CAJ | 학술논문

研究采用1-甲基-3-丙磺酸基咪唑硫酸氢盐[ prmim][ HSO4]离子液体作为催化剂合成了异丁酸异戊酯、异丁酸丁酯,考察醇酸摩尔比、催化剂用量、反应时间对酯化率的影响,分析催化剂的重复使用效果。结果表明：当醇酸摩尔量比为1.4∶1,催化剂用量为2.0 mL,反应时间为3.5 h时,异丁酸异戊酯和异丁酸丁酯的酯化率分别达到93.07%和92.96%。生成的羧酸酯不溶于催化体系,采用分液漏斗能够实现催化剂的分离过程。离子液体循环使用6次,催化效果无明显降低。
연구채용1-갑기-3-병광산기미서류산경염[ prmim][ HSO4]리자액체작위최화제합성료이정산이무지、이정산정지,고찰순산마이비、최화제용량、반응시간대지화솔적영향,분석최화제적중복사용효과。결과표명：당순산마이량비위1.4∶1,최화제용량위2.0 mL,반응시간위3.5 h시,이정산이무지화이정산정지적지화솔분별체도93.07%화92.96%。생성적최산지불용우최화체계,채용분액루두능구실현최화제적분리과정。리자액체순배사용6차,최화효과무명현강저。
In this study,1-methyl-3-propyl sulfonic acid hydrogen sulfate imidazole salt [ prmim] [ HSO4-] ionic liquids was used as catalysts to synthesize isoamyl butyrate and butyl isobutyrate. The effect of alkyd mole rati-o,catalyst dosage and reaction time on the esterification rate was investigated and reuse performance of catalyst was also discussed. The results indicate that the esterification rates reach 93. 07% and 92. 96% when alkyd molar weight ratio is 1. 4 ∶ 1,the dosage of catalyst is 2. 0 mL and the reaction time is 3. 5 h,respectively. The generated carboxylic acid ester is not dissolved in the catalytic system,and the catalyst separation process can be realized by adopting the separatory funnel. Catalytic performance is not obviously decreased after Ionic liquid circulation was reused 6 times.