Deep oxidative desulfurization of benzothiophene and dibenzothiophene with a peroxophosphotungstate–ionic liquid brush assembly |
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| Authors: | Xian‐Ying Shi Man Sun Juan Fan Peng‐Min Wang Wen‐Juan Ma Jun‐Fa Wei |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, China;2. Key Laboratory for Macromolecular Science of Shaanxi Province, Xi'an, China |
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| Abstract: | A novel, efficient and reusable heterogeneous catalytic assembly of peroxophosphotungstate held in an ionic liquid brush was synthesized and an extraction and catalytic oxidative desulfurization (ECODS) procedure was developed for a model oil of benzothiophene (BT) and dibenzothiophene (DBT) using 30 wt% hydrogen peroxide as terminal oxidant and methanol as solvent under mild conditions. Several factors that affect sulfur removal were investigated in detail. The highest sulfur removal can reach 100% for BT in 7 h at 70 °C when the molar ratio of H2O2, S and catalyst is 10:1:0.025. The sulfur removal for DBT can also reach 100% in 4 h at 50 °C with the same molar ratio of H2O2, S and catalyst. The experimental results demonstrate that this ECODS process has no apparent scale‐up effect. The catalyst can be easily recovered (via simple filtration) and recycled five times without a significant decrease in activity. Copyright © 2015 John Wiley & Sons, Ltd. |
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| Keywords: | oxidative desulfurization heterogeneous catalysis benzothiophene dibenzothiophene ionic liquid brush |
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