作　　者： (马滨）; (袁冰）;

机构地区： 青岛科技大学化学与分子工程学院

出　　处： 《青岛科技大学学报（自然科学版）》 2017年第S1期25-29,34,共6页

摘　　要： 设计合成了一系列烷基咪唑羧基功能化离子液体,采用FT-IR,~1 H NMR表征了其结构,采用正丁胺/乙腈电位滴定法分析其酸强度。该类羧基功能化离子液体在α-蒎烯的水油两相酸催化反应中表现出了较高的催化活性,考查了羧基个数、引入卤素等因素对催化性能的影响。结果表明,羧基及卤素基团的引入提高了水合产物的选择性。在催化剂[N-C_(14),N′-(CO_2H)_2-C_2H_2-Im-Br]_2HPW_(12)O_(40)用量0.25 mmol,水用量0.30mol,α-蒎烯用量0.06mol,80℃反应8h的条件下,α-蒎烯转化率达98.2%,α-松油醇的选择性为21.6%,水合产物的总选择性达33.9%。 A series of CFILs(carboxyl functionalized ionic liquids)had been synthesized via a conventional method.The CFILs catalysts has been applied to the hydration/isomerization ofα-pinene and exhibited good catalytic activity.The CFIL of[N-C_(14),N′-(CO_2H)_2-C_2H_2-ImBr]_2 HPW was characterized by ~1 HNMR and FT-IR.And the productions of hydration/isomerization were analyzed via GC-MS and GC.The results indicated that introduction of carboxyl groups had enhanced the selectivity forα-terpineol and halogen group had improved the conversion to a certain extent.Furthermore,the catalyst of[N-C_(14),N′-(CO_2H)_2-C_2H_2-ImBr]_2HPW_(12)O--_(40)performed the best catalytic effect among these CFILs.Under the optimum reaction conditions that the dosage of catalyst is 0.25 mmol,the dosage of water is 0.30 mol,the amount ofα-pinene is 0.06 mol,the temperature is 80 ℃ and the reaction time is 8h,the conversion ofα-pinene was 98.2%,and the selectivity forα-terpineol was 21.6%.

关 键 词： 羧基功能化离子液体 蒎烯 水合 异构