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A. V. Akopyan, E. A. Eseva, P. D. Polikarpova, A. A. Kedalo, A. V. Anisimov
Catalysts based on immobilized ionic liquids
with bronsted acid cites in the dibenzothiophene oxidation reaction
Abstract
Immobilized ionic liquids
with Bronsted acidity containing fragments of nicotinic and phosphoromolybdic
acids were synthesized by two methods: suspension impregnation and chemical
immobilization. The obtained catalysts were characterized by low-temperature adsorption
/ desorption of nitrogen, elemental analysis, and transmission electron
microscopy. The conditions for the dibenzothiophene exhaustive oxidation were
found: 30 min, the molar ratio of hydrogen
peroxide: dibenzothiophene was 6: 1, catalyst amount 0.5% weight, 80 °C. The
catalysts obtained by the impregnation method lose their activity after
regeneration, and the catalysts obtained by the chemical immobilization method
retain their activity after at least 5 oxidation-regeneration cycles.
Key words: oxidative desulfurization,
immobilized ionic liquids, dibenzothiophene, hydrogen peroxide, phosphomolybdic
acid.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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