atoms in the alkyl group, and n is an integer from 1 to 3 and the radicals R , in the case of n > 1, can be identical or different, by electrochemical oxidation of substituted toluene compounds of the general formula II by oxidizing a substituted toluene compound II in the presence of an alkanol R -OH and an auxiliary electrolyte (supporting electrolyte) in an electrolytic cell, depressurising the reaction solution thus obtained, outside the electrolytic cell, to a pressure which is lower than the pressure in the electrolytic cell by from 10 mbar to 10 bar, and A) in the case of discontinuous operation, separating the gas liberated during expansion from the reaction solution, recycling the reaction solution into the electrolytic cell at least once, electrolysing, depressurising and separating from the liberated gas, and finally working up to give the product, or B) in the case of continuous operation, working up part of the reaction solution to give the product, admixing the remaining part of the reaction solution with such an amount of the originally employed reaction solution as corresponds to the part drawn off, recycling into the electrolytic cell, electrolysing and depressurising.