论文部分内容阅读
合成了5种醚基功能化酸性离子液体[Me(OEt)_1-MOR-C_3SO_3H][MeSO_3]、[Me(OEt)_2-MOR-C_3SO_3H][MeSO_3]、[Me(OEt)3_-MOR-C_3SO_3H][MeSO_3]、[2(C_3SO_3H-MOR)-(OEt)_(200)][2MeSO_3]、[2(C_3SO_3H-MOR)-(OEt)_(400)][2MeSO_3],使用红外光谱和核磁共振氢谱对合成的离子液体结构进行表征,考察离子液体的黏度、溶解性和腐蚀性。以正丁醇和乙酸的酯化反应考察了离子液体的催化活性,并使用响应面分析法优化反应工艺。结果表明,当酸醇摩尔比为1.2:1、催化剂[2(C_3SO_3H-MOR)-(OEt)_(400)][2MeSO_3]用量为醇质量的5%、带水剂用量为醇质量的16%时,在90℃下反应5 h,酯收率可达97.8%,离子液体经回收干燥重复使用8次催化活性没有明显的降低。
[Me (OEt) _1-MOR-C_3SO_3H] [MeSO_3], [Me (OEt) _2-MOR-C_3SO_3H] [MeSO_3], [Me (OEt) 3_-MOR- (OEt) _ (200)] [2MeSO_3], [2 (C_3SO_3H-MOR) - (OEt) _ (400)] [2MeSO_3] using an infrared spectrum and The structure of the synthesized ionic liquid was characterized by 1H-NMR and the viscosity, solubility and corrosivity of the ionic liquid were investigated. The catalytic activity of ionic liquids was investigated by the esterification of n-butanol and acetic acid. The response surface methodology was used to optimize the reaction process. The results showed that when the molar ratio of alcohol to alcohol was 1.2: 1, the amount of catalyst [2 (C_3SO_3H-MOR) - (OEt) _ (400)] [2MeSO_3] was 5% %, The reaction was carried out at 90 ℃ for 5 h, the yield of the ester reached 97.8%, and the ionic liquid recovered and dried for 8 times without any significant decrease in catalytic activity.