Rare-earth compound solid superacid SO4^2 -/TiO2/La3＋ was prepared. Its catalytic activity was examined under different synthetic conditions for the esterification of propanoic acid and n-butyl alcohol as probing rea...Rare-earth compound solid superacid SO4^2 -/TiO2/La3＋ was prepared. Its catalytic activity was examined under different synthetic conditions for the esterification of propanoic acid and n-butyl alcohol as probing reaction. The optimum conditions were also found, which were the pH=8, the depositing time was 24 h, the mass fraction of La（NO3）3 used in solid superacid was 5%, the concentration of H2SO4 was 1.25 mol/L, the soaking time in H2SO4 was 16 h and the calcining temperature was 500℃. The ethyl oleate was synthesized from oleic acid and ethanol in the presence of SO4^2-/TiO2/La3＋. The optimum reaction conditions were obtained which were the reaction time was 6 h, molar ratio of oleic acid to ethanol was 1：4 and the mass fraction of catalyst was 4%.展开更多
基金Supported by the National Scientific Research Innovation Foundation in Harbin Institute of Technolgy,China(No.HIT.NSRIF.2009081)the Program of Harbin Subject Chief Scientist,China(No.2009RFXXN047)the Program of Excellent Team in HIT,China
文摘Rare-earth compound solid superacid SO4^2 -/TiO2/La3＋ was prepared. Its catalytic activity was examined under different synthetic conditions for the esterification of propanoic acid and n-butyl alcohol as probing reaction. The optimum conditions were also found, which were the pH=8, the depositing time was 24 h, the mass fraction of La（NO3）3 used in solid superacid was 5%, the concentration of H2SO4 was 1.25 mol/L, the soaking time in H2SO4 was 16 h and the calcining temperature was 500℃. The ethyl oleate was synthesized from oleic acid and ethanol in the presence of SO4^2-/TiO2/La3＋. The optimum reaction conditions were obtained which were the reaction time was 6 h, molar ratio of oleic acid to ethanol was 1：4 and the mass fraction of catalyst was 4%.
