作　　者： ; ;

机构地区： 广东石油化工学院

出　　处： 《广东化工》 2013年第3期18-19,17,共3页

摘　　要： 以酸性离子液体[Hmim]HSO4为催化剂,对羟基苯甲酸和正丙醇为原料合成了尼泊金丙酯,采用红外光谱和液相色谱-质谱对产品结构进行表征。考察了酸醇物质的量比、反应时间、反应温度、催化剂用量等对反应的影响,确定最佳反应条件为:酸醇物质的量比为1∶3、催化剂用量为反应物总质量的4%、反应时间3 h、反应温度90℃,在此条件下,尼泊金丙酯收率达91.8%。催化剂重复使用5次后,其催化活性基本不变。 With p-hydroxybenzoic acid and n-Propanol as raw materials,synthesis of propylparaben catalyzed by acidic ionic liquid [Hmim]HSO4 was researched.The structure of propylparaben was characterized by IR and LC-MS.The effects of the molar ratio of p-hydroxybenzoic acid to n-Propanol,reaction time,reaction temperature and catalyst amount on the yield of propylparaben were investigated.The optimal conditions were obtained as follows： the molar ratio of p-hydroxybenzoic acid to n-Propanol 1：3,the catalyst amount of reactant total mass 4 %,reaction time 3 h,reaction temperature 90 ℃.Under above conditions,the yield of the propylparaben reached 91.8 %.The catalytic activity of [Hmim]HSO4,was remained mostly after reused for 5 times.

关 键 词： 尼泊金丙酯 酸性离子液体 催化 合成

领　　域： [理学] [理学]