Chiang Mai Journal of Science

PEG1000 –DAIL Enhanced Catalysis Activity: Oxidation of Ethylbenzene and its Derivatives by N-Hydroxyphthalimide and Oxime in 1000-Based Dicationic Acidic Ionic Liquid

Paper Type	Contributed Paper
Title	PEG1000 –DAIL Enhanced Catalysis Activity: Oxidation of Ethylbenzene and its Derivatives by N-Hydroxyphthalimide and Oxime in 1000-Based Dicationic Acidic Ionic Liquid
Author	Yuhang Wang*[a], Tingting Lu[b]
Email	sanbaoyisheng@126.com
Abstract:  N-Hydroxyphthalimide (NHPI)-oxime (DMG) catalyst system had better performance in the PEG 1000 -based functional dicationic acidic ionic liquid (PEG1000 -DAIL) than in the conventional organic solvents for the aerobic oxidation of ethylbenzene and its derivatives. PEG1000 -DAIL enhanced the catalytic ability of NHPI: 91.9% conversion of ethylbenzene with 84.8% selectivity for acetophenone could be obtained in 7 h, and 92.1% ethylbenzene was oxidized to benzoic acid with 89.3% selectivity in 12 h. Ethylbenzenes with electron-rich groups were oxidized to different products when time was changed, but the main product was only ketone when electron-withdrawing ethylbenzene was employed. Both the catalyst and PEG1000 -DAIL could be reused at least six times without significantly decreasing the catalytic activity.
Start & End Page	138 - 147
Received Date	2012-08-30
Revised Date
Accepted Date	2013-04-10
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Volume	Vol.41 No.1 (JANUARY 2014)
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