Homogeneous oxidative desulfurization catalyzed by a recoverable reaction-controlled phase transfer catalyst based on trilacunary Keggin polyoxometalate

2019 ◽  
Vol 43 (19) ◽  
pp. 7363-7370 ◽  
Author(s):  
Jianwei Ding ◽  
Yongqiang Zhang ◽  
Rui Wang
Keyword(s):  
Phase Transfer ◽  
Oxidative Desulfurization ◽  
Phase Transfer Catalyst ◽  
Keggin Polyoxometalate ◽  
Desulfurization Efficiency

A phosphotungstic reaction-controlled phase transfer catalyst was prepared and applied for the homogeneous oxidative desulfurization. Excellent desulfurization efficiency was achieved at 60 °C and the catalyst can be easily separated and recycled with ideal results.

scholarly journals Novel Oxidative Desulfurization of a Model Fuel with H2O2 Catalyzed by AlPMo12O40 under Phase Transfer Catalyst-Free Conditions

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Márcio José da Silva ◽  
Lidiane Faria dos Santos
Keyword(s):  
Hydrogen Peroxide ◽  
Phase Transfer ◽  
Oxidative Desulfurization ◽  
Phase Transfer Catalyst ◽  
Environmentally Benign ◽  
Aluminum Salts ◽  
Keggin Heteropolyacids ◽  
Model Fuel ◽  
Catalyzed Reactions ◽  
Short Time

A novel process was developed for oxidative desulfurization (ODS) in the absence of a phase transfer catalyst (PTC) using only Keggin heteropolyacids and their aluminum salts as catalysts. Reactions were performed in biphasic mixtures of isooctane/acetonitrile, with dibenzothiophene (DBT) as a model sulfur compound and hydrogen peroxide as the oxidant. Remarkably, only the AlPMo12O40-catalyzed reactions resulted in complete oxidation of DBT into DBT sulfone, which was totally extracted by acetonitrile, reducing the sulfur content of isooctane from the 1000 ppm to <1 ppm. Ranking of catalyst efficiency is as follows: AlPMo12O40 > H3PMo12O40 > AlPW12O40 > H3PW12O40. The absence of a PTC, acidic organic peroxides, and the use of hydrogen peroxide, an environmentally benign oxidant, make up the positive aspects of AlPMo12O40-catalyzed ODS reactions. In these reactions, high rates of DBT removal (ca. 100%) were achieved within a short time (ca. 2 hours) and under mild reaction conditions.

A micro reaction-controlled phase-transfer catalyst for oxidative desulfurization based on polyoxometalate modified silica

2013 ◽  
Vol 467 ◽  
pp. 26-32 ◽  
Author(s):  
Hongwei Zheng ◽  
Zhong Sun ◽  
XiaoLi Chen ◽  
Qian Zhao ◽  
Xiaohong Wang ◽  
...  
Keyword(s):  
Phase Transfer ◽  
Oxidative Desulfurization ◽  
Phase Transfer Catalyst ◽  
Modified Silica
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