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Electrosynthèse organique en continu. Méthodes directes et indirectes

1994 Journal de Physique IV : Proceedings  
Time scale is an important parameter in organic electrosynthesis, particularly when chemical reactions occur during electrochemical processes. Because a long time is necessary to reach good yields with cells using planar electrodes, we studied electrolysis cells with porous electrodes of high specific area (graphite felt). A disposition with two or three electrical circuits provides a good distribution of working potential and, consequently, a good selectivity of electrochemical processes.
more » ... cal processes. Cells can be adapted with only one porous electrode to realize an oxidation or a reduction or, with two closely consecutive porous electrodes of opposite polarities ("redox" flow cell) to do a reduction then an oxidation or vice versa. Direct large-scale preparations at one or two porous electrodes of various organic compounds are achieved with good yields (> 90-95%). Particularly unstables species can be obtained. Another application of the ce11 with one porous electrode concerns indirect electrolysis. The indirect electrolytic process emploies a water soluble redox reagent which is continuously recycled and the chemical reaction which occurs out of the cell, is a two-phase process. Article published online by EDP Sciences and available at http://dx.
doi:10.1051/jp4:1994113 fatcat:maf6elq5dbbcjgdv53gzmw4z5q