固体超强酸SO2－4/TiO2/La3+催化合成二甲基丙烯酸丁二醇酯

以自制稀土改性固体超强酸SO^2－₄/TiO₂/La³⁺为催化剂，高效合成了二甲基丙烯酸丁二醇酯。比较了不同催化剂的催化活性，并考察了固体酸的制备条件及酯化反应条件对催化活性的影响，得到最佳合成条件为:SO^2－₄/TiO₂/La³⁺于500 ℃下活化3 h，n(酸)∶n(醇)=2.8∶1，阻聚剂、催化剂质量分数分别为1.0%和1.2%，反应温度维持在120 ℃左右反应2 h左右，酯化率可达92.0%。

Synthesis of butanediol dimethylacrylate catalyzed by solid superacid SO~(2-)_4/TiO_2/La~(3+)

Butanediol dimethylacrylate was synthesized over solid superacid SO^2－₄/TiO₂/La³⁺Catalytic activity of different catalysts were compared and influence of preparation condition for the superacid and esterification reaction condition on the catalytic a activity were studied. The optimum conditions were obtained as follows: activation temperature 500 ℃, activation time 3 h, acid-to-alcohol molar ratio = 2.8∶1, mass fraction of catalyst and polymerization inhibitor = 1.2% and 1.0%, respectively, reaction temperature 200 ℃, reaction time 2 h, under which esterification rate of 92% was attained.