Abstract
The synthesis of methyl ethyl ketone peroxide (MEKP) generally belongs to the homogeneous strong acid catalysed process. Acid is corrosive to the equipment, cannot be reused and thus has a large amount of wastewater to be post-treated and needs high treatment cost. The heterogeneous catalytic synthesis of organic peroxides is gaining more and more attention. In this study, methyl ethyl ketone peroxide was prepared from butanone oxidized by hydrogen peroxide and in the presence of UiO-66 as the catalyst. Under the conditions that the molar ratio of H2O2 to methyl ethyl ketone (MEK) is 2, the mass ratio of UiO-66 to MEK is 0.045, the reaction temperature is 30 °C, and the reaction time is 70 min, the active oxygen content of the product reaches 10.81 %, and the main products are methyl ethyl ketone peroxide and its oligomers. The thermal decomposition heat and activated energy are 748 J·g−1 and 101 kJ·mol−1 based on the thermogravimetric-differential scanning calorimetry (TG-DSC) determination. Finally, after four cycles, uio-66 still had 70.2 % yield, and XRD and FTIR after the cycles proved the good stability of the catalyst. The study provides a new way for the production of methyl ethyl ketone peroxide by heterogeneous catalytic oxidation.
Published Version
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