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Use of Sacrificial Anodes in the Transformation of Organic Halides, Residuals from Industry

  • Marília O. F. Goulart
  • Márcia B. S. Lisboa
  • Fabiane C. de Abreu
  • Márcio H. S. Andrade
  • Josealdo Tonholo
  • Marcelo Navarro
Conference paper

Abstract

Cyclic voltammograms (CV) (DMF/TBAP 0.1M, Hg) of 2,2-dichloroethanol (DCOH) and 1,1,2-trichloroethane (TCE) showed irreversible cathodic waves related to the cleavage of C-Cl from the gem-dichlorinated group. DCOH worked as a probase, in electrolysis using aluminum sacrificial anode. In the presence of 2-butanone, dimeric alkenes, products from aldolic condensation, were obtained in large amounts. Coelectrolysis of TCE and benzophenone, in aluminum, furnished reduction products from benzophenone, without any evidence of chlorinated alcohol. CV of 2,2dichloroethylethylfumarate (DCEF) revealed the presence, at low scan rates, of two well defined reduction peaks (Epc1, Epc2) and a third one (Epc3) close to the supporting electrolyte discharge. As the scan rate increases, the first wave turns into a reversible one and a new wave, intermediate between Epc1 and Epc2 (Epci) appears. Its height (Ipci) increases as Ipc2 decreases. Epc1 dependence with scan rate suggests an EC process, related to the reduction of the olefin, followed by dimerization. The remaining cathodic waves showed to be irreversible and the last one is related to C-Cl cleavage. Electrohydrodimerization is the main process in electrolyses of DCEF.

Keywords

Cyclic Voltammograms Aldolic Condensation Vitreous Carbon Sacrificial Anode Undivided Cell 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1).
    S. Pellegrini; J.C. Folest; J.Y. Nédélec; J. Perichon, J. Electroanal. Chem. 1989, 266, 349.CrossRefGoogle Scholar

Copyright information

© Springer Japan 1998

Authors and Affiliations

  • Marília O. F. Goulart
    • 1
  • Márcia B. S. Lisboa
    • 1
  • Fabiane C. de Abreu
    • 1
  • Márcio H. S. Andrade
    • 1
  • Josealdo Tonholo
    • 1
  • Marcelo Navarro
    • 1
  1. 1.Departamento de Química, CCENUniversidade Federal de AlagoasMaceióBrazil

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