SO_3H-功能化酸性离子液体催化合成异戊酸异戊酯  

Catalytic Synthesis of Isoamyl Isovalerate by SO_3H-functionalized Acidic Ionic Liquids as Catalysts

作　　者：宋乐莲 杜欢 谈忠琴 韩晓祥 励建荣[2] 

机构地区：[1]浙江工商大学应用化学系,杭州310035 [2]渤海大学辽宁省食品安全重点实验室,辽宁锦州121013

出　　处：《中国食品学报》2016年第1期130-138,共9页Journal of Chinese Institute Of Food Science and Technology

摘　　要：以SO_3H-功能化离子液体为催化剂,以异戊酸和异戊醇为原料,考察醇酸物质的量比、催化剂用量、带水剂用量及不同反应时间对酯化反应的影响,并通过响应面分析法优化反应工艺。试验结果表明,离子液体[(CH_3CH_2)_3N(CH_2)_3SO_3H]HSO_4具有最好的催化活性;优化后异戊酸异戊酯最佳反应条件为:n(异戊醇):n(异戊酸)=1.8,离子液体剂量6%,反应时间1.5 h,带水剂环己烷量10 m L,此反应条件下,异戊酸异戊酯的酯化率为97.2%,与模型预测值基本相符。Isoamyl isovalerate is synthesized from isoamyl alcohol and isopentanoic acid with SO_3H- functionalized acidic ionic liquids as catalysts. The effects of alcohol/acid molar ratio, the amount of catalyst, the amount of water carrying agent and reaction time are also investigated. Meanwhile, the optimum operation conditions are obtained by response surface methodology（RSM）. [（CH3CH2）3N（CH2）3SO3H]HSO4ionic liquid shows the best catalytic activity on the esterification of isoamyl alcohol with isopentanoic acid. The optimum conditions are as follows ： n（isoamyl alcohol）：n（isopentanoic acid）=1.8∶1, the amount of catalyst of 6% to acid, the amount of water carrying agent 10 mL and reaction time 1.5 h. Under the optimized conditions, the yield of isoamyl isovalerate reached 97.2%, in close agreement with values predicted by the mathematical model（97.7%）.

关 键 词：酯化反应 离子液体 异戊酸异戊酯 响应面法 

分 类 号：TQ225.24[化学工程—有机化工]