- Tytuł:
- Epoxidation of 1,5,9-cyclododecatriene with H2O2 in the presence of tungstophosphoric acid (H3PW12O40)
- Autorzy:
-
Wołosiak, A.
Lewandowski, G. - Powiązania:
- https://bibliotekanauki.pl/articles/779220.pdf
- Data publikacji:
- 2010
- Wydawca:
- Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
- Tematy:
-
kataliza przeniesienia fazowego
epoksydowanie
nadtlenk wodoru
heteropolikwasy
1,5,9-cyklododecatrina
phase-transfer catalysis
epoxidation
hydrogen peroxide
heteropoly acids
1,5,9-cyclododecatriene - Opis:
- 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.
- Źródło:
-
Polish Journal of Chemical Technology; 2010, 12, 3; 40-44
1509-8117
1899-4741 - Pojawia się w:
- Polish Journal of Chemical Technology
- Dostawca treści:
- Biblioteka Nauki
Artykuł