Oxidation of Cyclohexane to Cylohexanol and Cyclohexanone Over H₄[a-SiW₁₂O₄₀]/TiO₂ Catalyst

• Main Authors: Aldes Lesbani, Fatmawati Fatmawati, Risfidian Mohadi, Najma Annuria Fithri, Dedi Rohendi
• Format: Article
• Language: English
• Published: Universitas Gadjah Mada 2016-08-01
• Series: Indonesian Journal of Chemistry
• Subjects: cyclohexane; cyclohexanol; cyclohexanone; oxidation; H4[a-SiW12O40]/TiO2
• Online Access: https://jurnal.ugm.ac.id/ijc/article/view/21161
• ISSN: 1411-9420; 2460-1578

Oxidation of cyclohexane to cyclohexanol and cyclohexanone was carried out using H4[a-SiW12O40]/TiO2 as catalyst. In the first experiment, catalyst H4[a-SiW12O40]/TiO2 was synthesized and characterized using FTIR spectroscopy and X-Ray analysis. In the second experiment, catalyst H4[a-SiW12O40]/TiO2 was applied for conversion of cyclohexane. The conversion of cyclohexane was monitored using GC and GCMS. The results showed that H4[a-SiW12O40]/TiO2 was successfully synthesized using 1 g of H4[a-SiW12O40] and 0.5 g of TiO2. The FTIR spectrum showed vibration of H4[a-SiW12O40] appeared at 771-979 cm-1 and TiO2 at 520-680 cm-1. The XRD powder pattern analysis indicated that crystallinity of catalyst still remained after impregnation to form H4[a-SiW12O40]/TiO2. The H4[a-SiW12O40]/TiO2 catalyst was used for oxidation of cyclohexane in heterogeneous system under mild condition at 2 h, 70 °C, 0.038 g catalyst, and 3 mL hydrogen peroxide to give cyclohexanone as major product.