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

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,江苏淮安223003

出　　处：《食品工业科技》2007年第11期189-191,共3页Science and Technology of Food Industry

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

摘　　要：以对羟基苯甲酸和丙醇为原料,用固体超强酸SO_4^(2-)/TiO_2--凹凸棒土作为催化剂,合成尼泊金丙酯,并用正交实验确定了反应的最佳条件:酸醇摩尔比为1∶4,催化剂用量为3%,反应时间4h,产品收率达93.1%。该催化剂与单组分固体超强酸SO_4^(2-)/TiO_2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。Propylparaben was synthesized from p- hydroxy benzoic acid and propanol using solid superacid SO4^2-/TiO2- attapulgite as catalyst. The optimum reaction conditions were selected as follows： moal ratio of acid to alcohol was 1：4 ,weight of catalyst was 3% and reaction time 4h. The highest yield of propylester was 93.1% . Comparied with unfixed nanosolid superacid SO4^2-/TiO2, this complex catalyst was lower cost, easy to separate, and could be applied repeatedly. The catalyst is an environment- friendly green catalyst with great applied value in the future.

关 键 词：固体超强酸 催化剂 尼泊金丙酯 酯化反应 

分 类 号：TS202.3[轻工技术与工程—食品科学]