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Highly Efficient Extraction and Oxidative Desulfurization System Using Na 7 H 2 LaW 10 O 36 ⋅32 H 2 O in [bmim]BF 4 at Room Temperature
Author(s) -
Xu Junhua,
Zhao Shen,
Chen Wei,
Wang Miao,
Song YuFei
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201102754
Subject(s) - dibenzothiophene , flue gas desulfurization , benzothiophene , ionic liquid , chemistry , polyoxometalate , catalysis , sulfur , extraction (chemistry) , oxidative phosphorylation , medicinal chemistry , sulfone , lanthanide , nuclear chemistry , inorganic chemistry , organic chemistry , ion , thiophene , biochemistry
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.