负载镧固体超强酸SO4^2-／TiO2催化合成DBS

将SO4^2-／TiO2负载镧制备了新型催化剂SO4^2-／La2O3-TiO2以癸二酸和正丁醇的酯化反应为探针，考察了不同制备条件对催化剂性能的影响，结果表明：La^3＋浸渍浓度为0．07mol／L，经110℃烘干后于500℃焙烧3h所得催化剂活性最好。采用正交实验法对影响酯化反应的因素进行考察，最佳实验条件为n（醇）：n（酸）=4：1，反应时间3h，催化剂用量1．5％（总物料），酯化率可达96．5％。且该催化剂具有良好的重复使用和再生能力。

Synthesis of DBS by Lanthanum Solid Super Acid SO42-/TiO2

A new type solid super acid catalyst with the composition of SO4^2-/TiO2 and added lanthanum was prepared by precipitation and impregnation. The esterification of sebacic acid and n - butanol over the catalyst was studied. The influences of preparation conditions on its catalytic properties were studied. The highest esterification yield was exhibited under the conditions of impregnation 0.07mol/L La2 （ SO4 ）^ 3, dryed at 110℃, calcinations at 500℃ for 3 h . The influence factors were investigated by experiment arranged by orthogonal design for esterification. The best condition was that n（alcohol） -n（acid） was 4：1 , reaction time was 3h, catalyst amount was 1.5% （ the total mass of reactants） and esterification yield of dibutyl sebacate was about 96.5%. And the catalyst was reused and regenerated.