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Citation: SUN Xiaoyun, LI Jing, YUE Shuang, DU Yanfang, ZANG Shuliang. Methyltri-n-octylammonium Peroxotungstate Ionic Liquid Catalized Hydrogen Peroxide Oxidation of Benzyl Alcohol to Benzoic Acid[J]. Chinese Journal of Applied Chemistry, ;2013, 30(4): 394-397. doi: 10.3724/SP.J.1095.2013.20309 shu

Methyltri-n-octylammonium Peroxotungstate Ionic Liquid Catalized Hydrogen Peroxide Oxidation of Benzyl Alcohol to Benzoic Acid

SUN Xiaoyun ^a,b,c, ,
LI Jing ^c ,
YUE Shuang ^c ,
DU Yanfang ^c ,
ZANG Shuliang ^c

a. Department of Chemistry, East China Normal University, Shanghai 200062, China;
b. College of Science, Shenyang Aerospace University, Shenyang 110136, China;
c. Institute of Rare and Scattered Elements Chemistry, Liaoning University, Shenyang 110036, China

Received Date: 12 July 2012
Revised Date: 16 October 2012

An ionic liquid methyltri-n-octylammonium peroxotungstate[(CH₃)N(n-C₈H₁₇)₃]₂W₂O₁₁ was synthesized via an one-step process using methyl trioctyl ammonium chloride[(CH₃)N(n-C₈H₁₇)₃]Cl and sodium tungstate as precursors.The oxidation of benzyl alcohol to benzoic acid by H₂O₂ was studied using the obtained ionic liquid as catalyst under solvent-free condition.The optimized reaction conditions are:the amount of benzyl alcohol substrate is 5.0 mmol,the molar fraction of ionic liquid catalyst to the substrate is 0.4%,the amount of hydrogen peroxide is 20.0 mmol and the reaction temperature is 70℃.Under these optimized conditions,the conversion of benzyl alcohol can reach 99% while the selectivity is over 98%.The advantages of this reaction include solvent free,mild reaction conditions,high yield and selectivity of target product.
- ionic liquid,
- benzyl alcohol,
- benzoic acid,
- oxidation
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