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- W2350579119 abstract "Acidic ionic liquid was used,instead of sulfuric acid,to catalyze the Bamberg rearrangement reaction in hydrogenation of nitrobenzene to p-aminophenol.A novel quaternary ammonium type of acidic ionic liquid N,N,N-trimethyl-N-sulfobutyl hydrogen sulfate,[HSO3-b-N(CH3)3]HSO4,containing —SO3H was synthesized,and its acidity and catalytic activity were investigated,compared to that of the ionic liquids,such as 1-sulfobutyl-3-methylimidazolium hydrogen sulfate([SO3H-bmim]HSO4),N,N-diethyl hydrogen sulfate([(CH3CH2)2NH2]HSO4) and N,N,N-trimethyl hydrogen sulfate([(CH3)3NH]HSO4).Supported ionic liquid catalyst [HSO3-b-N(CH3)3]HSO4/SiO2 was prepared through sol-gel process to reduce the dosage of [HSO3-b-N(CH3)3]HSO4 in Bamberg rearrangement reaction and to make the catalyst be recovered easily.The evaluation results showed that the phenylhydroxylamine conversion and p-aminophenol selectivity were,respectively,100% and 60.5% at conditions of 85℃,30 min and the molar ratio of ionic liquid to phenylhydroxylamine of 0.5." @default.
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- W2350579119 date "2009-10-25" @default.
- W2350579119 modified "2023-09-24" @default.
- W2350579119 title "SYNTHESIS OF p-AMINOPHENOL BY BAMBERG REARRANGEMENT OF PHENYLHYDROXYLAMINE OVER [HSO_3-b-N(CH_3)_3]HSO_4/SiO_2 CATALYST" @default.
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