Deep oxidative desulfurization of benzothiophene and dibenzothiophene with a peroxophosphotungstate-ionic liquid brush assembly

作者：Shi, Xian-Ying^*; Sun, Man; Fan, Juan; Wang, Peng-Min; Ma, Wen-Juan; Wei, Jun-Fa

来源：Applied Organometallic Chemistry, 2015, 29(9): 633-637.

DOI：10.1002/aoc.3344

• oxidative desulfurization
• heterogeneous catalysis
• benzothiophene
• dibenzothiophene
• ionic liquid brush

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 30wt% 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 7h at 70 degrees 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 4h at 50 degrees 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.

• 出版日期2015-9
• 单位陕西师范大学