固体超强酸La^(3+)-SO_4^(2-)/TiO_2-Fe_2O_3催化合成对羟基苯甲酸丁酯

Synthesis of Butyl Paraben Catalyzed by Solid Super Acid La^(3+)-SO_4^(2-)/TiO_2-Fe_2O_3

以固体超强酸La3+-SO42-/TiO2-Fe2O3为催化剂合成了对羟基苯甲酸丁酯,考察了原料配比、催化剂用量、反应温度和反应时间等因素对产品收率的影响。试验结果表明:La3+-SO42-/TiO2-Fe2O3是合成对羟基苯甲酸丁酯的良好催化剂,当n(丁醇)/n(对羟基苯甲酸)=4.0,催化剂用量为对羟基苯甲酸质量的6%,反应温度120℃,反应时间4.0 h,对羟基苯甲酸丁酯的收率达到89.27%。

Butyl paraben was synthesized using solid super acid La^3＋-SO4^2-/TiO2-Fe2O3 as catalyst. The influence, such as ratio of raw material, amount of catalyst, reaction time, reaction temperature etc, on yield was investigated. Experimental result showed that La^3＋-SO4^2-/TiO2-Fe2O3 is an excellent catalyst. When n（n-butyl alcohol）/n（p- hydroxybenzoic acid） = 4.0, amount of La^3＋-SO4^2-/TiO2-Fe2O3 is 6.0 % （ based on acid）, reaction temperature is 120℃, and the reaction time is 4.0 h, the yield of butyl paraben can reach 89.27 %.