Chen Yang, Song Yu-Fei
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029 (P. R. China), Fax: (+86) 10-64431832.
Chempluschem. 2014 Feb;79(2):304-309. doi: 10.1002/cplu.201300323. Epub 2013 Nov 29.
The polyoxometalate (POM) cluster Na H LaW O ⋅32 H O (denoted LaW ) is immobilized onto dihydroimidazolium-based ionic-liquid (IL)-modified mesoporous silica, resulting in the formation of a new catalyst: LaW /IL-SiO . Compared with other reported extractive catalytic oxidative desulfurization (ECODS) systems, LaW /IL-SiO has the following advantages: 1) the heterogeneous catalyst LaW /IL-SiO achieves deep desulfurization of dibenzothiophene (DBT), benzothiophene (BT), and 4,6-dimethyldibenzothiophene (4,6-DMDBT) in 25, 30, and 25 min, respectively, under mild conditions; 2) deep desulfurization of DBT follows zero-order reaction kinetics; 3) there is no need to add ionic liquid each time the catalyst is reused; 4) the catalyst can be separated easily by filtration and reused at least ten times without a decrease in catalytic efficiency. As such, LaW /IL-SiO shows great potential for practical applications.
多金属氧酸盐（POM）簇合物NaHLaW O·32H O（记为LaW）被固定在基于二氢咪唑鎓的离子液体（IL）修饰的介孔二氧化硅上，从而形成一种新型催化剂：LaW/IL-SiO。与其他已报道的萃取催化氧化脱硫（ECODS）体系相比，LaW/IL-SiO具有以下优点：1）非均相催化剂LaW/IL-SiO在温和条件下分别于25、30和25分钟内实现了二苯并噻吩（DBT）、苯并噻吩（BT）和4,6-二甲基二苯并噻吩（4,6-DMDBT）的深度脱硫；2）DBT的深度脱硫遵循零级反应动力学；3）每次催化剂重复使用时无需添加离子液体；4）催化剂可通过过滤轻松分离，且至少可重复使用十次而催化效率不降低。因此，LaW/IL-SiO在实际应用中显示出巨大潜力。
