Catalysis Letters

, Volume 37, Issue 1–2, pp 89–94 | Cite as

The influence of zinc ions discharged in a non-aqueous cell on a copper catalyst on the rate of cyclohexanol dehydrogenation reaction

  • Andrzej Stokiosa
  • Janusz ZajÇcki
  • Grzegorz Wilczyński
  • Anna Wójtowicz
  • Stefan S. Kurek
Article
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Abstract

Results of studies on the influence of a copper catalyst modification with zinc ions on the activity in the reaction of cyclohexanol dehydrogenation are presented. The modification has been performed by electrochemical discharging-insertion of zinc ions on a copper electrode in a non-aqueous cell. It has been demonstrated that the catalyst activity depends on the amount of discharged zinc ions as well as on the nature and concentration of the electrolyte. In the case of zinc ions discharged from a solution of ZnCl2 in propylene carbonate, the yield of cyclohexanone increased up to five times and using Zn(BF4)2 in dimethylformamide almost twenty times. The activity of the system in the competing reaction of dehydration was low, hence the selectivity in the dehydrogenation reaction was high.

Keywords

zinc/copper catalyst cyclohexanol dehydrogenation zinc electrochemical discharging on copper 
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Copyright information

© J.C. Baltzer AG, Science Publishers 1996

Authors and Affiliations

  • Andrzej Stokiosa
    • 1
  • Janusz ZajÇcki
    • 1
  • Grzegorz Wilczyński
    • 1
  • Anna Wójtowicz
    • 1
  • Stefan S. Kurek
    • 1
  1. 1.Institute of Chemical Engineering and Physical ChemistryCracow University of TechnologyKrakowPoland

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