【摘要】 制备了酸功能化离子液体(3-磺酸基)丙基三乙基铵硫酸氢盐[N(Et)3(CH2)3SO3H]HSO4,并用FT-IR、1H NMR和13C NMR对其进行了表征。将其与氯乙酸组成的复合催化体系用于催化α-蒎烯一步酯化反应,详细考察了离子液体用量、反应温度、反应时间、反应物配比等因素对酯化反应的影响,得到了较佳的反应条件:n(α-蒎烯)∶n[N(Et)3(CH2)3SO3H]HSO4∶n(氯乙酸)∶n(乙酸)5∶0.6∶5∶14,反应温度30℃,反应时间10h。在该条件下α-蒎烯转化率为95.90%,乙酸龙脑酯选择性45.07%。并对催化体系的重复使用性进行了考察,重复使用5次时,α-蒎烯转化率仍达87.4%,乙酸龙脑酯选择性40.6%。更多还原

【Abstract】 An acidic ionic liquid,namely(3-sulfonyl)propyltriethylamine hydrosulfate[HSO3-(CH2)3N(C2H5)3]HSO4 was prepared and characterized by FT-IR,1H NMR and 13C NMR.Esterification of α-pinene catalyzed over the composite catalytic system of [N(Et)3(CH2)3SO3H]HSO4-ClCH2COOH was studied.The influences of reaction factors,such as amount of acidic ionic liquid,reaction temperature,reaction time and proportion of reactants were investigated.The optimum conditions for α-pinene esterification were obtained as follows:n(α-pinene)∶n[N(Et)3(CH2)3SO3H]HSO4∶n(chloroacetic acid)∶n(acetic acid) 5∶0.6∶5∶14,reaction temperature 30 ℃,reaction time 10 h.Under the above conditions,the conversion of α-pinene was 95.90 % and the selectivity of bornyl ester was 45.07 %.The reusability of the composite catalytic system was investigated.Under the optimum conditions,when the composite catalytic system was repeatedly used for 5 times,α-pinene conversion reached 87.4 % and the selectivity of bornyl ester was 40.6 %.更多还原