摘要:以稀性固体超强酸SO42-/TiO2-La2O3为催化剂,通过苯甲醛和乙二醇反应合成苯甲醛乙二醇缩醛,探讨了SO42-/TiO2-La2O3对缩醛反应的催化活性,较系统地研究了醇醛物质的量比、催化剂用量、反应时间诸因素对产品收率的影响.实验表明:SO42-/TiO2-La2O3是合成苯甲醛乙二醇缩醛的良好催化剂,在n(醇)∶n(醛)=2.0 ∶ 1,催化剂用量为反应物料总质量的0.5%,环己烷为带水剂,反应时间50 min的优化条件下,苯甲醛乙二醇缩醛收率可达90%.
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