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Citation: ZHU Wenshuai, WU Peiwen, SHI Hua, LI Huaming, HUANG Weihong, YAN Yongsheng, WANG Zhigao. Esterification of Salicylic Acid Using Acidic Ionic Liquid as Catalyst under Microwave Irradiation[J]. Chinese Journal of Applied Chemistry, ;2011, 28(9): 1096-1098. doi: 10.3724/SP.J.1095.2011.00533 shu

Esterification of Salicylic Acid Using Acidic Ionic Liquid as Catalyst under Microwave Irradiation

1.
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013

Corresponding author: LI Huaming,
Received Date: 14 September 2010
Available Online: 8 November 2010
Fund Project: 国家自然科学基金(20876071,21076099) (20876071,21076099)镇江市工业攻关(GY2007010) (GY2007010)中国博士后基金(201003556) (201003556)江苏省博士后基金(1001025C) (1001025C)江苏大学高级人才启动基金(09JDG063)资助项目 (09JDG063)

A acidic ionic liquid[MIMPS]HSO₄ was synthesized and used for the esterification of salicylic acid. Factors including reaction temperature, reaction time, ratio of reactant and amount of ionic liquid were investigated. It was found that the optimized conditions were at 95℃, microwave irradiation for 20 min, molar ratio of methanol to salicylic acid with 3:1, amount of [MIMPS]HSO₄ 10 mmol. The yield and selectivity of methyl salicylate were 91.9% and 99.0%, respectively.[MIMPS][HSO₄] as a catalyst can be recycled for 4-times without obvious decrease in activity. Microwave irradiation could reduce reaction time under the same conditions. The yield of esterification decreased as the carbon chain increases, and also when the secondary alcohols were used instead of the primary alcohols.
- microwave,
- acidic ionic liquids,
- esterification,
- methyl salicylate
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