Synthesis of n-Butyl p-hydroxybenzoate Catalyzed by Super Acid La~(3+)-SO_4~(2-)/TiO_2
LI De-jiang~1, FU He-qing~2(1.Department of Chemistry, Yunyang Normal College, Hubei Danjiangkou 442700, China;2.Research Institute of Chemical Engineering, South China University of Technology, Guangdong Guangzhou 510640, China)
(1.Department of Chemistry, Yunyang Normal College, Hubei Danjiangkou 442700, China;2.Research Institute of Chemical Engineering, South China University of Technology, Guangdong Guangzhou 510640, China
Abstract A new environmentally-friendly catalyst, La~(3+)-SO_4~(2-)/TiO_2(Ⅰ) was prepared. n-Butyl p-hydroxybenzoate was synthesized from n-butyl p-hydroxybenzoic acid(Ⅱ) and n-butyl alcohol(Ⅲ) with rare earth solid super acid (Ⅰ) as catalyst. The influence, such as ratio of raw material, amount of catalyst, reaction time, etc., on yield was investigated. Experimental result showed that Ⅰ is an excellent catalyst. When n(Ⅲ)/n(Ⅱ)=4.0, amount of Ⅰ is 3.5%(based on acid), reaction temperature is 120—130 ℃, and the reaction time is 4.0 h, the yield of n-butyl p-hydroxybenzoate can reach 92.7%.
LI De-jiang~1, FU He-qing~2.Synthesis of n-Butyl p-hydroxybenzoate Catalyzed by Super Acid La~(3+)-SO_4~(2-)/TiO_2[J] Chemcial Industry and Engineering, 2005,V22(4): 259-262
2005, Vol. 22 
