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

• Autorzy: Wołosiak A. , Lewandowski G.
• Języki publikacji: EN

Abstrakty

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 AliquatŽ 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.

Słowa kluczowe

EN

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

PL

kataliza przeniesienia fazowego; epoksydowanie; nadtlenk wodoru; heteropolikwasy; 1,5,9-cyklododecatrina

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2010
• Tom: Vol. 12, nr 3
• Strony: 40--44
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Wołosiak A.

autor

Lewandowski G.

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

Bibliografia

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