固体超强酸SO_4^(2-)/TiO_2-凹凸棒土催化合成尼泊金乙酯的研究  

Study on the synthesis of ethylparaben with solid superacid SO_4^(2-)/TiO_2-attapulgite as catalyst

作　　者：钱运华[1] 金叶玲[1] 陈静[1] 胡涛[1] 谭立强[1] 

机构地区：[1]淮阴工学院化工系,淮安223003

出　　处：《食品科技》2007年第12期147-149,共3页Food Science and Technology

基　　金：淮安市工业项目(HAG04013);江苏省科技攻关项目(BE2004387)

摘　　要：研究了以固体超强酸SO42-/TiO2-凹凸棒土为催化剂,对羟基苯甲酸和乙醇为原料合成尼泊金乙酯,并考察影响反应的因素。结果表明:酸醇摩尔比为1∶4、催化剂用量为3%、反应时间4h是最佳的反应条件,产品收率达93.2%。该催化剂与单组分固体超强酸SO42-/TiO2相比,具有成本较低,与产物易分离、可重复使用、不污染环境等优点,是对环境友好并具有应用前景的绿色催化剂。The synthesis of ethylparaben with p-hydroxy benzoic acid and ethanol as reactants and solid superacid SO4^2 -/TiO2- attapulgite as catalyst were studied. The influencing factors on reaction were investigated. The results showed that the best appropriate conditions should be： the moal ratio of acid to alcohol was 1：4,the weight of catalyst was 3% and the reaction time 4h. The yield of ethylparaben was about 93.2%. Comparied with unfixed solid superacid SO4^2-/TiO2, this complex catalyst was lower cost, easy to separate, and could be applied repeatedly. The catalyst was an environment-friendly green catalyst with great-applied value in the future.

关 键 词：固体超强酸 催化剂 尼泊金乙酯 酯化反应 

分 类 号：TS201.2[轻工技术与工程—食品科学]