MgO/SnO2/WO3 as catalysts for synthesis of ε-caprolactone over oxidation of cyclohexanone with peracetic acid

• MgO/SnO2/WO3 catalysts were prepared by precipitation method.
• NH3·H2O, Na2CO3, NaHCO3, NaOH, and (NH4)2CO3 were used as precipitants.
• All metals were incorporated into the structure as confirmed by the XRD patterns.
• The Baeyer–Villiger oxidation was used to test the activity of catalysts.
• The catalyst precipitated from NH3·H2O showed the highest yield of ε-caprolactone.

Different Mg/Sn/W mixed oxides prepared by precipitation were used as catalysts in the Baeyer–Villiger oxidation of cyclohexanone with a mixture of 50% hydrogen peroxide and acetic acid as oxidant. The Mg/Sn/W oxide obtained by precipitation from NH3·H2O was found to be the catalyst providing the highest yield of ε-caprolactone and initial catalytic activity among all samples.

MgO/SnO2/WO3 catalysts which were respectively precipitated from NH3·H2O (1#), Na2CO3 (2#), NaHCO3 (3#), NaOH (4#), and (NH4)2CO3 (5#) were tested in the Baeyer–Villiger (BV) oxidation of cyclohexanone with peracetic acid, and the catalyst which precipitated from NH3·H2O showed the highest yield of ε-caprolactone of 86% and the highest conversion of cyclohexanone of 91%.Figure optionsDownload as PowerPoint slide