Epoxidation of 1,5,9-cyclododecatriene with H2O2 in the presence of tungstophosphoric acid (H3PW12O40)

• Authors: Agnieszka Wołosiak , Grzegorz Lewandowski
• Languages of publication: EN

Abstracts

EN

The influence of the technological parameters on the epoxidation of 1,5,9-cyclododecatriene (CDT) to 1,2-epoxy-5,9-cyclododecadiene (ECDD) by the phase-transfer catalysis method (PTC) in the presence of tungstophosphoric heteropolyacid (H3PW12O40) and hydrogen peroxide as the oxidizing agent has been presented. The phase-transfer catalyst was Aliquat® 336 (methyltrioctylammonium chloride). The epoxidation of CDT to ECDD in the PTC system proceed under the relatively mild condition: low temperature, lack of solvent, short reaction time.The effect of: the mixing velocity, the molar ratio of CDT:H2O2 and H2O2:H3PW12O40, the nature of the solvent and its concentration, was studied. The most advantageous technological parameters were: the mixing rate 400 - 600 rpm, the molar ratio of CDT:H2O2 = 3:1 - 1.5:1, the molar ratio of H2O2:H3PW12O40 = 200:1 - 400:1, the temperature 40 - 50°C, solvent: dichloromethane or lack of the solvent, dichloromethane concentration: 10 - 50 vol%, reaction time 35 - 50 min. The application of the above-mentioned parameters allows to achieve the yield of 44 - 47% ECDD in relation to introduced CDT.

Keywords

EN

phase-transfer catalysis; epoxidation; hydrogen peroxide; heteropolyacids; 1,5,9-cyclododecatriene

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2010
• Volume: 12
• Issue: 3
• Pages: 40-44

Dates

published

1 - 1 - 2010

online

27 - 9 - 2010

Contributors

author

Agnieszka Wołosiak

• Institute of Chemical Organic Technology, West Pomeranian University of Technology, ul. Pułaskiego 10, 70-322 Szczecin, Poland

author

Grzegorz Lewandowski

• Institute of Chemical Organic Technology, West Pomeranian University of Technology, ul. Pułaskiego 10, 70-322 Szczecin, Poland

References

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Identifiers

DOI

10.2478/v10026-010-0032-z