氯球固载化离子液体的制备及其在乙酸异戊酯合成中的应用  

Synthesis of Supported Ionic Liquids With Chloromethyl Polystyrene and Its Application on Esterification for Isoamyl Acetate

作　　者：郑好英 杜慷慨[1] ZHENG Haoying;DU Kangkai(College of Material Science and Engineering, Huaqiao University, Xiamen 361021, China)

机构地区：[1]华侨大学材料科学与工程学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2017年第6期824-829,共6页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(21246008);福建省科技计划重点资助项目(2013H0027);福建省自然科学基金资助项目(2016J01060)

摘　　要：以氯球为载体,合成3种固载化离子液体[PS-Im-C3H6SO3H][HSO4],[PS-Im-C3H6SO3H][Cl]和[PS-Im-C3H6SO3H][Br];然后,以这3种固载化离子液体作为催化剂,以乙酸和异戊醇为原料,催化合成乙酸异戊酯.在具有最好催化性能的[PS-Im-C3H6SO3H][Cl]的催化作用下,进一步探讨反应温度、催化剂用量、酸醇的量比和反应时间对酯化产率的影响.结果表明:以[PS-Im-C3H6SO3H][Cl]为催化剂,酸醇的量比为2∶1,催化剂用量为酸醇总量的2.5%,反应温度为115℃,反应时间为2h的优化条件下,乙酸异戊酯的产率最高可达96.8%,且催化剂重复使用6次后仍能保持较高的产率,稳定性较好.Three supported ionic liquids,including[PS-Im-C3H6SO3H][HSO4],[PS-Im-C3H6SO3H][Cl]and[PS-Im-C3H6SO3H][Br],were synthesized with chloromethyl polystyrene.Then,isoamyl acetate was synthesized using these three supported ionic liquids as catalyst and acetic acid and isoamyl alcohol as raw materials.Among them,[PS-Im-C3H6SO3H][Cl]performed the best catalyst performance and was chosen for further study.The effects of reaction temperature,the dosage of catalyst,the molar ratio of acetic acid to isoamyl alcohol,and the reaction time on the yield were discussed.The results showed that the optimum conditions were:molar ratio of acetic acid to isoamyl alcohol was2∶1,the quantity of catalyst was2.5%of the total mass of reactants,the reaction temperature was115℃,and the reaction time was2h.Under these conditions,[PS-Im-C3H6SO3H][Cl]presented excellent catalyst efficacy and stability for synthesizing isoamyl acetate with the yield 96.8%,and the yield could still keep in a high value after reusing six times.

关 键 词：固载化离子液体 乙酸异戊酯 催化性能 酯化产率 

分 类 号：TQ426[化学工程]