State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029 Beijing, PR China.
Chemistry. 2012 Apr 10;18(15):4775-81. doi: 10.1002/chem.201102754. Epub 2012 Feb 28.
Highly efficient, deep desulfurization of model oil containing dibenzothiophene (DBT), benzothiophene (BT), or 4,6-dimethyldibenzothiophene (4,6-DMDBT) has been achieved under mild conditions by using an extraction and catalytic oxidative desulfurization system (ECODS) in which a lanthanide-containing polyoxometalate Na(7)H(2)LnW(10)O(36)⋅32 H(2)O (LnW(10); Ln = Eu, La) acts as catalyst, [bmim]BF(4) (bmim = 1-butyl-3-methylimidazolium) as extractant, and H(2)O(2) as oxidant. Sulfur removal follows the order DBT>4,6-DMDBT>BT at 30 °C. DBT can be completely oxidized to the corresponding sulfone in 25 min under mild conditions, and the LaW(10)/[bmim]BF(4) system could be recycled for ten times with only slight decrease in activity. Thus, LaW(10) in [bmim]BF(4) is one of the most efficient systems for desulfurization using ionic liquids as extractant reported so far.
通过使用萃取和催化氧化脱硫系统（ECODS），在温和条件下实现了对含二苯并噻吩（DBT）、苯并噻吩（BT）或 4,6-二甲基二苯并噻吩（4,6-DMDBT）的模型油的高效深度脱硫。该系统中，镧系元素多金属氧酸盐 Na(7)H(2)LnW(10)O(36)⋅32 H(2)O（LnW(10)；Ln = Eu、La）作为催化剂，[bmim]BF(4)（bmim = 1-丁基-3-甲基咪唑𬭩）作为萃取剂，H(2)O(2)作为氧化剂。在 30°C 下，脱硫的顺序为 DBT>4,6-DMDBT>BT。DBT 在温和条件下 25 分钟内可完全氧化为相应的砜，LaW(10)/[bmim]BF(4)体系经过十次循环使用，活性仅略有下降。因此，在离子液体作为萃取剂的脱硫中，[bmim]BF(4)中的 LaW(10)是迄今为止报道的最有效的体系之一。
