Catalytic oxidation-extractive desulfurization for model oil using inorganic oxysalts as oxidant and Lewis acid-organic acid mixture as catalyst and extractant

Applied Catalysis A: General, Volume 456, 10 April 2013, Pages 67–74
Catalytic oxidation-extractive desulfurization for model oil using inorganic oxysalts as oxidant and Lewis acid-organic acid mixture as catalyst and extractant
Hongyan Song a, b, Jiajun Gao a, c, Xingyu Chen a, c, Jing He a, b, Chunxi Li a, c
a State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
b Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, China
c College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Abstract
Reports investigation of the catalytic oxidation-extractive desulfurization (COEDS) performance for benzothiophene (BT-) and dibenzothiophene (DBT-) containing oils at room temperature with respect to three inorganic oxysalt oxidants, including KMnO₄, K₂Cr₂O₇, and NaClO₄ under the catalysis of an acid mixture composed of various types and amounts of Lewis acid and organic acid.
Results indicate that both KMnO₄ and K₂Cr₂O₇ are efficient oxidants. Their oxidizability can be adjusted effectively by type and tuned slightly by the amounts of the Lewis acid used.  Acetic acid is an appropriate organic acid. DBT is oxidized only to DBTO₂, while BT is converted to two to over six oxidized S-species depending on the Lewis acid used.
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