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投稿时间：2021-08-25
投稿时间：2021-08-25
中文摘要: 该文合成并表征4种具有Br?nsted-Lewis酸位点的吡咯烷酮鎓类离子液体，并以合成的离子液体为催化剂催化合成水杨酸正丁酯，利用响应面法优化得到最佳合成工艺。结果表明，最优条件为反应时间3 h、反应温度90℃、水杨酸与正丁醇摩尔质量比1∶3，以[C3SO3H-Hnmp]HSO4为催化剂，酯化率高达88.4%，且催化剂循环使用8次，仍未观察到明显的活性下降。
Abstract:Four pyrrolidinium ionic liquids with Br?nsted-Lewis acid sites were synthesized and characterized.The synthesized ionic liquids were used as catalysts to prepare n-butyl salicylate.The results showed that the optimum conditions were as follows：time for 3 h，temperature at 90℃，and molar ratio of acid to alcohol of 1∶3.With[C3SO3H-Hnmp]HSO4as catalyst，the esterification rate was as high as 88.6%，and no obvious decrease in activity was observed when the catalyst was recycled for eight times.
keywords: n-butyl salicylate food additives ionic liquids catalytic activity response surface methodology esterification
文章编号：202217011 中图分类号： 文献标志码：
基金项目:国家自然科学基金项目（21862023）
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