氢氧化1-丁基-3-甲基咪唑的合成与表征

Study on the synthesis and characterization of hydroxide, 1-butyl-3-methyl-imidazole

以N-甲基咪唑和1-溴丁烷为原料,两步合成法合成碱性离子液体[Bmim]OH。考察了反应物摩尔比、反应温度、反应时间对碱性离子液体中间体产率的影响,碱化配比、碱化时间对碱性离子液体产率的影响。结果表明,合成碱性离子液体中间体的最佳条件为:反应温度70℃,反应时间20 h,物料比为1.2∶1,此时中间体产率最高,为92.64%;由中间体合成离子液体的最佳条件为:碱化时间为10 h,碱化配比为1.3∶1,此时碱性离子液体产率最高,为54.98%。用紫外光谱、红外光谱等对碱性离子液体的结构进行了表征和分析。

N-Methyl imidazole and 1-bromobutane as raw material, through a two-step method synthesized alkaline ionic liquid [ Bmim ] OH. And investigated the affect of the mole ratio of reactants, reaction tem- perature ,ratio alkalization ,alka[ization time to the ionic liquid intermediate and basic ionic liquid yield, give the optimum conditions of the synthesis of basic ionic liquids： the reaction temperature was 70 ℃, re- action time 20 h, the 1-bromo-butane and N-methyl imidazole in the molar ratio 1.2：1 intermediate yield of 92.64% ;alkalization time of 10 h, KOH and intermediates molar ratio of 1.3： 1, alkaline ionic liquid yield of 54.98%. Finally,made the characterization and analysis of the basic ionic liquid with ultraviolet spectroscopy, infrared spectroscopy.